Relationships among head posture, pain intensity, disability and deep cervical flexor muscle performance in subjects with postural neck pain

Prevalence and associated risk factors of musculoskeletal disorders among information technology (IT) professionals: A systematic review

Musculoskeletal disorders (MSDs) are a growing concern among information technology (IT) professionals. Understanding the specific risk factors associated with MSDs among employers, occupational health practitioners, and IT professionals may reveal effective preventive measures. The aim of this study was to examine the prevalence and identify the risk factors associated with MSDs among IT professionals. A comprehensive literature search was conducted on several databases, including PubMed, Scopus, ScienceDirect, ProQuest, Online Library Wiley, Springer, Web of Science, and manual searches to identify relevant studies published between 2013 and 2023. The search strategy employed appropriate keywords related to IT professionals, musculoskeletal disorders, prevalence, and risk factors. Two reviewers independently assessed each article using PRISMA guidelines and the Joanna Briggs Institute's (JBI) Critical Appraisal Checklist for Prevalence Data. Data extraction was performed, and a narrative synthesis was conducted to summarize the findings. Our search yielded a total of 1159 records, with 13 studies finally included in this review. The selected studies were from several countries and contained a total of 4632 participants. The prevalence of MSDs was reported with a maximum rate of 89% and a minimum rate of 20%, reflecting the overall percentage of affected individuals and including data on specific body areas affected. Identified risk factors from the selected studies include work duration, experience, sex, strenuous back positions, smoking, physical inactivity, MSD history, uncomfortable workstation setting, mental stress, insufficient sleep, body posture, exercise status, alcohol consumption, prolonged sitting, workspace, job demands, overexertion, breaks during work, and excessive usage of smartphones.

Effects of acupuncture at myofascial trigger points combined with sling exercise therapy on clinical recovery and cervical spine biomechanics in patients with cervical spondylotic radiculopathy

OBJECTIVE

This research aimed to ascertain the effects of acupuncture at myofascial trigger points (MTrPs) in combination with sling exercise therapy (SET) on the clinical recovery and cervical spine biomechanics in patients with cervical spondylotic radiculopathy (CRS).

METHODS

Eighty patients with CSR were divided into Group A and Group B. Group A was treated with acupuncture at MTrPs, and Group B was treated with acupuncture at MTrPs combined with SET. The cervical spine function, pain level, cervical spine biomechanics and the occurrence of complications were compared between the two groups before and after treatment.

RESULTS

After treatment, the Japanese Orthopaedic Association scores, Clinical Assessment Scale for Cervical Spondylosis scores, cervical forward flexion angle, posterior extension angle, left lateral flexion angle, right lateral flexion angle, left lateral rotation angle, and right lateral rotation angle of the Group B were raised, and the Neck Disability index, Visual Analogue Scale scores, and Neck Pain Questionnaire scores were reduced versus those of the Group A. The difference in complication rates between the two groups was not of statistical significance.

CONCLUSION

Acupuncture at MTrPs combined with SET promotes functional recovery of the cervical spine, reduces pain, and improves cervical spine biomechanics in patients with CRS.

Do Temporomandibular Disorder Patients with Joint Pain Exhibit Forward Head Posture? A Cephalometric Study

Purpose

To evaluate head and cervical posture in individuals with or without temporomandibular disorders (TMDs) and to assess the correlations between pain, severity of symptoms, and posture.

Methods

A total of 384 patients (129 males and 255 females) was included. The Fonseca Anamnestic Index (FAI) was used to assess the severity and prevalence of TMD and the presence of temporomandibular joint (TMJ) pain. Patients were divided into three groups: the TMD-free group, TMD without TMJ pain group, and TMD with TMJ pain group. Subsequently, the patients with TMJ pain were further divided into mild TMD and moderate/severe TMD groups. Nine parameters were traced on cephalograms to characterize the head and cervical posture.

Results

TMD patients with TMJ pain showed increased forward head posture (FHP) than patients without TMJ pain and TMD-free subjects. No significant difference was observed between the TMD patients without TMJ pain and TMD-free subjects. In the TMD patients with the TMJ pain group, the moderate/severe TMD patients demonstrated increased FHP compared to mild TMD patients. TMD patients with joint pain had greater CVT/RL (B = 3.099), OPT/RL (B = 2.117), and NSL/C2' (B = 4.646) than the patients without joint pain after adjusting for confounding variables (P < 0.05).

Conclusion

TMD patients with TMJ pain showed increased FHP compared to other groups, and FHP became more significant as TMD severity increased in male patients, indicating the FHP might play an important role in the development of TMJ pain. In the clinical assessment of TMD, the patients' abnormal head and cervical posture might be considered.

Is Neck Pain Related to Sagittal Head and Neck Posture?: A Systematic Review and Meta-analysis

Background

Neck pain (NP) is common in all age groups and adversely affects the patients' entire lifestyle. There exists inconclusive evidence relating faulty craniocervical posture with pain-related disability. This review aims to determine whether sagittal head and neck posture differs in NP and pain-free subjects, to critically appraise the correlation of posture with NP.

Methods

Of 3796 articles identified at primary search from CINAHL, PubMed, Google Scholar, EMBASE, 26 were included based on eligibility criteria. Mean pooled difference (MPD) and effect size (ES) were calculated to establish relationship among studies, to assess postural correlation with NP measures [Visual Analogue Scale (VAS), Numeric Pain Rating Scale (NPRS), neck disability index (NDI), Northwick Park NP Questionnaire (NPQ)] and for age- and gender-wise variation. Risk of bias was assessed using Newcastle-Ottawa Quality Assessment Scale.

Results

Craniovertebral angle (CVA) had a significant MPD of - 2.93(95% CI - 4.95 to - 0.91). Sagittal head angle (SHA) and forward head posture (FHP) had an insignificant MPD of 1.15 (95% CI - 1.16 to 3.46) and - 0.26 (95% CI - 1.89 to 1.36), respectively. Age- and gender-wise CVA difference was found to be 2.36° and 2.57°, respectively. ES was significant for correlation between CVA and pain intensity [NPRS: - 0.44 (95% CI - 0.61 to - 0.26); VAS: - 0.31 (95% CI - 0.46 to - 0.16)], and between CVA and disability [NDI: - 0.18 (95% CI - 0.31 to - 0.05); NPQ: - 0.47 (95% CI - 0.61 to - 0.320)].

Conclusion

CVA differs for age, gender, and pain vs pain-free subjects, and correlates negatively with NP measures. Other surrogate measures (SHA, cranial and cervical angles, FHP) warrant further research.

PROSPERO Registration

PROSPERO 2021 CRD42021275485.

Changes in deep neck muscle length from the neutral to forward head posture. A cadaveric study using Thiel cadavers

Forward head posture (FHP) is one of the most common postural deviations. Deep neck muscle imbalance of individuals with FHP is of primary concern in clinical rehabilitation. However, there is scarce quantitative research on changes in deep neck muscle length with the head moving forward. This study aimed to investigate changes in deep neck muscle length with different severity levels of FHP. Six Thiel‐embalmed cadavers (four males and two females) were dissected, and 16 deep neck muscles in each cadaver were modeled by a MicroScribe 3D Digitizer in the neutral head posture, slight FHP, and severe FHP. The craniovertebral angle was used to evaluate the degrees of FHP. Quantitative length change of the deep neck muscles was analyzed using Rhinoceros 3D. In slight FHP significant changes in length occurred in four muscles: two shortened (upper semispinalis capitis, rectus capitis posterior minor) and two lengthened (longus capitis, splenius cervicis). In severe FHP all occipital extensors were significantly shortened (10.6 ± 6.4%), except for obliquus capitis superior, and all cervical extensors were significantly lengthened (4.8 ± 3.4%), while longus capitis (occipital flexor) and the superior oblique part of the longus colli (cervical flexor) were lengthened by 8.8 ± 3.8% and 4.2 ± 3.1%, respectively. No significant length change was observed for the axial rotator. This study presents an alternate anatomical insight into the clinical rehabilitation of FHP. Six muscles appear to be important in restoring optimal head posture, with improvements in FHP being related to interventions associated with the occipital and cervical extensors.

Efficacy of Deep Cervical Flexor Muscle Training on Neck Pain, Functional Disability, and Muscle Endurance in School Teachers: A Clinical Trial

Background

Neck pain (NP) is a common work-related disorder, with high prevalence in the profession of teaching. The daily duties of a school teacher involve head-down postures while reading and writing, which expose them to the risk of developing NP. Deep cervical flexor (DCF) muscles have been reported to have lower endurance in patients with cervical impairment, which has additionally been associated with disability. There is limited evidence regarding the efficacy of training of DCF muscles in occupational NP. The objective of this study was to investigate the effects of DCF muscle training on pain, muscle endurance, and functional disability using pressure biofeedback in school teachers with NP.

Methods

Sixty-five teachers (age, 25-45 years) with more than 5 years of teaching experience participated in this study. They were randomly divided into two groups: the experimental (E) and control (C) groups. In the E group, the subjects underwent DCF muscle training using pressure biofeedback in addition to conventional exercises for neck pain, while those in the C group underwent conventional exercises only. Pain, muscle endurance, and disability were measured at day 0 (before the treatment) and days 14 and 42 after the treatment. Endurance of DCF muscles was measured by the craniocervical flexion test using pressure biofeedback, pain intensity was measured using the numeric pain rating scale, and functional disability was assessed using the neck disability index questionnaire. This study was performed in accordance with CONSORT guidelines.

Results

On day 0, there were no significant differences in the age, pain, muscle endurance, and disability levels between the groups. After initiating the intervention, although there were improvements in both groups, there was a statistically significant improvement in muscle endurance, pain, and disability in subjects who received additional training with pressure biofeedback.

Conclusions

Besides increasing muscle endurance, specific training of DCF muscles in addition to conventional exercises can improve neck pain and functional disability. These results should be further correlated clinically. A dedicated time for exercises at school could help prevent the development of NP in teachers. This trial is registered with ClinicalTrials.gov NCT03537300 May 24, 2018 (retrospectively registered).

Interaction between Pain, Disability, Mechanosensitivity and Cranio-Cervical Angle in Subjects with Cervicogenic Headache: A Cross-Sectional Study

The relationship between the forward head posture and mechanosensitivity in subjects with a cervicogenic headache (CGH) remains uncertain. The aim of the study was to evaluate if there was a relationship between the tissue mechanosensitivity and cranio-cervical angle (CCA) that was moderated by pain intensity and/or disability in subjects with CGH. A convenience sample of 102 subjects was recruited. The CCA was measured with photographs, using a postural assessment software. The pain intensity was measured with a visual analogue scale (VAS), and the disability was measured with the Northwick Park Questionnaire. The pressure pain threshold (PPT) was measured at the spinous process of C2, the upper trapezius and splenius capitis muscles, and the median nerve. Simple moderation multiple regression analyses were constructed. There was a positive relationship between PPT at C2 and CCA, but a nonsignificant relationship for the PPT measured at the muscles and median nerve. The effect of PPT at C2 over CCA was moderated by pain intensity (R² = 0.17; R² change = 0.06; p < 0.05) but not disability. The Johnson–Neyman analysis revealed a cut-off point for the statistical significance of 4.66 cm in VAS. There seems to be a positive relationship between PPT at C2 and CCA, which is positively moderated by pain intensity in subjects with CGH.

Effect of a Long Exercise Program in the Reduction of Musculoskeletal Discomfort in Office Workers

The purpose of this study was to assess the effect of a six week exercise program to reduce the muscle tone of the trapezius and musculoskeletal discomfort (MED) of office workers. Twenty-six workers performed an exercise program based on: (1) stretching of cervical and/or dorsal region; (2) joint mobility of shoulders and rachis; (3) strengthening deep stabilizer and core muscles; and (4) scapula stabilizing exercises. A Myoton device was used to evaluate trapezius tone and the Cornell Musculoskeletal Discomfort Questionnaire was used to assess changes in MED at three points of evaluation: at the beginning (Pre_1) and at the end of the workday (Post_1), and after the training program (Pre_2). The Wilcoxon test and Cohen’s d were performed to examine differences and effect sizes between evaluations. Main results show that trapezius tone remained constant during the workday, but decreased in the dominant upper trapezius (p = 0.003, ES = −0.60) and increased in the non-dominant middle trapezius (p = 0.016, ES = 0.45) after the exercise program, which eliminated significant muscle asymmetries. MED significantly decreased in the neck (p = 0.027, ES = −0.60) and upper back (p = 0.046, ES = −0.67). In conclusion, MED appears to improve in office workers after a six week training program, which may be explained by a decrease in trapezius tone and increase in the left middle trapezius tone.

Do changes in psychosocial factors, lifestyle factors and sitting posture influence the likelihood of musculoskeletal pain in high school computer users?

OBJECTIVES

Adolescents regularly engage in screen-based activities. Complex factors influence adolescents' growth, and habitual sitting posture. The association between over-time changes in their sitting posture, and upper quadrant musculoskeletal pain (UQMP) is poorly understood. This study tested the association between change over 12 months in seated posture angles (neck flexion [NF]; craniocervical angle [CCA] into flexion and extension; and thoracic flexion [TF]), UQMP, and predictor variables (anxiety and depression; sport activity, music participation; computer use).

METHODS

A one-year prospective longitudinal study enrolled 211 asymptomatic 15-18-year students. 3D motion analysis captured postural angles while students worked on desktop computers, at baseline and 12 months later. Height, weight, computing time, sport and music participation, and depression and anxiety were measured at both time periods. UQMP in the previous month was captured at 12 months. The association between over-time change in sitting posture angles and predictor variables was determined using linear regression analysis (r² ; p-values). The association between predictor variables with UQMP, and predictor variables on the association between postural angles and UQMP was assessed using logistic regression models (Odds Ratios [95%CI]). Significant confounding effects were determined when the addition of a predictor variable to the posture-UQMP model significantly changed the Likelihood Ratio chi square value.

RESULTS

N = 153 students (72%) completed the study (48 with UQMP). Significant associations occurred between head flexion (HF) and body mass index (BMI) (r²⁼ 4.20, p = .01); NF and computer use (r²⁼ 2.87, p = .036) and CCA and music participation (r²⁼ 9.99, p = .047). Music participants and non-participants in sport or music had increased risk of UQMP with CCA changes into flexion (OR 12.0) and TF changes into extension (OR 7.6) respectively.

CONCLUSION

The association between over-time-change in sitting posture angles and UQMP is not influenced by anthropometrics, psychosocial factors or time spent computing. Music students, and students not participating in sport, require further postural analysis.

Effectiveness of a theory-based back care intervention on spine-related behavior among pupils: a school-based randomised controlled trial (T-Bak study)

Background

Children’s health and welfare have a special place in research and policy in many countries. One of the most important concerns is the increasing rate of backache in children due to many of behavioral risk factors. The aim of this study was to evaluate the effectiveness of an educational program on promoting back-related behavior as well as knowledge, skills, beliefs, and self-efficacy among fifth grade girls.

Methods

The theory-based back care (T-Bak) study was a school-based randomised controlled trial (RCT) that assessed the effectiveness of developing a back care training program based on the social cognitive theory (SCT). A total of 104 schoolchildren aged 11 ± 1.0 years were assigned to intervention (n = 52) and control (n = 52) groups. The intervention group received six sessions training on proper lifting and carrying techniques, having proper posture during daily activities, and correct backpack wearing techniques with a 1-week interval while the control group received nothing. Then, the two groups were assessed for knowledge, skills, self-efficacy, beliefs, and behavior at four points in time: baseline, immediate, three and six-months post-intervention. The changes of the outcomes investigated using univariate repeated measures analysis of variance. Partial eta squared measure (η_p²) was used to calculate effect sizes.

Results

A positive change was found for the intervention group back-related behavior from baseline to immediate post-intervention and follow-ups (F = 78.865, p < 0.001, η_p² = 0.22). Overall there were 36.4% improvement for knowledge (η_p² = 0.21), 53.2% for the skills (η_p² = 0.25), 19.5% for the self-efficacy (η_p² = 0.11), and 25.6% for the beliefs (η_p² = 0.14) scores from baseline to 6 months’ follow-up assessments among the intervention group (p < 0.001). The results also showed a significant interaction effect between group and time.

Conclusion

The T-Bak intervention was effective in improving back-related behavior in pupils. It is now available and could be evaluated further in back-care related studies.

Trial registration

Current Controlled Trials IRCT20180528039885N1, 30th Oct 2018, ‘Prospectively registered’. https://www.irct.ir/trial/31534

The Relationship Between Forward Head Posture and Neck Pain: a Systematic Review and Meta-Analysis

PURPOSE OF REVIEW

Forward head posture (FHP) is the most common cervical postural fault in the sagittal plane that is found with different severity levels in almost all populations. Despite claims that FHP may be related to neck pain, this relation seems to be controversial. Thus, our purpose is to determine whether FHP differs between asymptomatic subjects and those with neck pain and to investigate if there is a relationship between head posture and neck pain.

RECENT FINDINGS

A total of 15 cross-sectional studies were eligible for inclusion for this systematic review and meta-analysis. Ten studies compared FHP between a group of asymptomatic participants and a group of participants with neck pain and an overall mean difference (MD) of 4.84 (95% CI = 0.14, 9.54), indicating a significant between-group difference, contrary to adolescent (MD = - 1.05; 95% CI = - 4.23, 2.12). Eight studies showed significant negative correlations between FHP and neck pain intensity (r = - 0.55; 95% CI = - 0.69, - 0.36) as well as disability (r = - 0.42; 95% CI = - 0.54, - 0.28) in adults and older adults, while in adolescents, only lifetime prevalence and doctor visits due to neck pain were significant predictors for FHP. This systematic review found that age played an important role as a confounding factor in the relation between FHP and neck pain. Also, the results showed that adults with neck pain show increased FHP when compared to asymptomatic adults and that FHP is significantly correlated with neck pain measures in adults and older adults. No association was found between FHP and most of neck pain measures in adolescents.