Decoding injury risk: Exploring the impact of asymptomatic hypermobility on lower limb injury risk factors in young female volleyball players

Generalized hypermobility is associated with higher rates of musculoskeletal injuries, a trend also observed in volleyball. We aimed to investigate how asymptomatic hypermobility affects other suggested lower limb injury risk factors. Fifty female volleyball players (22 hypermobile, 28 non-hypermobile) were assessed using Beighton scores (BS) and lower limb injury risk factors based on the Landing Error Scoring System, single-leg dynamic balance, and Limb Symmetry Index (LSI) for single-leg hop and triple hop for distance. Spearman's correlations assessed relationships between BS and the risk factors, and t-tests or Mann-Whitney U tests compared risk factors between non-hypermobile and asymptomatic hypermobile groups. No significant associations were found between BS and most risk factors, except for a negative correlation with the centre of pressure range of motion in the medio-lateral direction during dynamic balance on the non-dominant leg (ρ = -0.332; p = 0.015). The only significant group difference was in the LSI for single-leg hop distance, where the hypermobile group showed greater symmetry (r = 0.28, p = 0.041). The association between BS and dynamic balance was weak, with no clear difference in injury risk factors were observed between groups, suggesting hypermobile players may not need specialized training programs.

Lower Education Level Is Associated With Failure to Return to Sport Whereas Bony Bankart Lesions Predict Successful Return to Preinjury Sport Level After Open Latarjet Procedure

PURPOSE

To identify prognostic factors of patients that are associated with failure to return to sport (RTS) and return to preinjury level of sport (RTPS) after open Latarjet procedure.

METHODS

A multicenter retrospective case-control study was conducted across 5 hospitals in the Netherlands. Consecutive patients who underwent surgical treatment with the open Latarjet procedure between 2014 and 2019, with a minimum follow-up of 24 months, were invited to participate. Participants received a questionnaire after providing informed consent before inclusion. Failure to RTS was defined as no return to any type of sport, including noncollision/nonoverhead shoulder sport, high-impact/collision sport, and overhead shoulder sport. Failure to RTPS was defined as no return to the same or higher level of sport. Risk factors associated with failure to RTS or RTPS were identified using logistic regression analysis. Covariates were selected on the basis of univariate analyses.

RESULTS

One-hundred forty patients with a mean follow-up of 61 ± 30 months (range: 24-106 months) and a mean percentage glenoid bone loss of 19 ± 11% (range: 0-47%) were included. Twelve (9%) did not RTS and 48 (34%) did not RTPS. A lower level of education was associated with no RTS (odds ratio: 4.39; 95% confidence interval: 1.13-16.97; P = .03) and bony Bankart with successful RTPS (odds ratio: 0.36; 95% confidence interval: 1.17-6.55; P = .02). Patients who RTS had greater Oxford Shoulder Instability Score (42 ± 7 vs. 35 ± 10, P = .01) and patients who RTPS had greater OSIS (43 ± 6 vs 38 ± 8, P < .001) and satisfaction scores (8 ± 1 vs 7 ± 2, P < .001).

CONCLUSIONS

This study concluded that lower level of education is associated with failure to RTS and that bony Bankart is a prognostic factor of successful RTPS after an open Latarjet procedure.

LEVEL OF EVIDENCE

Level IV, retrospective case series.

No significant links between somatognosia, stereognosia, and hypermobility: sensory processing unlikely to drive common complaints in hypermobile population

BACKGROUND

Previous research has demonstrated impaired proprioception and poorer responses to tactile deep pressure, visual-tactile integration, and vestibular stimuli in individuals with generalized hypermobility, potentially leading to sensory processing issues. Therefore, we aimed to explore the influence of hypermobility on somatognosia and stereognosia.

METHODS

Forty-six participants were assessed using the Beighton score and categorized into three groups: non-hypermobile (n = 20), symptomatic hypermobile (n = 13), and asymptomatic hypermobile (n = 13). Somatognosia was evaluated using the shoulder width test in the vertical plane and pelvic width test in the vertical and horizontal planes. Stereognosia was assessed with Petrie's test. Spearman's rank correlation coefficient was examined the relationship between the Beighton score and measures of somatognosia and stereognosia. An unpaired t-test was used to compare variables between hypermobile (both symptomatic and asymptomatic) and non-hypermobile individuals, while a one-way ANOVA was used to compare data between the three groups.

RESULTS

No significant relationship was observed between Beighton scores and measures of somatognosia and stereognosia. The t-test revealed no statistically significant differences between hypermobile and non-hypermobile groups in the shoulder width, two pelvic widths, and Petrie's tests (all p ≥ 0.105). Similarly, one-way ANOVA showed no statistically significant differences between the three groups across these tests (all p ≥ 0.177).

CONCLUSIONS

The results indicate that somatognosia and stereognosia are not significantly related to the Beighton score and do not significantly differ between the groups studied. These sensory processing functions are unlikely to contribute to the common complaints reported by hypermobile individuals.

CLINICAL TRIAL NUMBER

Not applicable.

Addition of Modified Lemaire Lateral Extra-Articular Tenodesis in a Single stage Revision Anterior Cruciate Ligament Reconstruction using Peroneus Longus Tendon: A Prospective Study

Introduction

The purpose of this study is to assess the outcomes of patients that underwent single-stage revision ACL reconstruction (ACLR) with peroneus longus tendon (PLT), augmented with lateral extra-articular tenodesis (LET) using the modified Lemaire technique.

Material and Methods

All the 18 patients underwent arthroscopic single-stage revision ACLR using autologous PLT with an additional modified Limier LET procedure. Patients were thoroughly assessed pre- and post-operatively by the Lachman test, the pivot shift test, and the side-to-side difference by the Rolimeter. Functional evaluation was done with the help of the Lysholm score, the IKDC subjective score, Tegner score, VAS score, MARX activity rating scale and The American Orthopaedic Foot and Ankle Society (AOFAS) score. Post-operatively, patient satisfaction, return to sport, and physical activity were also recorded. SPSS ver. 22.0 software was used. Wilcoxon test, paired and unpaired t-tests were used to compare variables. Statistical significance was determined by a two-sided p-value <0.05.

Results

Regarding subjective evaluations; post-operative residual laxity, and return to sport and physical activity, all of the patients demonstrated excellent results. Post-operatively, there was significant improvement in the anterior knee laxity. According to the Marx Activity Rating Scale, the extent of sports engagement was significantly increased at 18 months following surgery (p<0.001). According to the AOFAS score (p=0.38), there were no documented significant donor site morbidities.

Conclusion

Single-stage revision ACLR using PLT with an additional modified Lemaire LET procedure results in a significant reduction in residual knee laxity with good clinical outcomes and a high return to play and physical activity.

Predictive Utility of the Functional Movement Screen and Y-Balance Test: Current Evidence and Future Directions

Musculoskeletal injury (MSI) risk screening has gained significant attention in rehabilitation, sports, and fitness due to its ability to predict injuries and guide preventive interventions. This review analyzes the Functional Movement Screen (FMS) and the Y-Balance Test (YBT) landscape. Although these instruments are widely used because of their simplicity and ease of access, their accuracy in predicting injuries is inconsistent. Significant issues include reliance on broad scoring systems, varying contextual relevance, and neglecting individual characteristics such as age, gender, fitness levels, and past injuries. Meta-analyses reveal that the FMS and YBT overall scores often lack clinical relevance, exhibiting significant variability in sensitivity and specificity among different groups. Findings support the effectiveness of multifactorial models that consider modifiable and non-modifiable risk factors such as workload ratios, injury history, and fitness data for better prediction outcomes. Advances in machine learning (ML) and wearable technology, including inertial measurement units (IMUs) and intelligent monitoring systems, show promise by capturing dynamic and personalized high-dimensional data. Such approaches enhance our understanding of how biomechanical, physiological, and contextual injury aspects interact. This review discusses the problems of conventional movement screens, highlights the necessity for workload monitoring and personalized evaluations, and promotes the integration of technology-driven and data-centered techniques. Adopting tailored, multifactorial models could significantly improve injury prediction and prevention across varied populations. Future research should refine these models to enhance their practical use in clinical and field environments.

Similar patient-reported outcomes but lower redislocation and higher revision rates following primary Latarjet vs. primary arthroscopic Bankart repair in patients with 10%-20% glenoid bone loss at a minimum 2-year follow-up

BACKGROUND

The amount of glenoid bone loss is closely related to the success rate of surgical treatment following anterior shoulder dislocations. There is an ongoing debate on the most successful treatment in patients with a subcritical amount (10%-20%) of glenoid bone loss (GBL). This study aimed to compare patient-reported outcome measures (PROMs) following primary open Latarjet procedure and primary arthroscopic Bankart repair (ABR) in patients with 10%-20% GBL at a minimum 2-year follow-up.

METHODS

This multicenter retrospective cohort study included 53 patients with traumatic anterior shoulder dislocations treated with Latarjet or ABR between 2011 and 2019. PROMs included the Western Ontario Shoulder Instability Index (WOSI) and Oxford Shoulder Instability Score (OSIS). Secondary outcomes included recurrence, complications, revision surgery, patient satisfaction, and return to sport (RTS).

RESULTS

The mean follow-up was 77 ± 31.7 months. Baseline characteristics were similar between ABR and Latarjet, except for time to follow-up (91 ± 30 vs. 61 ± 26 months, P < .001) and percentage GBL (15 ± 3 vs. 17 ± 3, P = .024). WOSI scores were higher in Latarjet patients compared with ABR; however, this difference was not statistically significant (220 vs. 457, P = .10). OSIS scores were similar following ABR and Latarjet (42 vs. 45, P = .33). Recurrence rates were higher in ABR patients (7 [24%] vs. 0 [0%] recurrences, P = .01), whereas revision rates were higher in Latarjet patients (4 vs. 0 revisions, P = .04). Patient satisfaction and complications were not different between the 2 procedures and neither achieved RTS and RTS to preinjury level.

CONCLUSION

The null hypothesis in which Latarjet and ABR show similar patient-reported outcomes could not be rejected based on the underpowered analysis. Patients treated with Latarjet did not have any recurrences vs. 7 in the ABR group (P = .01). However, revision rates were higher in Latarjet patients (4 vs. 0 revisions, P = .04).

Regulation of Joint Tissues and Joint Function: Is There Potential for Lessons to Be Learned Regarding Regulatory Control from Joint Hypermobility Syndromes?

Normal development of joints starts in utero with the establishment of a cellular and extracellular matrix template. Following birth, individual joint tissues grow and mature in response to biochemical and mechanical signals, leading to a coordinated pattern of further maturation resulting in a joint that functions as an organ system. Each joint develops and matures as an organ system defined by the biomechanical environment in which it will function. For those with joint hypermobility syndromes, either defined by specific genetic mutations or not (i.e., Ehlers-Danlos syndrome, Marfan syndrome, Loey-Dietz syndrome, hypermobility-type Ehlers-Danlos syndrome), this process is partially compromised, but many aspects of joint tissue maturation and resulting joint function is retained such that the organs form and retain partial function, but it is compromised. Comparing the characteristics of what is known regarding development, growth, maturation, and response to stressors such as puberty, pregnancy, and aging in joints of those without and with joint hypermobility leads to the conclusion that in those that have hypermobility syndromes, the joint systems may be compromised via a failure to undergo mechanical maturation, possibly via defective mechanotransduction. Given the breadth of the mutations involved in such hypermobility syndromes, further characterization of this concept may reveal commonalities in their impact on tissue maturation, which will further inform regulatory aspects of normal tissue and functional integrity. This review/perspective piece will attempt to detail such comparisons and summarize how further study will aid in further understanding.

Falls and balance impairment; what and how has this been measured in adults with joint hypermobility? A scoping review

BACKGROUND

People with joint hypermobility have excessive joint flexibility, which is more common in young women. The people with symptomatic hypermobility report poor balance and even falls. This scoping review aims to identify and map the available evidence related to balance and falling in adults with joint hypermobility to support research planning and ideas for treatment direction.

METHODS

A framework for the search was constructed using the Joanna Briggs Institute (JBI) approach. Electronic searches of primary evidence were performed using the following databases: Medline, Web of Science, CINAHL, Scopus and EMBASE. Papers written in English and published between 1946 and November 2023 were included. Titles, abstracts, and full papers were independently screened by two reviewers. Data extracted related to the population, the concept under investigation, the method of measurement, the level of evidence and the result.

RESULTS

Nineteen of 1,950 screened articles were included. In terms of the population, details related to ethnicity of the research participants was missing. The hypermobility classification criteria varied; it was not always clear if people who were hypermobile had symptoms. Concepts related to fear of falling, balance and adaptive strategies prompted by different postural tasks with and without vision were explored. Centre of pressure, muscle activity, kinematics and psychological factors were measured using force plates, electromyography (EMG), motion capture, patient and clinician reported outcome measures, focus groups and interviews. Most papers were low on the hierarchy of evidence (i.e. equal or lower than a case control study). The participants with joint hypermobility had increased sway, different muscle activity, and different kinematics compared to people without hypermobility. When surveyed, they commonly fell and had a fear of falling.

CONCLUSIONS

It is unclear whether the participants represent the population of people with hypermobility. Different classification systems were used making it difficult to generalise the results. Although the methods used suggest a low level of evidence, it seems clear that people who are hypermobile have poor balance. The underlying mechanisms driving poor balance have not been explored in depth.

Long-Read Sequencing Solves Complex Structure of CYP21A2 in a Large 21-Hydroxylase Deficiency Cohort

CONTEXT

Genetic testing for 21-hydroxylase deficiency (21-OHD) is always challenging. The current approaches of short-read sequencing and multiplex ligation-dependent probe amplification (MLPA) are insufficient for the detection of chimeric genes or complicated variants from multiple copies. Recently developed long-read sequencing (LRS) can solve this problem.

OBJECTIVE

To investigate the clinical utility of LRS in precision diagnosis of 21-OHD.

METHODS

In the cohort of 832 patients with 21-OHD, the current approaches provided the precise molecular diagnosis for 81.7% (680/832) of cases. LRS was performed to solve the remaining 144 cases with complex chimeric variants and 8 cases with variants from multiple copies. Clinical manifestations in patients with continuous deletions of CYP21A2 extending to TNXB (namely CAH-X) were further evaluated.

RESULTS

Using LRS in combination with previous genetic test results, a total of 16.9% (281/1664) CYP21A1P/CYP21A2 or TNXA/TNXB chimeric alleles were identified in 832 patients, with CYP21A1P/CYP21A2 accounting for 10.4% and TNXA/TNXB for 6.5%. The top 3 common chimeras were CYP21 CH-1, TNX CH-1, and TNX CH-2, accounting for 77.2% (217/281) of all chimeric alleles. The 8 patients with variants on multiple copies of CYP21A2 were accurately identified with LRS. The prevalence of CAH-X in our cohort was 12.1%, and a high frequency of connective tissue-related symptoms was observed in CAH-X patients.

CONCLUSION

LRS can detect all types of CYP21A2 variants, including complex chimeras and pathogenic variants on multiple copies in patients with 21-OHD, which could be utilized as a first-tier routine test for the precision diagnosis and categorization of congenital adrenal hyperplasia.

Intra- and interlimb effects of gait retraining in individuals with knee hyperextension

BACKGROUND

Gait retraining, which typically focuses on the most severely affected limb or joint, has shown promising results in treating faulty running and walking patterns. The closed-chain nature of gait during the stance phase may influence kinematic changes in the adjacent joints of the trained leg. In addition, the coupled nature of the lower extremity motion of gait suggests that changes in one leg may transfer to the other. This study aimed to assess the intra- and inter-limb transfer of kinematic changes following gait retraining to reduce knee extension in individuals with hyperextension walking patterns.

METHODS

Seventeen women with knee hyperextension gait patterns participated in six treadmill retraining sessions. All participants received verbal and real-time visual kinematic feedback in the form of knowledge of results. This intervention study took place at the Gait Analysis Laboratory at the University of Iowa. Mean peak sagittal-plane lower extremity joint kinematics during overground walking at pretraining, post-training, and 1- and 8-month follow-ups were calculated for analysis and comparisons.

FINDINGS

The post-training changes in ankle range of motion returned to baseline values by the 8-month follow-up. There was a significant transfer effect of kinematic changes to the untrained knee following gait retraining.

INTERPRETATION

Training one knee did not result in long-term compensatory kinematic changes in the other joints. In addition, the improvements in knee extension range of motion were transferred to the untrained knee and retained at the 8-month follow-up. This study supports the use of gait retraining as an effective clinical intervention.

Understanding the recurrent pulled elbow

Nursemaid elbow is subluxation of the radius head seen in early childhood. The aim of this study was to examine the epidemiology of recurrent dislocations and the effect of hyperlaxity and bone anatomy on recurrent dislocations in these injuries, for which the pathogenesis has not been fully clarified. The study included a total of 329 paediatric patients who presented at the Paediatric Emergency Department (ED) between January 2016 and December 2022, and were diagnosed with Nursemaid Elbow. On presentation at ED, two-directional elbow radiographs were taken of all the patients and the radius head-neck ratio was measured on the lateral elbow radiograph. The Beighton score of joint hyperlaxity was evaluated in all the patients with a history of recurrent dislocation. A statistically significant difference was determined between the Beighton score groups in respect of the number of dislocations in multiple dislocations ( P  = 0.002). No statistically significant relationship was determined between the number of dislocations and the lateral radius head/neck ratio ( P  = 0.061). Hyperlaxity syndrome should be kept in mind in the aetiology of multiple dislocations.

The relationship between Beighton score and biomechanical risk factors among adolescent, female volleyball players

OBJECTIVE

To investigate the relationship between Beighton score and biomechanical risk factors, such as knee valgus, in female, adolescent volleyball players.

DESIGN

Cross-sectional study.

SETTING

Biomechanics laboratory.

PARTICIPANTS

25 adolescent, club-level female volleyball athletes (14.5 ± 1.8 years) were tested between September 2021-November 2021.

MAIN OUTCOME MEASURES

Participants were asked to perform a double-leg vertical jump (DLVJ), a single-leg squat (SLS), and a single-leg drop landing (SLDL). Peak coronal plane angles during the DLVJ, SLS, and SLDL were computed. Spearman correlations were performed to identify significant relationships between Beighton score and biomechanical variables.

RESULTS

Peak knee valgus was found to be moderately correlated to Beighton score during the DLVJ-Land (r = 0.487, p = 0.014), SLDL (r = 0.478, p = 0.016), and SLS (r = 0.439, p = 0.028) tasks.

CONCLUSIONS

Overall, adolescent volleyball players with higher Beighton scores tended to exhibit a greater peak knee valgus, suggesting that such athletes could benefit from a targeted neuromuscular training or injury prevention program.

Recurrent patellar dislocation: personalised therapy or operative treatment? The REPPORT randomised trial protocol

INTRODUCTION

Recurrent patellar dislocation is a debilitating musculoskeletal condition, affecting mainly adolescents and adults under the age of 30. It can persist for many decades, causing pain and cartilage and soft-tissue damage, potentially leading to osteoarthritis. Recurrent patellar dislocation can be managed with physiotherapy or surgery. However, it is not known which treatment is most effective.

METHODS AND ANALYSIS

Recurrent Patellar Dislocation: Personalised Therapy or Operative Treatment (REPPORT) is a pragmatic, multicentre, two-arm, superiority, randomised controlled trial. It will compare the clinical and cost-effectiveness of an initial management strategy of personalised, phased and progressive rehabilitation, termed personalised knee therapy versus surgery for recurrent patellar dislocation.The trial's target sample size is 276 participants who will be recruited from approximately 20 sites across the UK. Participants will be randomly allocated to the two treatment groups via a central computer-based minimisation system. Treatment allocation will be in a 1:1 ratio, stratified by age, presence of patella alta and recruitment site.The primary outcome is participant-reported function using the Knee injury and Osteoarthritis Outcome 4-domain score at 18 months post randomisation. Health economic evaluation will be conducted from a healthcare system and personal social services perspective. Secondary outcome data including patellar instability, health utility, work/education status, satisfaction with social roles and treatment, health resource use and adverse events will be collected at 6, 12, 18 and 24 months. Analysis will be on an intention-to-treat basis and reported in-line with the Consolidated Standards of Reporting Trials statement.

ETHICS AND DISSEMINATION

The trial was approved by the East Midlands-Nottingham 2 Research Ethics Committee on 30 March 2023.Results will be disseminated via peer-reviewed publications, presentations at national and international conferences, in lay summaries, and using the REPPORT website and social media channels.

TRIAL REGISTRATION NUMBER

ISRCTN17972668.

Development, validation, and psychometric analysis of Foot and Ankle Flexibility Index (FAFI)

AIM

To develop a new tool for identifying joint hypermobility of the paediatric foot and ankle, based on a dichotomous scoring system utilising the Lower Limb Assessment Score (LLAS), to separate the foot and ankle items.

MATERIAL AND METHODS

A total of 205 children, aged between 5 and 10 years, participated in a cross-sectional study. The new tool Foot and Ankle Flexibility Index (FAFI) was predicated upon the last 7 items of LLAS, which are specific to the foot and ankle. The internal consistency was measured with Cronbach's test. Kappa statistics with 95% CI were calculated to verify the level of inter-rater and intra-rater agreement for the FAFI.

RESULTS

Cronbach's alpha returned 0.82. The correlations between items returned a mean of 0.59 (range: 0.43-0.74). The discrimination score on the ROC curve (4 points) showed that the model can be used to identify children with joint hypermobility of the foot and ankle. Inter-rater reliability was largely good (ICC = 0.89). Excellent intra-rater reliability was found (ICC = 0.96) CONCLUSIONS: This study identified high reliability between evaluators, and high sensitivity and specificity, for a new reliable and valid tool for the identification of foot and ankle joint hypermobility.

Variability of joint hypermobility in children: a meta-analytic approach to set cut-off scores

Current international consensus of the appropriate Beighton score cut-off to define if a child has generalised joint hypermobile or not is based upon expert opinion. Our aim was to determine the prevalence of Beighton scores of children worldwide to provide a recommendation for establishing the Beighton score cut-off to identify generalised joint hypermobility in children. We used AMED, OVID Medline, Embase and CINAHL to find published articles from inception to April 2024 describing Beighton scores of children up to and including 18 years from the general population. We extracted study demographics including country of publication, total number of participants, summary data about the age and sex of participant, Beighton scores and any cut-off used where authors deemed children hypermobile and how many children were rated at the corresponding Beighton scores. There were 37 articles reporting on the prevalence or incidence of hypermobility at cut-off scores from 28,868 participants. Using the cut-off of ≥ 6 resulted in a prevalence of 6% for studies reporting male data and 13% for studies reporting female data. Limited data reporting availability precluded further sub-analysis at a Beighton score of ≥ 7, age, pubertal status and ethnicity.    Conclusion: The working threshold for identifying generalised joint hypermobility in children should be a Beighton score of 6 or more. Our analysis also suggests a Beighton score of 7 or greater may be appropriate in childhood, particularly for females. What is Known: • The working threshold for identifying generalised joint hypermobility in children previously was set based on expert opinion. What is New: • The threshold to identify hypermobility in children should be at a minimum of ≥ 6 on the Beighton score.

Behavioural, developmental and psychological characteristics in children with germline PTEN mutations: a carer report study

BACKGROUND

PTEN is primarily known as a tumour suppressor gene. However, research describes higher rates of difficulties including intellectual disability and difficulties relating to autism spectrum conditions (ASCs) in people with germline PTEN mutations. Other psychological characteristics/experiences are less often reported and are explored in this study.

METHODS

The parents of 20 children with PTEN mutations completed an online survey exploring adaptive behaviour, ASC-associated behaviours, anxiety, mood, hypermobility, behaviours that challenge, sensory experiences, quality of life and parental wellbeing. Published normative data and data from groups of individuals with other genetic neurodevelopmental conditions were used to contextualise findings.

RESULTS

Overall levels of adaptive behaviour were below the 'typical' range, and no marked relative differences were noted between domains. Higher levels of ASC-related difficulties, including sensory experiences, were found in comparison with 'typically developing' children, with a possible peak in restrictive/repetitive behaviour; ASC and sensory processing atypicality also strongly correlated with reported joint hypermobility. A relative preservation of social motivation was noted. Anxiety levels were found to be elevated overall (and to relate to sensory processing and joint hypermobility), with the exception of social anxiety, which was comparable with normative data. Self-injurious behaviour was common.

CONCLUSIONS

Results suggest a wide range of possible difficulties in children with PTEN mutations, including elevated anxiety. Despite elevated ASC phenomenology, social motivation may remain relatively strong. Firm conclusions are restricted by a small sample size and potential recruitment bias, and future research is required to further explore the relationships between such characteristics.

Beyond Confirmed Mast Cell Activation Syndrome: Approaching Patients With Dysautonomia and Related Conditions

Allergist-immunologists face significant challenges as experts in an ever-evolving field of neuroimmunology. Among these challenges is the increasingly frequent need to counsel patients with suspected mast cell activation disorders about perceived comorbidities, which may include hypermobile Ehlers-Danlos syndrome, amplified pain syndrome, fibromyalgia, burning sensation syndromes, migraines, irritable bowel syndrome, and postural orthostatic tachycardia syndrome. Patients may experience comorbid anxiety, panic disorder, and depression associated with disturbed sleep, fatigue, and cognitive impairment that often worsen when their physical symptoms increase in severity. These conditions may mimic mast cell activation disorders and are emotionally taxing for patients and clinicians because they are often accompanied by vague diagnostic courses, perceived unmanageability, social stigma, and significant impairment in quality of life. Combined with relatively poorly researched therapies, it is no surprise that clinicians may feel overwhelmed or find it difficult to provide consistently compassionate care for this population. In this article, we review available therapies for these conditions, which run the gamut from physical therapy to antidepressants to multimodal pain control. We highlight the benefit of multidisciplinary care within the primary care home, which includes an important role by the allergist-immunologist. By outlining simple approaches to initial treatment, we hope to empower clinicians with the tools needed to curb emotional burnout and embrace this patient population with compassion.

The strength of balance: Strength and dynamic balance in children with and without hypermobility

BACKGROUND

Generalized Joint hypermobility (GJH) is predominantly non-symptomatic. In fact, individuals with joint flexibility usually perform better than their non-hypermobile counterparts during physical activities. Notwithstanding, strength and balance are essential to maintain the control of the extra range of motion during activities and to prevent musculoskeletal complications. There are limited and conflicting pieces of evidence in literature regarding the association between strength and balance in children with GJH.

OBJECTIVES

The purpose of this study was to examine differences in functional strength, dynamic balance, proprioception, and isometric strength in children with and without joint hypermobility and determine the association between strength outcomes and dynamic balance.

METHOD

A cross-sectional study was conducted among children aged 6 to 11. Hypermobility was determined using the Beighton Score, with scores ≥6 representing hypermobility. Functional strength was assessed with the Functional Strength Measure (FSM), isometric strength was determined with a handheld dynamometer (HHD), the Y-Balance Test (YBT) was used to assess dynamic balance and the Wedges test to measure proprioception.

RESULTS

This study included 588 participants (age: 7.97 ± 1.3 years; height: 128±10.1 cm; mass: 27.18 ± 7.98 kg). 402 children were classified as having normal mobility and 186 as being hypermobile. Hypermobile children had better functional strength in the lower extremities than children with normal range mobility but lower reach distance in the YBT. No differences in proprioception, functional strength of the upper extremity or isometric strength in the hands were found. However, isometric lower extremity force was less in hypermobile children than children with normal range mobility. Irrespective of their joint mobility, a fair significant correlation existed between total Y-balance distance and FSM items r = 0.16-0.37, p = 0.01. Correlations between total Y-balance distance and isometric strength of knee and ankle muscles ranged between r = 0.26-0.42, p = 0.001.

CONCLUSION

Hypermobile joints seem to co-occur with lower extremity isometric strength, more functional strength in the lower extremities and less reaching distance in dynamic balance. The opposing direction of the results on functional and isometric strength tests highlights the importance of the type of outcome measures used to describe the association of strength and the range of motion.

Flatfoot arch correction with generic 3D-printed orthoses at different body weight percentages

BACKGROUND

Flatfoot can be associated with foot pathologies and treated conservatively with foot orthoses to correct arch collapse and alleviate painful symptoms. Recently, 3D printing has become more popular and is widely used for medical device manufacturing, such as orthoses. This study aims at quantifying the effect of generic 3D-printed foot orthoses on flatfoot arch correction under different static loading conditions.

METHODS

Participants with normal and flatfeet were recruited for this cross-sectional study. Clinical evaluation included arch height, foot posture index, and Beighton flexibility score. Surface imaging was performed in different loading conditions: 1) 0% when sitting, 2) 50% when standing on both feet, and 3) 125% when standing on one foot with a weighted vest. For flatfoot participants, three configurations were tested: without an orthosis, with a soft generic 3D printed orthosis, and with a rigid 3D printed orthosis. Arch heights and medial arch angles were calculated and compared for the different loading conditions and with or without orthoses. The differences between groups, with and without orthoses, were analyzed with Kruskal-Wallis tests, and a p < 0.05 was considered significant.

RESULTS

A total of 10 normal feet and 10 flatfeet were analyzed. The 3D printed orthosis significantly increased arch height in all loading conditions, compared to flatfeet without orthosis. Wearing an orthosis reduced the medial arch angle, although not significantly. Our technique was found to have good to excellent intra and interclass correlation coefficients.

CONCLUSIONS

Generic 3D printed orthoses corrected arch collapse in static loading conditions, including 125% body weight to simulate functional tasks like walking. Our protocol was found to be reliable and easier to implement in a clinical setting compared to previously reported methods.

LEVEL OF EVIDENCE

II.

Beyond Contractures in Spinal Muscular Atrophy: Identifying Lower-Limb Joint Hypermobility

Background: The natural history of spinal muscular atrophy (SMA) is well understood, with progressive muscle weakness resulting in declines in function. The development of contractures is common and negatively impacts function. Clinically, joint hypermobility (JH) is observed but is poorly described, and its relationship with function is unknown. Methods: Lower-limb ROM (range of motion) assessments of extension and flexion at the hip, knee, and ankle were performed. ROMs exceeding the published norms were included in the analysis. The functional assessments performed included the six-minute walk test (6 MWT) and the Hammersmith Functional Motor Scale-Expanded (HFMSE). Results: Of the 143 participants, 86% (n = 123) had at least one ROM measure that was hypermobile, and 22% (n = 32) had three or more. The HFMSE scores were inversely correlated with hip extension JH (r = -0.60, p = 0.21; n = 6) and positively correlated with knee flexion JH (r = 0.24, p = 0.02, n = 89). There was a moderate, inverse relationship between the 6 MWT distance and ankle plantar flexion JH (r = -0.73, p = 0.002; n = 15). Conclusions: JH was identified in nearly all participants in at least one joint in this study. Hip extension, knee flexion and ankle plantar flexion JH was associated with function. A further understanding of the trajectory of lower-limb joint ROM is needed to improve future rehabilitation strategies.

The association of pain with gait spatiotemporal parameters in children with hypermobile Ehlers-Danlos syndrome and hypermobility spectrum disorder

BACKGROUND

Children with hypermobility spectrum disorder/hypermobile Ehlers-Danlos syndrome (HSD/hEDS) have a high prevalence of chronic pain, which may influence gait dynamics. However, little is known about pain outcomes and their association with gait spatiotemporal parameters in children with HSD/hEDS.

RESEARCH QUESTION

Does pain correlate with gait spatiotemporal parameters in children with HSD/hEDS?

METHODS

Eighteen children with HSD/hEDS and eighteen typically developing (TD) children participated in the study. The current level of pain (0-10 on the numeric rating scale), modified Brief Pain Inventory, and Pain Catastrophizing Scale-Child version were implemented to assess pain in children with HSD/hEDS. All children completed a gait analysis at a self-selected speed. Mean and variability (measured using the coefficient of variation) of gait spatiotemporal parameters were analyzed. Gait parameters included stride length, stride time, gait speed, percent stance time, and step width. A Mann-Whitney U-test was used to compare the gait parameters between children with HSD/hEDS and TD children. Spearman correlations were used to examine the relationships between pain and gait spatiotemporal parameters in children with HSD/hEDS.

RESULTS

Children with HSD/hEDS had a longer percent stance time compared to TD children (p = 0.03). Lower pain interference in relationships with other people was significantly associated with faster gait speeds (ρ = -0.55, p = 0.03). Children with HSD/hEDS also had greater pain interference during mobility (ρ = 0.5, p = 0.05) and going to school (ρ = 0.65, p = 0.01), which were significantly correlated with greater stride length variability. Greater pain interference during enjoyment of life was significantly associated with greater percent stance time variability (ρ = 0.5, p = 0.05). Greater pain catastrophizing was correlated with decreased step width variability in children with HSD/hEDS (ρ = -0.49, p = 0.05).

SIGNIFICANCE

Pain interference and catastrophe were significantly associated with gait spatiotemporal variability. Our findings suggest that assessing pain-associated gait alterations may help understand the clinical features and gait kinematics of children with HSD/hEDS.

Looking back and beyond the 2017 diagnostic criteria for hypermobile Ehlers-Danlos syndrome: A retrospective cross-sectional study from an Italian reference center

The most common conditions with symptomatic joint hypermobility are hypermobile Ehlers-Danlos syndrome (hEDS) and hypermobility spectrum disorders (HSD). Diagnosing these overlapping connective tissue disorders remains challenging due to the lack of established causes and reliable diagnostic tests. hEDS is diagnosed applying the 2017 diagnostic criteria, and patients with symptomatic joint hypermobility but not fulfilling these criteria are labeled as HSD, which is not officially recognized by all healthcare systems. The 2017 criteria were introduced to improve diagnostic specificity but have faced criticism for being too stringent and failing to adequately capture the multisystemic involvement of hEDS. Herein, we retrospectively evaluated 327 patients from 213 families with a prior diagnosis of hypermobility type EDS or joint hypermobility syndrome based on Villefranche and Brighton criteria, to assess the effectiveness of the 2017 criteria in distinguishing between hEDS and HSD and document the frequencies of extra-articular manifestations. Based on our findings, we propose that the 2017 criteria should be made less stringent to include a greater number of patients who are currently encompassed within the HSD category. This will lead to improved diagnostic accuracy and enhanced patient care by properly capturing the diverse range of symptoms and manifestations present within the hEDS/HSD spectrum.

The effects of joint hypermobility on pain and functional biomechanics in adolescents with juvenile fibromyalgia: secondary baseline analysis from a pilot randomized controlled trial

BACKGROUND

Joint hypermobility is a common clinical finding amongst hereditary connective tissue disorders that is observed in pediatric rheumatological settings, and often associated with chronic pain. Joint hypermobility may also contribute to deficits in physical functioning and physical activity, but previous findings have been inconsistent. It is possible that physical activity impairment in joint hypermobility may be due to chronic aberrant movement patterns subsequent to increased joint laxity.

METHOD

As part of a larger randomized pilot trial of juvenile onset fibromyalgia (JFM), a secondary analysis was conducted to explore whether adolescents with JFM and joint hypermobility differed from non-joint hypermobility peers in terms of pain, daily functioning, and biomechanics (i.e., kinetics and kinematics) during a moderately vigorous functional task.

RESULTS

From the larger sample of adolescents with JFM (N = 36), 13 adolescents (36.1%) met criteria for joint hypermobility and 23 did not have joint hypermobility. Those with joint hypermobility exhibited poorer overall functioning (Md = 20, Q1,Q3 [5.8, 7.6] vs. Md = 29, Q1,Q3 [5.1, 7.6]) but there were no differences in pain (Md = 6.9, Q1,Q3 [22, 33], vs. Md = 6.45, Q1,Q3 [15, 29.5]). Inspection of time-series plots suggests those with joint hypermobility exhibited decreased hip flexion and frontal plane hip moment (e.g., resistance to dynamic valgus) during the landing phase (early stance) and greater hip and knee transverse plane moments during the propulsion phase (late stance) of the drop vertical jump task (DVJ). No other differences in lower extremity biomechanics were observed between study groups.

CONCLUSIONS

In this exploratory study, there were small but notable differences in biomechanics between patients with JFM who also had joint hypermobility versus those without joint hypermobility during a landing and jumping task (e.g., DVJ). These differences may indicate decreased joint stiffness during landing, associated with increased joint laxity and decreased joint stability, which may put them at greater risk for injury. Further study with a larger sample size is warranted to examine whether these biomechanical differences in patients with JFM and joint hypermobility affect their response to typical physical therapy or exercise recommendations.

A narrative review of the literature on illness uncertainty in hypermobile ehlers-danlos syndrome: implications for research and clinical practice

BACKGROUND

Hypermobile Ehlers-Danlos syndrome (hEDS) is characterized by joint and skin laxity, and often accompanied by chronic pain, dysautonomia, increased distress and, functional limitations. The journey to accurate diagnosis is often prolonged due to unclear etiology of symptoms. This manuscript is a narrative review of the literature on illness uncertainty (IU) in hEDS, highlighting the unique facets of IU in this population, as compared to the broader chronic pain population (given symptom overlap between these two disease groups), that warrant additional investigation. Additionally, we considered the unique challenges associated with IU in the context of the developmental nuances of pediatric populations. Specifically, we aimed to (1) map the extant literature of the IU experience in chronic pain conditions broadly including the pediatric and adult research to identify key concepts related to IU and incorporate potential developmental considerations in IU; (2) delineate and describe the IU experience specifically in patients with hEDS, with the goal of identifying gaps in the literature based on aspects of presentation in hEDS that do and do not differ from the broader chronic pain population; and (3) elucidate the potential areas of adverse impact of IU in both general chronic pain populations, and those with hEDS specifically, to provide actionable areas for future research and clinical care of individuals with hEDS. Results of this review indicate that IU has been well-studied in chronic pain generally, but inadequately evaluated in hEDS specifically. Specific features of hEDS (complexity of the disorder, involvement of multiple bodily systems, contribution of organic pathology) may uniquely contribute to IU in this population. This review suggests that ambiguities surrounding the diagnosis of hEDS, symptom course, and treatment recommendations, along with misdiagnosis, perceived dismissal of symptoms, or attribution of symptoms to mental health concerns might increase risk for IU and related distress in patients.

CONCLUSION

Findings from the present review suggest that distinct features of hEDS yield a set of driving factors for IU that may be somewhat different than those faced by patients with chronic pain or other medical conditions. The development of a validated measure of IU to appropriately assess this construct in patients with hEDS is a research priority. In the clinical setting, providers should be attentive to the potentially aversive diagnostic and treatment experiences reported by patients and attempt to provide clear explanations based on the extant knowledge of hEDS, and implement best-practice recommendations for multidisciplinary treatment.

Donor-Site Complication of Severe Valgus Ankle Deformity in an Adult With Ehlers-Danlos Syndrome Following Free Vascularized Fibular Grafting

Valgus deformity of the ankle joint is a well-known and relatively common donor-site complication of free vascularized fibular graft harvest in children. Due to children having naturally greater ligamentous laxity than adults, the tibiofibular syndesmosis can be compromised with the loss of the fibular shaft, leading to valgus ankle deformity (VAD). Syndesmotic stabilization with screws is commonly recommended in subsets of pediatric patients at the greatest risk of this complication. In adults, the occurrence of VAD is seldom reported in the literature following fibular graft harvest. As such, no recommendation for syndesmotic stabilization exists in the adult population. We present a case of end-stage VAD in an adult patient with Ehlers-Danlos syndrome (EDS) following free vascularized fibular graft harvest. We hypothesize that other patients with generalized joint hypermobility may face the same complication and, thus, recommend the consideration of syndesmotic stabilization or primary syndesmotic fusion at the time of graft harvest in this patient population.

Pediatric joint hypermobility: a diagnostic framework and narrative review

BACKGROUND

Hypermobile Ehlers-Danlos syndrome (hEDS) and hypermobility spectrum disorders (HSD) are debilitating conditions. Diagnosis is currently clinical in the absence of biomarkers, and criteria developed for adults are difficult to use in children and biologically immature adolescents. Generalized joint hypermobility (GJH) is a prerequisite for hEDS and generalized HSD. Current literature identifies a large proportion of children as hypermobile using a Beighton score ≥ 4 or 5/9, the cut off for GJH in adults. Other phenotypic features from the 2017 hEDS criteria can arise over time. Finally, many comorbidities described in hEDS/HSD are also seen in the general pediatric and adolescent population. Therefore, pediatric specific criteria are needed. The Paediatric Working Group of the International Consortium on EDS and HSD has developed a pediatric diagnostic framework presented here. The work was informed by a review of the published evidence.

OBSERVATIONS

The framework has 4 components, GJH, skin and tissue abnormalities, musculoskeletal complications, and core comorbidities. A Beighton score of ≥ 6/9 best identifies children with GJH at 2 standard deviations above average, based on published general population data. Skin and soft tissue changes include soft skin, stretchy skin, atrophic scars, stretch marks, piezogenic papules, and recurrent hernias. Two symptomatic groups were agreed: musculoskeletal and systemic. Emerging comorbid relationships are discussed. The framework generates 8 subgroups, 4 pediatric GJH, and 4 pediatric generalized hypermobility spectrum disorders. hEDS is reserved for biologically mature adolescents who meet the 2017 criteria, which also covers even rarer types of Ehlers-Danlos syndrome at any age.

CONCLUSIONS

This framework allows hypermobile children to be categorized into a group describing their phenotypic and symptomatic presentation. It clarifies the recommendation that comorbidities should be defined using their current internationally accepted frameworks. This provides a foundation for improving clinical care and research quality in this population.

Prevalence and Demographic Distribution of Hypermobility in a Random Group of School-Aged Children in Nigeria

BACKGROUND

The purpose of this study was to determine the prevalence of hypermobility in randomly selected healthy children, without previous trauma or disease process affecting the joints and whether other demographic variables (age, sex, BMI) had an impact on Beighton scores and range of motion (RoM) in children between 6 and 10 years of age.

RESULTS

286 children were included; 27.3% of them had a Beighton score ≥7/9 and 72% would be classified hypermobile if we had used a Beighton cut-off score ≥4/9. Prevalence declined with increasing age. Girls were more often hypermobile (34%) than boys (20%) and this was mainly caused by increased RoM in the knees. Positive scores of finger items of the Beighton were more common than on the other items, leading to a high prevalence of peripheral hypermobility. Localized hypermobility was only found in the fifth MCP joint. A total of 15% of the children with normal mobility reached 20 excess degrees RoM of the left and right fifth MCP. Pain was present in 12 of the 239 children but was not linked to the level of mobility.

CONCLUSION

Hypermobility is the rule in this pain-free population of children with GJH.

Krafttraining bei Frauen mit generalisierter Hypermobilität: Machbarkeit, Beschwerden und Effekte

Hintergrund Eine generalisierte Hypermobilität liegt vor, wenn die Beweglichkeit in mehreren Gelenken das übliche Maß übersteigt. Bis zu 30 % der Frauen und 10 % der Männer sind davon betroffen. Hypermobilität ist keine Pathologie, wenn sie jedoch mit Schmerzen und weiteren Symptomen einhergeht, kann sie die Gesundheit und Alltagsfunktionen beeinträchtigen. Zur physiotherapeutischen Behandlung gibt es wenige Studien, wobei Krafttraining eine mögliche Intervention sein könnte.

Ziel Erfassung der Machbarkeit und des Effekts eines Krafttrainings für Frauen mit generalisierter Hypermobilität.

Methode Pre-post-Studie, in der hypermobile Frauen (Beighton-Score > 5) zwischen 20 und 40 Jahren während 12 Wochen ein Krafttraining an Geräten, fokussiert auf Beine und Rücken, absolvierten. Mithilfe eines Protokolls und wöchentlicher Fragebogen wurden das Training und dadurch ausgelöste Beschwerden analysiert. Vor und nach dem Training wurde die Kraft der Knieflexoren und -extensoren sowie der Muskelquerschnitt am Oberschenkel gemessen. Die Analyse erfolgte primär deskriptiv, zusätzlich erfolgte ein Vergleich von 2 Subgruppen mittels Mann-Whitney-U und Chi2-Test.

Ergebnisse 46 Teilnehmerinnen (26,3 ± 4,3 Jahre) absolvierten das Training. 6 davon brachen die Studie vorzeitig ab, davon eine wegen Rückenschmerzen aufgrund einer Diskushernie. 72,5 % der verbleibenden 40 Teilnehmerinnen absolvierten 20 oder mehr Trainings. In 34 % der Trainingswochen wurden geringe Beschwerden angegeben, mehrheitlich an Knie und Rücken. Der Einsatz der verwendeten Gewichte war oft tief, so wurde auf der Legpress mit durchschnittlich 44,8 % des Körpergewichts begonnen, nach 12 Wochen lag das Trainingsgewicht im Mittel bei 52,2 kg, was 85,7 % des Körpergewichts entspricht. Bei der Kraft und beim Muskelquerschnitt wurden keine signifikanten Verbesserungen erreicht, wobei bis zu 17 Teilnehmerinnen (42,5 %) eine Verbesserung von mehr als 10 % erreichten.

Schlussfolgerung Das Krafttraining war für die meisten Teilnehmerinnen machbar und gut verträglich. Das mehrheitlich selbstgesteuerte Training war zu wenig intensiv, um eindeutige Auswirkungen auf Kraft oder Muskelmasse zu erreichen, obwohl einzelne Teilnehmerinnen durchaus davon profitierten. In weiteren Studien sollten individuellere und enger begleitete Trainingsprogramme untersucht werden.

Reproducibility of Hypermobility Assessment Scales for Children When Performed Using Telehealth versus In-Person Modes

AIMS

Evaluate reproducibility of hypermobility assessments using in-person versus telehealth modes.

METHODS

Hypermobility of 20 children (7-12 years) was evaluated using the Beighton Score, Upper Limb Hypermobility Assessment Tool (ULHAT), and Lower Limb Assessment Score (LLAS) via in-person and telehealth modes. Agreement between the two modes was examined using percentage of exact agreement (%EA and %EA ± 2), Limits of Agreement (LoA) and Smallest detectable change (SDC). Reliability was calculated using intra-class correlation coefficients (ICCs).

RESULTS

Agreement between modes for total Scores was best for the Beighton (%EA = fair, %EA ± 2 = good), then the ULHAT (%EA = poor, %EA ± 2 = excellent), and LLAS (%EA = poor, %EA ± 2 = fair). Total scores for all scales showed wide LoA, large SDC (25-31%), and fair to good reliability (ICC = 0.54-0.61). Exact agreement for Generalized Joint Hypermobility classification was excellent for the Beighton (≥7/9 threshold) and fair for the ULHAT and LLAS (≥7/12 threshold). Percentage of individual test items with good/excellent agreement was highest for the Beighton (78%, 7/9 items), then the ULHAT (58%, 14/24) and LLAS (42%, 10/24).

CONCLUSION

Total Scores of hypermobility scales showed low exact agreement between in-person and telehealth, but fair-excellent agreement within two points. Classification using the Beighton ≥7/9 threshold was excellent. Research is recommended to increase accuracy of online assessments.

Hand Impairment and Function in Children and Adolescents With Heritable Disorders of Connective Tissue

Importance: Heritable disorders of connective tissue (HDCTs) affect hand function and participation in daily activities for children and adolescents.

Objective: To describe hand impairment and function and determine the extent to which hand impairment and function explain the variation in self-reported functional performance.

Design: Cross-sectional observational study.

Setting: Specialist tertiary hospital.

Participants: Children and adolescents ages 8–18 yr with HDCTs (N = 73).

Intervention: None.

Outcomes and Measures: Hand function outcomes included grip strength (digital dynamometer), manipulation and dexterity (Functional Dexterity Test, Nine-Hole Peg Test), and fine motor skills (Bruininks–Oseretsky Test of Motor Proficiency). Upper limb hypermobility was assessed using the Upper Limb Hypermobility Assessment Tool. Hand pain and fatigue were recorded for a timed button test and 3- and 9-min handwriting tasks. Functional performance was measured using the Childhood Health Assessment Questionnaire.

Results: Scores on all hand function measures were below expected norms. Pain and fatigue were significantly worse after the writing tasks (p &lt; .001) but not the button test (p &gt; .40). Secondary students had significantly lower handwriting scores than primary students (p = .03) but similar grip strength z scores (p = .95). Variation in self-reported functional performance was explained by grip strength (6%) and upper limb hypermobility and dexterity (16%).

Conclusions and Relevance: Young people with HDCTs have poor hand function attributable to poor grip strength and hand pain and fatigue. Comprehensive upper limb evaluation and ongoing monitoring throughout the school years are warranted to inform timely intervention.

What This Article Adds: Children and adolescents with heritable disorders of connective tissue have difficulty with hand function that affect their participation in daily activities. The results of this study can help clinicians identify, assess, and monitor daily activities, performance skills, and symptoms of children and adolescents with HDCTs to promote their participation in all aspects of daily life.

The coronal lateral collateral ligament sign in the anterior cruciate ligament-injured knees was observed regardless of the knee laxity based on the quantitative measurements

PURPOSE

The coronal lateral collateral ligament (LCL) sign has been reported to be associated with deviated position of the tibia on MRI due to anterior cruciate ligament (ACL) injuries. However, the relationships between LCL sign and clinical knee laxity evaluations are still unclear. The purpose of the study was to investigate the relationship between the coronal LCL sign and knee laxity measurements.

METHODS

A retrospective review of unilateral ACL injured patients who underwent ACL reconstruction was performed. The coronal LCL sign was determined using magnetic resonance imaging (MRI). Clinical grading of the pivot-shift test, KT-1000 measurements, and quantitative measurements of the Lachman test and the pivot-shift test using an electromagnetic system, were compared between patients with positive and negative coronal LCL sign. A subgroup analysis of different age groups was then performed, dividing patients to adolescent (age ≤ 18 years) and adult (age > 18 years) groups.

RESULTS

A total of 85 patients were enrolled, of which 45 patients had coronal LCL signs. The coronal LCL sign was not associated with the pivot-shift test clinical grading (n.s), KT-1000 measurement (n.s), the tibial translation during the Lachman test (n.s), or with tibia acceleration (n.s) and translation (n.s) during the pivot-shift test. The subgroup analysis also showed that the aforementioned parameters were not associated with the coronal LCL sign in either adolescent or adult subgroups.

CONCLUSION

The occurrence of coronal LCL sign in MRI did not imply greater clinical knee laxity evaluations in patients with ACL tears. The knee laxity should routinely be evaluated regardless the coronal LCL sign.

LEVEL OF EVIDENCE

Level III.

Lateral abdominal muscles of adults with hypermobility may be partially impaired during contraction

Background

Muscle function may be impaired in people with generalised hypermobility, yet prior studies have primarily focused on muscles within the extremities. We aimed to examine changes in lateral abdominal muscle (transversus abdominis (TrA) and the external (EO) and internal abdominal obliques (IO)) thickness and length during contraction between participants with and without hypermobility.

Methods

This cross-sectional study examined 12 participants with hypermobility and 12 age-matched, sex-matched, height-matched and weight-matched participants without hypermobility. The Beighton and Belavy-Owen-Mitchell score assessed systemic hypermobility. Muscle thickness and length were measured via panoramic ultrasound scans at rest and during contraction.

Results

When compared with rest across all lumbar levels (L1–L5), contraction produced a lesser increase in TrA thickness (β=0.03, p=0.034) for participants with hypermobility compared with control. No group-by-condition interaction was observed for TrA length across all lumbar levels (L1–L5; p=0.269). Contraction produced a greater decrease in EO thickness (β=0.08, p=0.002) at L3 only for participants with hypermobility compared with control. No group-by-condition interactions were observed for IO thickness.

Conclusion

Participants with hypermobility had partially impaired lateral abdominal muscle function given a lesser ability to increase TrA muscle thickness during contraction compared with controls.

International Perspectives on Joint Hypermobility: A Synthesis of Current Science to Guide Clinical and Research Directions

ABSTRACT

There is exponential clinical and research interest in joint hypermobility due to recognition of the complexity of identification, assessment, and its appropriate referral pathways, ultimately impacting management. This state-of-the-science review provides an international, multidisciplinary perspective on the presentation, etiology, and assessment of joint hypermobility, as it presents in those with and without a systemic condition. We synthesize the literature, propose standardizing the use of terminology and outcome measures, and suggest potential management directions. The major topics covered are (i) historical perspectives; (ii) current definitions of hypermobility, laxity, and instability; (iii) inheritance and acquisition of hypermobility; (iv) traditional and novel assessments; (v) strengths and limitations of current assessment tools; (vi) age, sex, and racial considerations; (vii) phenotypic presentations; (viii) generalized hypermobility spectrum disorder and hypermobility Ehlers-Danlos syndrome; and (ix) clinical implications and research directions. A thorough understanding of these topics will equip the reader seeking to manage individuals presenting with joint hypermobility, while mindful of its etiology. Management of generalized joint hypermobility in the context of a complex, multisystem condition will differ from that of acquired hypermobility commonly seen in performing artists, specific athletic populations, posttrauma, and so on. In addition, people with symptomatic hypermobility present predominantly with musculoskeletal symptoms and sometimes systemic symptoms including fatigue, orthostatic intolerance, and gastrointestinal or genitourinary issues. Some also display skeletal deformities, tissue and skin fragility, and structural vascular or cardiac differences, and these warrant further medical follow-up. This comprehensive review on the full spectrum of joint hypermobility will assist clinicians, coaches/sports trainers, educators, and/or researchers in this area.

The anterior talofibular ligament ratio was greater in young men with generalized joint laxity than in those without generalized joint laxity

PURPOSE

This study aimed to evaluate the relationship between generalized joint laxity (GJL) and stress ultrasonographic (US) findings of the anterior talofibular ligament (ATFL) of healthy young men.

METHODS

The ATFL lengths of healthy young men were consecutively measured in the stress and nonstress positions. The ATFL ratio was calculated as an indicator of lateral ankle laxity. GJL was evaluated using the Beighton score (BS), and a BS of ≥ 5 was considered GJL. The manual anterior drawer test (ADT) was also performed. The results of stress US and ADT were compared between subjects with and without GJL, and the correlation between GJL and US findings was examined.

RESULTS

A total of 13 subjects with GJL and 95 without GJL were included in the study. The mean BSs in the GJL and no-GJL groups were 5.9 ± 0.9 and 1.1 ± 1.3, respectively (p < 0.0001). The GJL group showed a higher grade of ADT than the no-GJL group (p < 0.0001). Significant differences were found in the stress ATFL length (23.6 ± 1.8 mm vs. 21.7 ± 1.8 mm, p = 0.002) and ATFL ratio (1.15 ± 0.06 vs. 1.07 ± 0.03, p < 0.0001) between the GJL and no-GJL groups. Spearman's correlation coefficients showed a moderate correlation between the BS and ATFL ratio (r = 0.45, p < 0.0001).

CONCLUSION

The present study showed significant differences in the ATFL ratio and stress ATFL length between young men with and without GJL. The BS was moderately correlated with the lateral ankle laxity in this population.

LEVEL OF EVIDENCE

Level IV.

Patients With Generalized Joint Hypermobility Have Thinner Superior Hip Capsules and Greater Hip Internal Rotation on Physical Examination

Purpose

To compare preoperative hip range of motion (ROM), hip capsular thickness on magnetic resonance imaging (MRI), and bony morphology on radiographs and computed tomography (CT) between patients with and without joint hypermobility as measured by the Beighton Test score (BTS), with subanalysis based on sex and age.

Methods

Consecutive patients who underwent hip arthroscopy for a diagnosis of femoroacetabular impingement syndrome with or without dysplasia were retrospectively reviewed. Patient BTS, hip ROM, demographics, surgical data, morphologic measures on radiographs and CT, and MRI findings including hip capsule thickness at various locations were compiled. Multiple statistical tests were performed, including multivariable linear or logistic regression models, while controlling for BTS, age, and sex.

Results

In total, 99 patients were included with a mean age of 29 ± 9.9 years; 62 (62.6%), were female. Forty patients (40.4%) had a BTS ≥4. Female patients (P < .001) and younger patients (26.7 vs 30.9 years, P = .030) were more likely to have a BTS ≥4. Male patients had significantly thicker superior capsules (3.4 mm vs. 2.8 mm, P = .034). BTS was not associated with capsular thickness when controlling for sex. On CT, femoral version (18.9° vs 11.4°, P < .001), and McKibben index (37.8° vs. 28.2°, P < .001) were significantly greater in those with a BTS ≥4. Patients with a BTS ≥4 had more hip internal rotation at 90° of flexion (15.0° vs 10.0°, P < .001), when prone (30.0° vs 20.0°, P = .004), and in extension (10.0° vs. 5.0°, P < .001).

Conclusions

All female patients, regardless of Beighton score, and all patients with a BTS ≥4 indicated for primary hip arthroscopy for femoroacetabular impingement syndrome with or without dysplasia were more likely to have thinner superior hip capsules on MRI and greater hip internal rotation on exam. Bony morphologic differences exist between sexes and between patients with and without hypermobility, likely contributing to differences in ROM.

Level of Evidence

III, retrospective cohort study.

Rehabilitation for atraumatic shoulder instability in circus arts performers: delivery via telehealth

BACKGROUND

The Watson Instability Program (WIP1) is current best evidence for conservative management of atraumatic shoulder instability, but it is unknown if this program can be effectively delivered via tele-consultation. The purpose of this longitudinal pre-post intervention study was to determine the effects of the WIP1 on patient-reported outcome measures, scapular position, shoulder strength, and handstand stability in student circus performers with atraumatic shoulder instability when delivered via tele-consultation.

METHODS

Student circus performers aged between 15 and 35 years from the National Institute of Circus Arts were recruited. A 12-week shoulder exercise program was delivered via tele-consultation during the Melbourne, Australia COVID-19 (coronavirus disease 2019) lockdown. The primary outcome measures were the Western Ontario Shoulder Instability Index score and the Melbourne Instability Shoulder Scale score. Secondary outcomes measures included the Orebro Musculoskeletal Pain Questionnaire, the Tampa Scale for Kinesiophobia, and physical assessment measures including strength via handheld dynamometry, scapular position using an inclinometer, and handstand stability via center-of-pressure fluctuation. Patient-reported outcomes were collected at baseline and 6-week, 12-week, 6-month, and 9-month time points, and physical outcomes were measured at baseline and 9-month time points. A repeated-measures mixed model (with effect sizes [ESs] and 95% confidence intervals [CIs]) was used to analyze patient-reported outcomes, handstand data, strength, and scapular measures. Significance was set at P < .05.

RESULTS

Twenty-three student circus arts performers completed the study. Significant improvements were found in both Western Ontario Shoulder Instability Index scores (effect size [ES], 0.79 [95% CI, 0.31-1.33] at 6 weeks; ES, 1.08 [95% CI, 0.55-1.6] at 12 weeks; ES, 1.17 [95% CI, 0.62-1.78] at 6 months; and ES, 1.31 [95% CI, 0.74-1.95] at 9 months; P < .001) and Melbourne Instability Shoulder Scale scores (ES, 0.70 [95% CI, 0.22-1.22] at 6 weeks; ES, 0.83 [95% CI, 0.34-1.37] at 3 months; ES, 0.98 [95% CI, 0.46-1.54] at 6 months; and ES, 0.98 [95% CI, 0.43-1.50] at 9 months; P < .001), as well as Orebro Musculoskeletal Pain Questionnaire scores at all follow-up time points. The Tampa Scale for Kinesiophobia scores reached significance at 6 weeks and 12 weeks. Following rehabilitation, we found statistically significant increases in shoulder strength in all positions tested and increased scapular upward rotation measured at end-of-range abduction, as well as during loaded external rotation. The affected arm showed greater instability than the unaffected arm with a significant intervention effect on the affected arm showing a greater consistent anterior-posterior movement pattern.

CONCLUSION

In a group of circus performers with atraumatic shoulder instability, treatment with the WIP1 via telehealth resulted in clinically and statistically significant improvements in shoulder symptoms and function.

Association between the Beighton Score and Stress Ultrasonographic Findings of the Anterior Talofibular Ligament in Healthy Young Women: A Cross-Sectional Study

The Beighton score (BS) is widely used to evaluate generalized joint laxity. However, the association between the BS and lateral ankle laxity is unclear. This study compared the ultrasonographic (US) findings of the anterior talofibular ligament (ATFL) between high- (≥6) and low- (≤3) BS groups of healthy young women. The ATFL lengths of healthy young women were measured in the stress and nonstress positions using the previously reported technique from March 2021 to January 2022. The ATFL ratio (ratio of stress to nonstress ATFL length) was used as an indicator of lateral ankle laxity. The anterior drawer test (ADT) was performed. The correlation between the BS and US findings was also examined. A total of 20 (high-BS group) and 61 (low-BS group) subjects with a mean age of 23.8 ± 1.0 years were included. The high-BS group showed a higher grade of ADT than the low-BS group. No significant differences were found in the nonstress and stress ATFL lengths and ATFL ratio (1.10 ± 0.05 vs. 1.09 ± 0.05, p = 0.19) between the groups. No correlation was found between the BS and US findings. In conclusion, this study did not detect significant differences in the US findings of the ATFL between the high- and low-BS groups.

The Relationship Between Generalised Joint Hypermobility and Autism Spectrum Disorder in Adults: A Large, Cross-Sectional, Case Control Comparison

Autism spectrum disorder (ASD) and generalised joint hypermobility (GJH) share a number of clinical manifestations including proprioceptive impairment, motor difficulties, sensory hypersensitivity, and autonomic dysfunction. Clinical observations suggest that GJH is overrepresented in ASD. However, there are currently few systematic studies available. Knowledge about comorbidities may unfold common aetiopathological pathways underlying the association and improve the clinical management. The aim of this large, cross-sectional comparative study is to evaluate the relationship between ASD and GJH in adults. Data on joint hypermobility, symptoms associated with both hypermobility spectrum disorders (HSD) and hypermobile Ehlers-Danlos syndrome (hEDS), lifetime psychiatric diagnoses, psychiatric rating scales for ASD and attention deficit hyperactivity disorder (ADHD), and socio-demographics was collected for 199 individuals with ASD and 419 non-ASD community controls. Logistic regression models adjusting for covariates (age, sex, ethnicity) revealed a significant relationship between ASD and GJH and between ASD and symptomatic GJH, with adjusted odds ratios of 3.1 (95% CI: 1.9, 5.2; p < 0.001) and 4.9 (95% CI: 2.6, 9.0; p < 0.001), respectively. However, the high prevalence of comorbid ADHD in the study sample reduces the generalizability of the results among individuals with ASD without comorbid ADHD. Possibly, an additional ADHD phenotype is the primary driver of the association between ASD and GJH. Furthermore, GJH with additional self-reported symptoms, suggestive of HSD/hEDS, showed a stronger association with ASD than did non-specified GJH, indicating that symptomatic GJH plays a greater role in the relationship than non-specified GJH does. Therefore, the current study underscores the need of careful sample subclassifications. ASD with GJH may represent a novel subgroup of ASD in terms of aetiopathology and clinical presentation. Future research should elucidate the aetiological factors behind the association between ASD and GJH and evaluate how the comorbidity of GJH affects ASD outcomes.

High return to sports and return to work rates after anatomic lateral ankle ligament reconstruction with tendon autograft for isolated chronic lateral ankle instability

PURPOSE

To evaluate clinical outcomes as well as return to sports (RTS) and return to work (RTW) rates following anatomic lateral ankle ligament reconstruction with a tendon autograft for chronic lateral ankle instability (CLAI) in a high-risk population, and to compare these outcome parameters between patients having received a gracilis tendon autograft (GT) and free split peroneus brevis tendon (PBT) autograft.

METHODS

Twenty-eight consecutive patients, who were diagnosed with CLAI, presenting with ≥ 1 risk factor (ligamentous hyperlaxity, insufficient substance of native ligament and/or high-demand athlete), who underwent ankle ligament reconstruction with a tendon autograft between January 2011 and December 2018, were included in this retrospective study. At 63.7 ± 28.0 months (24-112), 23 patients with a mean age of 29.7 ± 10.9 years were available for follow-up. The Karlsson Score, the Foot and Ankle Outcome Score (FAOS), the Tegner Activity Scale and the visual analog scale (VAS) for pain were collected at a minimum follow-up of 24 months. RTS and RTW were evaluated by questionnaire. A subgroup analysis with regard to the graft used for ankle ligament reconstruction (GT versus PBT) was performed.

RESULTS

Patients reported a Karlsson score of 82.1 ± 17.5 (37-100), a FAOS score of 87.8 ± 8.4 (73-99), a median Tegner activity scale of 5.0 (IQR 4-6) and a VAS for pain of 0.5 ± 0.9 (0-4) at rest and of 2.0 ± 2.1 (0-7) during activities at final follow-up. Postoperatively, 96% of patients had returned to sports after 8.3 ± 6.2 months. All patients (100%) had returned to work at 3.5 ± 5.7 (0-24) months, with 87% reporting an equal or improved working ability compared to that preoperatively. Postoperatively, exercise hours per week were significantly reduced compared to preoperatively in patients with a split PBT (n = 12; 13.0 ± 12.9 to 5.6 ± 6.4 h, p = 0.038) autograft as opposed to patients with a GT autograft (n = 11; 13.1 ± 8.7 to 12.4 ± 7.1 h, n.s.). No other group differences were observed.

CONCLUSION

Good patient-reported outcomes as well as excellent RTS and RTW rates can be achieved in high-risk patients undergoing ankle ligament reconstruction with a tendon autograft for CLAI. These results may be helpful in preoperatively managing patients' expectations regarding sports- and work-related outcomes and provide tangible data on the expectable time frame of the individual return to sports and work trajectory.

LEVEL OF EVIDENCE

IV.

Physician practices in evaluation and treatment of patients with generalized joint hypermobility and bleeding

The association between bleeding and joint hypermobility may not be as diagnostically obvious in patients with milder connective tissue disorders. We surveyed members of the Hemostasis and Thrombosis Research Society regarding their knowledge, evaluation, and management practices in patients with generalized hypermobility spectrum disorder/hypermobile Ehlers-Danlos syndrome (hEDS) and bleeding symptoms. The objectives of this study were to (1) evaluate hematologists' diagnosis and management practices for patients with bleeding symptoms and generalized hypermobility spectrum disorder/hEDS and (2) determine future education and research priorities regarding bleeding symptoms within this population. Evaluate hematologists' diagnosis and management practices for patients with bleeding symptoms and generalized hypermobility spectrum disorder/hEDS. Determine future education and research priorities regarding bleeding symptoms within this population. A web-based survey was sent to Hemostasis and Thrombosis Research Society physician members. Physician demographics, preferred evaluation for hEDS, management of bleeding episodes, and referral patterns were collected and descriptive statistics were performed. Only two-thirds of respondents reported evaluating for hypermobility, despite all respondents being aware of the association with bleeding. There were significant variations in referral patterns for genetic counseling, diagnostic evaluation, and management of nonhematologic symptoms. There were also significant variations in reported medical homes for this patient population. Research prioritization included understanding the evolution of bleeding symptoms with age in this population as well as the development of functional tests to identify the molecular mechanism of bleeding and the development of novel hemostatic agents for this population. Results from 33 respondents show differing physician practices regarding the evaluation and management of bleeding in hypermobile patients. Many physicians suggested further research priorities to include studying the natural history of the disease and development of functional diagnostic testing as well as targeted therapeutic options in this patient population.

Outcome measures for assessing change over time in studies of symptomatic children with hypermobility: a systematic review

Background

Generalised joint hypermobility (GJH) is highly prevalent among children and associated with symptoms in a fifth with the condition. This study aimed to synthesise outcome measures in interventional or prospective longitudinal studies of children with GJH and associated lower limb symptoms.

Methods

Electronic searches of Medline, CINAHL and Embase databases from inception to 16th March 2020 were performed for studies of children with GJH and symptoms between 5 and 18 years reporting repeated outcome measures collected at least 4 weeks apart. Methodological quality of eligible studies were described using the Downs and Black checklist.

Results

Six studies comprising of five interventional, and one prospective observational study (total of 388 children) met the inclusion criteria. Interventional study durations were between 2 and 3 months, with up to 10 months post-intervention follow-up, while the observational study spanned 3 years. Three main constructs of pain, function and quality of life were reported as primary outcome measures using 20 different instruments. All but one measure was validated in paediatric populations, but not specifically for children with GJH and symptoms. One study assessed fatigue, reporting disabling fatigue to be associated with higher pain intensity.

Conclusions

There were no agreed sets of outcome measures used for children with GJH and symptoms. The standardisation of assessment tools across paediatric clinical trials is needed. Four constructs of pain, function, quality of life and fatigue are recommended to be included with agreed upon, validated, objective tools.

Advances in assessment of hypermobility-related disorders

There has been increasing recognition in recent years of the prevalence and impact of symptoms which extend beyond the musculoskeletal system on the lives of people with hypermobility-related disorders. This has led researchers to develop more comprehensive assessment tools to help direct and monitor treatment. This article presents some of the latest assessment and diagnostic developments and their implications for practice from a physical therapy perspective.

Lateral Ligament Reconstruction With Hamstring Graft for Ankle Instability: Outcomes for Primary and Revision Cases

BACKGROUND

Optimal treatment for patients with severe ankle instability or failed previous ankle stabilization is not well defined, and newer techniques have limited presence in the literature.

PURPOSE/HYPOTHESIS

The purpose of this study was to evaluate clinical and radiographic outcomes after modified anatomic lateral ligament reconstruction using hamstring auto- or allograft in primary cases versus revision cases. We hypothesized that patients undergoing a revision procedure would demonstrate inferior patient-reported and radiographic outcomes.

STUDY DESIGN

Cohort study; Level of evidence, 3.

METHODS

Patients who underwent modified anatomic lateral ligament reconstruction by a single surgeon between 2010 and 2017 were identified. Indications included failure of previous ankle stabilization or severe ankle laxity. Patients completed preoperative and minimum 1-year postoperative Foot and Ankle Outcome Score (FAOS) surveys. They also underwent pre- and postoperative stress radiographs using the Telos Stress Device.

RESULTS

A total of 41 patients (42 ankles) were identified. The mean age was 32.1 years, and 36 patients (88%) were women. There were 25 primary procedures and 17 revision procedures. Hamstring autograft was utilized in 35 ankles and hamstring allograft in 7 ankles. A total of 34 patients (83%) provided postoperative patient-reported outcome scores at a mean of 26 months (range, 12-65 months). When comparing primary versus revision procedures, revision patients had significantly lower FAOS Pain (77.14 vs 90.66; P = .009), Sports (63.46 vs 82.16; P = .008), and Quality of Life (53.53 vs 76.70; P = .002) scores. In total, 34 patients (83%) had stress radiographs at a mean of 14 months (range, 3-62 months) postoperatively. Revision patients also had lower, though statistically insignificant, postoperative talar tilt measurements on average (5.73° vs 7.10°; P = .252), and pre- to postoperative change in talar tilt was not significantly different between groups (-4.94° vs -7.03°; P = .415).

CONCLUSION

Revision procedures had significantly lower postoperative patient-reported outcome scores and lower talar tilt compared with patients undergoing a primary procedure, although the pre- to postoperative change in the talar tilt was not significantly different between groups.

Correlates of night-time and exercise-associated lower limb cramps in healthy adults

INTRODUCTION/AIMS

We explored correlates of night-time and exercise-associated lower limb cramps in participants of the 1000 Norms Project.

METHODS

A volunteer community sample of healthy people aged ≥18 y underwent assessment of motor function and physical performance, and were questioned about muscle cramps in the previous 3 mo.

RESULTS

Of 491 (221 female) participants age 18-101 y (mean: 59.12; SD: 18.03), about 1 in 3 experienced night-time lower limb cramps, and about 1 in 4 experienced exercise-associated lower limb cramps. For night-cramps, a one unit increase in Beighton score (greater whole-body flexibility) was associated with a 31% reduced odds of cramps (odds ratio [OR] = 0.69, 95% confidence interval [CI]:0.45, 0.99) and passing all three lesser-toe strength tests was associated with 50% reduced odds of cramps (OR = 0.50, 95% CI: 0.32, 0.78). For exercise-associated cramps, participants in the fourth (lowest arch) quartile of Foot Posture Index were 2.1 times (95% CI: 1.11, 3.95) more likely to experience cramps than participants in the first (highest arch) quartile. Odds of experiencing both types of cramps versus no cramps were lower with passing all three lesser-toe strength tests (OR = 0.40, 95% CI: 0.19, 0.85) and better performance in the six-minute walk test (OR = 0.997, 95% CI: 0.996, 0.998).

DISCUSSION

People who experienced both exercise-associated and night-time cramps were less functional. The association between night-time cramps with less whole-body flexibility and reduced lesser-toe flexor strength should be explored to determine causation. Planovalgus (low-arched) foot type was independently associated with exercise-associated cramps. The effectiveness of foot orthoses for secondary prevention of exercise-associated cramps in people with low-arched feet should be explored.

Joint hypermobility in athletes is associated with shoulder injuries: a systematic review and meta-analysis

BACKGROUND

Joint hypermobility in athletes is associated with increased risk of knee injuries, but its role in relation to shoulder injuries has not been scrutinized. Therefore, our aim was to synthesize the evidence on the association between joint hypermobility and shoulder injuries in athletes.

METHODS

Data sources were MEDLINE, CINAHL, EMBASE, and SPORTDiscus from inception to 27th February 2021. Eligibility criteria were observational studies of athletes (including military personnel), mean age ≥ 16 years, and with a transparent grouping of those with and without joint hypermobility. A broad definition of joint hypermobility as the exposure was accepted (i.e., generalised joint hypermobility (GJH), shoulder joint hypermobility including joint instability). Shoulder injuries included acute and overuse injuries, and self-reported pain was accepted as a proxy for shoulder injuries. The Odds Ratios (OR) for having shoulder injuries in exposed compared with non-exposed athletes were estimated using a random effects meta-analysis. Subgroup analyses were performed to explore the effect of sex, activity type, sports level, study type, risk of bias, and exposure definition. Risk of bias and the overall quality of evidence were assessed using, respectively, the Newcastle-Ottawa Scale and the Grading of Recommendations Assessment, Development and Evaluation (GRADE).

RESULTS

Among 6207 records, six studies were included with 2335 (range 118-718) participants (34.1% females; athlete mean age 19.9 years). Athletes with joint hypermobility were more likely to have shoulder injuries compared with athletes without joint hypermobility (OR = 3.25, 95% CI 1.64, 6.43, I2 = 75.3%; p = 0.001). Exposure definition (GJH, OR = 1.97, 95% CI 1.32, 2.94; shoulder joint hypermobility, OR = 8.23, 95% CI 3.63, 18.66; p = 0.002) and risk of bias (low, OR = 5.25, 95% CI 2.56, 10.8; high, OR = 1.6, 95% CI 0.78, 3.29; p = 0.024) had large impacts on estimates, while the remaining subgroup analyses showed no differences. The overall quality of evidence was low.

CONCLUSION

Joint hypermobility in athletes is associated with a threefold higher odds of having shoulder injuries, highlighting the need for prevention strategies in this population. However, due to low quality of evidence, future research will likely change the estimated strength of the association.

PROTOCOL REGISTRATION

Open Science Framework registration osf.io/3wrn9.

Generalized joint hypermobility and risk of pelvic girdle pain in pregnancy: does body mass index matter?

Background: Women with generalized joint hypermobility may be at increased risk of pregnancy-related pelvic girdle pain, but evidence is inconclusive. Objectives: In this prospective cohort study of 283 pregnant women in Norway, we aimed to study the association of generalized joint mobility with pelvic girdle pain, and to evaluate if pre-pregnancy body mass index was a modifier of the association. Methods: Generalized joint hypermobility was defined as a score of ≥5/9 positive tests on the Beighton score measured in early pregnancy. Primary outcome was evening pain intensity in gestation week 30, measured by a 100 mm visual analogue scale. We applied linear regression analyses to estimate age-adjusted unstandardized beta coefficients. Results: Evening pain intensity was similar among women with Beighton score ≥ 5/9 and women with Beighton score < 5/9 (age-adjusted mean difference 2.8 mm; 95% CI: -9.2 to 14.9 mm). Women with Beighton score ≥ 5/9 and pre-pregnancy body mass index ≥ 25 kg/m², reported higher evening pain than women with Beighton score < 5/9 and pre-pregnancy body mass index <25 kg/m² (age-adjusted mean difference 28.7 mm; 95% CI: 14.3-43.1 mm). Conclusions: Overall, evening pain intensity was similar among pregnant women with and without generalized joint hypermobility. However, women with a combination of generalized joint hypermobility and body mass index ≥25 kg/m² reported higher evening pain compared to women with normal joint mobility and body mass index <25 kg/m², suggesting that body mass index may modify the association. The estimates could be imprecise due to the small study sample, and our findings should be interpreted with caution.

Clinically Reliable Knee Flexion Angle Measured on Stress Radiography for Quantifying Posterior Instability in Posterior Cruciate Ligament Injury

Background

After posterior cruciate ligament injury, stress radiography is a common method of quantifying posterior instability, defined as the side-to-side difference in posterior tibial displacement (PTD) between the injured knee and contralateral noninjured knee. However, no study has evaluated the reliability of PTD according to knee flexion angle (KFA) measurements on stress radiographs.

Purpose

To evaluate the test-retest reliability of stress radiographic measurements of the KFA in the noninjured knee. In addition, we established a reliable range of KFAs to indicate posterior instability by comparing results with the instability measured at 90° KFA, which is considered the gold standard.

Study Design

Cohort study (diagnosis); Level of evidence, 3.

Methods

We evaluated patients who had undergone bilateral stress radiographic examinations at least 5 times for ligament injuries between January 2013 and November 2019. All examinations were performed on a Telos device with a 150-N posterior load. A total of 120 knees and 644 stress radiographs were enrolled. We measured the KFA and PTD on stress radiographs and evaluated the reliability of repeated PTD measurement and the correlation between KFA and PTD.

Results

The distribution of the actual noninjured knee KFA ranged from 56.9° to 106.7°. Among the 644 radiographs, 155 (24.1%) showed KFAs between 85° and 95°, and 287 (44.6%) showed KFAs between 80° and 85°. A significant correlation was found between KFA and PTD (P < .001), and the intrapatient intraclass correlation coefficient (ICC) was 0.788. A KFA range of 85° to 92° satisfied the criteria of high ICC (0.885) and nonsignificant correlation between KFA and PTD (P = .055) and thus was considered a reliable range of KFAs for quantifying posterior instability. We found no significant risk factors for measurement error, including age (P = .674), sex (P = .328), height (P = .957), weight (P = .248), or body mass index (P = .257).

Conclusion

We found high reproducibility of posterior displacement measurements on Telos stress radiography at a KFA of 85° to 92° in noninjured knees.

The Beighton Score as a measure of generalised joint hypermobility

The Beighton Score (BS) is a set of manoeuvres in a nine-point scoring system, used as the standard method of assessment for Generalised Joint Hypermobility (GJH). It was originally developed as an epidemiological tool used in screening large populations for GJH, but later adopted as a clinical tool for diagnostic purposes. Its ability to truly reflect GJH remains controversial, as joints within the scoring system are predominantly of the upper limb and disregard many of the major joints, preventing a direct identification of GJH. Furthermore, a consistent finding in the literature whereby the BS failed to identify hypermobility in joints outside the scoring system suggests its use as an indirect indicator of GJH is also not viable. As such, the collective findings of this review demonstrate a need for a change in clinical thinking. The BS should not be used as the principle tool to differentiate between localised and generalised hypermobility, nor used alone to exclude the presence of GJH. Greater emphasis should be placed on a clinician’s judgement to identify or exclude GJH, according to its full definition.