An endurance-strength training regime is effective in reducing myoelectric manifestations of cervical flexor muscle fatigue in females with chronic neck pain

The effect of craniocervical flexion and neck endurance exercises plus pulmonary rehabilitation on pulmonary function in spinal cord injury: a pilot single-blinded randomised controlled trial

STUDY DESIGN

Randomised controlled trial with computerised allocation, assessor blinding and intention-to-treat analysis.

OBJECTIVE

This study wanted to prove that cervicocranial flexion exercise (CCFE) and superficial neck flexor endurance training combined with common pulmonary rehabilitation is feasible for improving spinal cord injury people's pulmonary function.

SETTING

Taoyuan General Hospital, Ministry of Health and Welfare: Department of Physiotherapy, Taiwan.

METHOD

Thirteen individuals who had sustained spinal cord injury for less than a year were recruited and randomised assigned into two groups. The experimental group was assigned CCFEs and neck flexor endurance training plus normal cardiopulmonary rehabilitation. The control group was assigned general neck stretching exercises plus cardiopulmonary rehabilitation. Lung function parameters such as forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), FEV1/FVC, peak expiratory flow rate (PEFR), inspiratory capacity (IC), dyspnoea, pain, and neck stiffness were recorded once a week as short-term outcome measure.

RESULT

The experimental group showed significant time effects for FVC (pre-therapy: 80.4 ± 21.4, post-therapy: 86.9 ± 16.9, p = 0.021, 95% CI: 0.00-0.26) and PEFR (pre-therapy: 67.0 ± 33.4; post-therapy: 78.4 ± 26.9, p = 0.042, 95% CI: 0.00-0.22) after the therapy course. Furthermore, the experimental group showed significant time effects for BDI (experimental group: 6.3 ± 3.0; control group: 10.8 ± 1.6, p = 0.012, 95% CI: 0.00-0.21).

CONCLUSION

The exercise regime for the experimental group could efficiently increase lung function due to the following three reasons: first, respiratory accessory muscle endurance increases through training. Second, posture becomes less kyphosis resulting increasing lung volume. Third, the ratio between superficial and deep neck flexor is more synchronised.

IRB TRIAL REGISTRATION

TYGH108045.

CLINICAL TRIAL REGISTRATION

NCT04500223.

Effects of exercise combined with cervicothoracic spine self-mobilization on chronic non-specific neck pain

To investigate the short-term effects and differences between exercise alone and exercise combined with self-mobilization training on chronic non-specific neck pain (CNSNP). Thirty subjects who met the criteria were recruited and randomly assigned to the exercise training group, the exercise combined with cervical self-mobilization training group (ECCM), and the exercise combined with cervicothoracic self-mobilization training group (ECCTM). The exercise training group received 6 weeks of deep neck flexor under biofeedback and scapular stability training, and the other two groups received 6 weeks of cervical self-mobilization and cervicothoracic self-mobilization, respectively, in addition to exercise training. Neck pain, cervical range of motion (ROM), neck disability, strength and endurance of deep neck flexor and quality of life were assessed before and after 6 weeks of training. The study results showed that all the three training programs for 6 weeks increased the strength and endurance of deep neck flexor, increased cervical ROM, reduced pain, and improved neck function (P < 0.05). The exercise combined with self-mobilization two groups compared with only the exercise training group had better improvement in ROM of extension, lateral flexion, rotation and quality of life (P < 0.05). Compared with exercise alone and exercise combined with cervical self-mobilization training, the exercise combined with cervicothoracic self-mobilization training was the best in improving ROM of right lateral flexion (exercise training group vs ECCTM: P < 0.01, d = 1.61, ECCM vs ECCTM: P < 0.05, d = 1.14) and pain (exercise training group vs ECCTM: P < 0.05, d = 1.34, ECCM vs ECCTM: P < 0.05, d = 1.23). Deep flexor muscle and shoulder stability training can improve the endurance and strength of the deep flexor muscles of the neck and coordinate the movement patterns of the shoulder and neck. Self-mobilization techniques can promote improvements in cervical lateral flexion and rotation range of motion, alleviate neck disability and further improve quality of life. A combination of exercise and cervicothoracic self-mobilization training appears beneficial for the management of neck pain.

Resistance, Motor Control, and Mindfulness-Based Exercises Are Effective for Treating Chronic Nonspecific Neck Pain: A Systematic Review With Meta-Analysis and Dose-Response Meta-Regression

OBJECTIVE: We aimed to analyze the effects and dose-response relationship of the most effective exercises for improving pain and disability in people with chronic nonspecific neck pain. DESIGN: Intervention systematic review with meta-analysis. LITERATURE SEARCH: We searched the PubMed, PEDro, and CENTRAL databases from their inception to September 30, 2022. STUDY SELECTION CRITERIA: We included randomized controlled trials that involved people with chronic neck pain adopting a longitudinal exercise intervention and assessed one pain and/or disability outcome. DATA SYNTHESIS: Restricted maximum-likelihood random-effects meta-analyses were modeled separately for resistance, mindfulness-based, and motor control exercises; standardized mean differences (Hedge's g, standardized mean difference [SMD]) were effect estimators. Meta-regressions (dependent variable: effect sizes of the interventions; independent variables: training dose and control group effects) were conducted to explore the dose-response relationship for therapy success of any exercise type. RESULTS: We included 68 trials. Compared to true control, effects on pain and disability were significantly larger for resistance exercise (pain: SMD, -1.27; 95% confidence interval [CI]: -2.26, -0.28; |2 = 96%; disability: SMD, -1.76; 95% CI: -3.16, -0.37; |2 = 98%), motor control exercise (pain: SMD, -2.29; 95% CI: -3.82, -0.75; |2 = 98%; disability: SMD, -2.42; 95% CI: -3.38, -1.47; |2 = 94%), and Yoga/Pilates/Tai Chi/Qui Gong exercise (pain: SMD, 1.91; 95% CI:-3.28, -0.55; |2 = 96%; disability: SMD, -0.62; 95% CI: -0.85, -0.38; |2 = 0%). Yoga/Pilates/Tai Chi/Qui Gong exercise was more effective than other exercises (SMD, -0.84; 95% CI: -1.553, -0.13; |2 = 86%) for reducing pain. For disability, motor control exercise was superior to other exercises (SMD, -0.70; 95% CI: -1.23, -0.17; |2 = 98%). There was no dose-response relationship for resistance exercise (R2 = 0.32). Higher frequencies (estimate = -0.10) and longer durations (estimate = -0.11) of motor control exercise had larger effects on pain (R2 = 0.72). Longer sessions (estimate = -0.13) of motor control exercise had larger effects on disability (R2 = 0.61). CONCLUSION: Resistance, mindfulness-based, and motor control exercises were effective for reducing neck pain (very low- to moderate-certainty evidence). Higher frequencies and longer duration of sessions had a significant effect on pain for motor control exercise. J Orthop Sports Phys Ther 2023;53(8):1-41. Epub: 20 June 2023. doi:10.2519/jospt.2023.11820.

A randomized controlled trial on the effects of "Global Postural Re-education" versus neck specific exercise on pain, disability, postural control, and neuromuscular features in women with chronic non-specific neck pain

BACKGROUND

Neck pain is associated with decreased health-related quality of life, decreased work productivity, and increased visits to health care providers.

AIM

The aim of this study was to assess the effectiveness of "Global Postural Re-education" (GPR) versus a neck specific exercise (SE) program on neck pain, disability, cervical range of movement, postural stability, and activity of the superficial cervical flexor muscles.

DESIGN

A parallel-group and single-blinded clinical trial.

SETTING

Community interventions.

POPULATION

Fifty women with non-specific chronic neck pain (NSCNP).

METHODS

Participants were randomly assigned to one of the two intervention groups (GPR [N.=25] or SE [N.=25]). Both interventions consisted of eight sessions of ~40 minutes duration, performed twice a week, for four weeks. Outcomes included neck pain intensity and disability, cervical range of motion (CROM), postural sway, and activity of the superficial neck flexor muscles during a cranio-cervical flexion test (CCFT). All outcomes were assessed twice before the intervention and immediately following eight treatment sessions over four weeks.

RESULTS

Both interventions were equally effective in reducing neck pain (P<0.001, ŋp²=0.770) and disability (P<0.001, ŋp²=0.306), improving neck mobility (P<0.001, 0.385≤ŋp²≤0.623, for all measurements) and decreasing the activity of the superficial cervical flexor muscles (P>0.001). Neither intervention altered postural sway.

CONCLUSIONS

Our results revealed that GPR and SE induced significant positive results in all measures apart from postural stability but with no difference between the interventions.

CLINICAL REHABILITATION IMPACT

"Global Postural Re-education" (GPR) and neck SE interventions are equally effective in reducing neck pain and disability, and improving neck mobility in women with NSCNP. Overall, this study indicates that GPR and SE interventions can be used to effectively manage patients with NSCNP.

Comparison of two different manual techniques for an exercise program for the management of chronic neck pain: A randomized clinical trial study

BACKGROUND

Both spinal manipulation (SM) and Integrated Neuromuscular Inhibition Technique (INIT) have a positive effect in individuals with chronic neck pain (CNP), especially when they are combined with therapeutic exercise (TE). However, it has not been determined which of the above combinations is more effective in patients with CNP.

OBJECTIVE

To compare the efficacy of two different manual techniques (SM and INIT), when combined with the same TE program in the management of CNP.

METHODS

Eighty women with CNP, allocated into four groups of 20 persons each. The first group followed a 10-week TE program, the second TE and INIT, the third TE and SM, and the fourth was the control group. The Visual Analogue Scale (VAS) for pain, Neck Disability Index (NDI), Pressure Pain Threshold (PPT) of the neck muscles, neck active Range of Motion (ROM), Maximum Isometric Strength (MIS) of the neck muscles, craniocervical flexion test (CCFT) and SF-36 questionnaire scores were evaluated before, during and after the treatment period, with a six-month follow-up.

RESULTS

There was between groups differences between the three intervention groups and the control group (p< 05), with the positive effects being maintained until the six-month follow-up. However, this improvement occurred earlier in the "TE + INIT" and "TE + SM" groups than in the "TE" group. Differences between the "TE + INIT" and the "TE + SM" groups were noticed only in the neck muscles PPT values, in which the "TE + INIT" group showed greater improvement. Furthermore, some non-statistically significant indications for further improvement of "TE + SM" were noted in the left lateral flexion ROM.

CONCLUSION

The addition of INIT as well as SM in the same TE program can further increase the beneficial effect of exercise in women with CNP. In most measurements both combinations seem to be equally effective. However, INIT improved more local muscle tenderness, whereas SM aided more in the neck lateral flexion ROM.

Measures of neck muscle strength and their measurement properties in adults with chronic neck pain-a systematic review

BACKGROUND

Measurement of neck muscle strength is common during the assessment of people with chronic neck pain (CNP). This systematic review evaluates the measurement properties (reliability, validity, and responsiveness) of neck muscle strength measures in people with CNP.

DATABASES AND DATA TREATMENT

This systematic review followed a PROSPERO registered protocol (CRD42021233290). Electronic databases MEDLINE (OVID interface), CINAHL, SPORTDiscuss via (EBSCO interface), EMBASE (OVID interface), and Web of Science were searched from inception to 21 June 2021. Screening, data extraction, and quality assessment (Consensus-based Standards for the selection of Health Measurement Instruments (COSMIN) checklist) were conducted independently by two reviewers. The overall strength of evidence was evaluated using the modified Grading of Recommendations Assessment, Development and Evaluation.

RESULTS

From 794 records, nine articles were included in this review which concerned six different neck strength outcome measures. All studies evaluated reliability and one evaluated construct validity. The reliability of neck strength measures ranged from good to excellent. However, the risk of bias was rated as doubtful/inadequate for all except one study and the overall certainty of evidence was rated low/very low for all measures except for the measurement error of a handheld dynamometer.

CONCLUSION

A multitude of measures are used to evaluate neck muscle strength in people with CNP, but their measurement properties have not been fully established. Further methodologically rigorous research is required to increase the overall quality of evidence.

Stabilization of the cervical spine through flexor endurance training for Alice in Wonderland syndrome presenting as an aura of migraine- A case report

BACKGROUND

Alice in Wonderland Syndrome is classified as a perceptual disorder. The sufferers report episodes of distorted visual perceptions, altered body schema, and distorted experiences of time. The syndrome can be caused by migraine headaches. Migraine headaches can be caused by cervical spine instability and aberrant intersegmental motion.

METHODS

Training the deep neck flexor endurance lead to a reduction in migraine headaches and in turn a reduction or secession of the Alice in Wonderland Syndrome episodes.

RESULTS

There is a resolution of the Alice in Wonderland Syndrome episodes after cervical spine stabilization is achieved.

CONCLUSIONS

Training of the deep neck flexors shows promise as a primary treatment of migraine headaches and should be further investigated.

Suboccipital Muscles, Forward Head Posture, and Cervicogenic Dizziness

Dizziness or vertigo can be caused by dysfunction of the vestibular or non-vestibular systems. The diagnosis, treatment, and mechanism of dizziness or vertigo caused by vestibular dysfunction have been described in detail. However, dizziness by the non-vestibular system, especially cervicogenic dizziness, is not well known. This paper explained the cervicogenic dizziness caused by abnormal sensory input with references to several studies. Among head and neck muscles, suboccipital muscles act as stabilizers and controllers of the head. Structural and functional changes of the suboccipital muscles can induce dizziness. Especially, myodural bridges and activation of trigger point stimulated by abnormal head posture may be associated with cervicogenic dizziness.

Short-Term Effects of Dry Needling with a Standard Exercise Program on Pain and Quality of Life in Patients with Chronic Mechanical Neck Pain

Background: This study aimed to determine the short-term effects of dry needling (DN) combined with a standard exercise program on pain and quality of life in patients with chronic mechanical neck pain (CMNP). Methods: Thirty-one patients with CMNP were randomly allocated to the experimental and control groups. The experimental group received DN and underwent a standard exercise program (one DN session and six exercise sessions) for two weeks, whereas the control group underwent the same exercise program alone for two weeks. The participants’ scores in the Numeric Pain Rating Scale (NPRS), Neck Disability Index (NDI), Short Form-36 Quality of Life Scale (SF-36 QOLS), and Beck Depression Inventory (BDI) before and after the intervention were assessed. Results: The control and experimental groups’ post-test NDI, NPRS, SF-36 QOLS, and BDI scores significantly differed from their baseline scores (p ≤ 0.05). The between-group comparison of the post-test scores using Wilcoxon rank-sum test revealed no significant differences between the NDI, NPRS, BDI, and SF-36 QOLS scores of both groups (p ≥ 0.05). Conclusions: One session of trigger point DN (TrP-DN) with exercise and exercise alone showed the same pain and quality-of-life outcomes after a two-week intervention. We did not recognise TrP-DN as an efficient intervention, not because we obtained evidence that it is ineffective, but because there were inadequate high-quality studies on the subject and unavailable data on the minimum quantity of injections required for better DN outcomes in CMNP patients.

Neck Strength Evaluated With Fixed and Portable Dynamometers in Asymptomatic Individuals: Correlation, Concurrent Validity, and Agreement

OBJECTIVE

The purpose of this study was to assess the correlation, concurrent validity, and agreement between the isometric cervical force measurements obtained with fixed and portable dynamometers in asymptomatic individuals.

METHODS

Fifty asymptomatic individuals performed 3 maximal isometric contractions for flexion, extension, and lateral flexion of the cervical spine using fixed and portable dynamometers. The correlation and concurrent validity for the measurements of the portable and fixed dynamometers were analyzed using Spearman's correlation coefficient and the intraclass correlation coefficient (ICC), respectively. The agreement between the force values of the portable and fixed dynamometers was measured using the Bland-Altman method.

RESULTS

Isometric cervical force measurements obtained with the fixed dynamometer and portable dynamometer showed a moderately to highly significant correlation for flexion (r_s = 0.74), extension (r_s = 0.82), right lateral flexion (r_s = 0.74), and left lateral flexion (r_s = 0.68). The concurrent validity was moderate to good for all measurements (ICC_2,3 = 0.67-0.80). The fixed and portable dynamometers did not agree, with a significant mean difference between the methods of 2.8 kgf (95% confidence interval [CI], 2.1-3.4 kgf) for cervical flexion, 5.3 kgf (95% CI, 4.2-6.4 kgf) for extension, and 9.1 kgf (95% CI, 0.4-2.1 kgf) for left lateral flexion. The limits of agreement were broad for all movements, with errors that varied between 61% and 77% of the mean force obtained with the fixed dynamometer.

CONCLUSION

The neck strength measurements obtained with the fixed and portable dynamometers demonstrated high to moderate correlation and had moderate to good comparability for asymptomatic participants. However, they did not agree in that the 2 methods did not provide equivalent measurements, and, therefore, based on these findings, the same equipment should always be used when reassessing an individual.

Cervical Motor and Nociceptive Dysfunction After an Acute Whiplash Injury and the Association With Long-Term Non-Recovery: Revisiting a One-Year Prospective Cohort With Ankle Injured Controls

Aims

To explore the development of cervical motor and nociceptive dysfunction in patients with whiplash (WPs) and non-recovery based on injury-related work disability 1-year after injury when compared with ankle-injured controls (ACs).

Methods

A 1-year observational prospective study examining consecutive WPs and age- and sex-matched ACs at 1 week,3 months, 6 months, and 1 year post-injury using semi-structured interviews; global pain rating (VAS0-10) and the pain rating index (PRI-T) and number-of-words-chosen (NWC) from the McGill Pain Questionnaire; examining nociceptive functioning using the cold pressor test (CPT), pressure algometry, and methodic palpation, and central pain processing using counter-stimulation; and examining motor functioning by active cervical range-of-motion (CROM), and neck strength [maximal voluntary contraction flexion/extension (MVC)]. One-year work disability/non-recovery was determined using a semi-structured interview.

Results

A total of 141 WPs and 40 ACs were included. Total pain rating index (PRI-T) NWC were higher in ACs after 1 week but higher in WPs after 3 months, 6 months, and 1 year. Ongoing global pain was higher in WPs after 1 week and after 3 and 6 months but not after 1 year. Pressure pain thresholds were reduced, and palpation was higher in the neck and jaw in WPs after 1 week but was not consistently different afterward from ACs. Cervical mobility was reduced in WPs after 1 week, 3 months, and 6 months but not after 1 year, and MVC was significantly reduced in WPs when compared with ACs after 1 week and 1 year but not after 3 and 6 months. One-year non-recovery was only encountered in 11 WPs and not in the AC group. Non-recovered WPs (N-WPs) had consistently significantly higher VAS₀₋₁₀, PRI-T, NWC, reduced pressure pain thresholds, raised muscle-tenderness, reduced active cervical range-of-motion, reduced active-neck-flexion/extension, and reported higher neck disability scores than recovered WPs. Of special interest, there was increasing tenderness in trigeminal-derived muscles based on palpation scores, and marked reduction of PPDT was most pronounced in N-WPs when compared with recovered WPs and ACs.

Conclusion

Cervical motor dysfunction and segmental nociceptive sensitization were present from early after injury in WPs and prolonged in N-WPs. Differences in trigeminal and cervical motor and sensory function in N-WPs could be of interest for future treatment studies.

Effectiveness of Specific Exercise for Deep Cervical Muscles in Nonspecific Neck Pain: A Systematic Review and Meta-Analysis

OBJECTIVE

The purpose of this review, focused on people with nonspecific neck pain (NSNP), was to assess the effectiveness of specific exercises that recruit the deep cervical muscles compared with other types of exercises or interventions and minimal or no treatment.

METHODS

This systematic review with meta-analysis screened 5 databases (MEDLINE, Embase, CINAHL, Physiotherapy Evidence Database, and The Cochrane Library). Randomized controlled trials investigating the effectiveness of this type of exercise on the intensity of pain were included. Data for each included trial were extracted by 2 independent reviewers. The Cochrane Risk of Bias 2.0 tool was adopted to assess the internal validity of the included trials. The overall quality of evidence was layered with the Grading of Recommendations, Assessment, Development and Evaluations system.

RESULTS

The review identified a total of 2397 records. Sixteen articles were included in the qualitative synthesis, and 9 studies were included in the meta-analysis. The pooled results found moderate- to very low-quality evidence that deep cervical muscle exercise protocols are not superior to other types of active exercises in reducing the intensity of pain in people with NSNP. Studies not included in the meta-analysis suggest that specific exercises induce better effects that are superior to those of nontreatment with clinically relevant results.

CONCLUSION

Clinicians can share this information with their patients through shared decision-making to determine a more tailored approach to adopt. Future studies with high methodological quality are necessary to reach firm conclusions.

IMPACT

There has been no consensus on exercise type and dosage for the management of NSNP. This study shows that exercises are a useful tool and that the effect of an exercise program that recruits deep cervical muscles seems to be comparable with the effect of other types of active exercises on pain intensity reduction.

LAY SUMMARY

If you have neck pain, exercises designed by a physical therapist can be a useful treatment tool. An exercise program that targets specific deep cervical muscles may be just as good as other types of active exercises to reduce the intensity of pain intensity; you and your therapist can work together to develop a program.

Online supervised versus workplace corrective exercises for upper crossed syndrome: a protocol for a randomized controlled trial

Background and objective

Musculoskeletal disorders (MSDs) including upper crossed syndrome (UCS) are considered as the leading cause of work-related issues worldwide among office workers. Therefore, the present study aims to evaluate the effect of workplace-based versus online-supervised home-based corrective exercises among office workers with UCS.

Methods and design

To this end, 45 subjects within the age range of 30–45 years are randomly assigned to three groups in the present parallel-group, randomized control trial using a pretest-posttest design. These groups include the subjects who receive online-supervised exercise and workplace exercise containing three sessions of intervention for 8 weeks and the control group receives no intervention while performing routine activities. The primary outcome variables are neck-shoulder pain (NSP) and consequent sick leave due to NSP, followed by alignment, workability, and the surface electromyography of upper, middle, and lower trapezius (UT, MT, and LT), sternocleidomastoid (SCM), and serratus anterior (SA) as the secondary variables.

Discussion

The present study seeks to assess the effect of workplace versus online-supervised corrective exercise interventions among 45 office workers suffering from UCS. It is expected to improve and reduce the related symptoms including postural malalignment and imbalance muscles after 8 weeks of corrective exercises. If effective, the findings may lead to adherence and work performance among the office workers, and individuals subjected to UCS can use the benefits of an online-supervised intervention. In addition, the findings may be useful in different workplaces as the evidence for employers to benefit from the reduction in the related costs and side effects of work-related neck/shoulder disorders including work disability, productivity loss, time expense, social insurance, work absenteeism, and treatment costs. Finally, clinicians and corrective exercise therapists can consider it as a clinical based-evidence intervention for their further actions.

Trial registration

Iranian Registry of Clinical Trials IRCT20200729048249N1. Registered on 5 October 2020 (https://en.irct.ir/user/trial/49992/view)

The effects of combined sternocleidomastoid muscle stretching and massage on pain, disability, endurance, kinesiophobia, and range of motion in individuals with chronic neck pain: A randomized, single-blind study

BACKGROUND

The effect of interventions to the Sternocleidomastoid (SCM)-muscle, as an important element of neck movement which is overactive in individuals with chronic neck pain (CNP), are unknown.

OBJECTIVE

The aim of the current study is to investigate the effects of SCM stretching and massage on pain, range of motion (ROM), endurance, disability, and kinesiophobia in individuals with CNP.

METHODS

In this study, individuals with CNP were randomized 1:1 to parallel SCM-Group (n = 30) or control group (CG) (n = 30). Conventional physiotherapy was applied to CG. In addition to the same interventions applied to the CG, classical massage and stretching exercises were applied to the SCM-muscle in the SCM-Group. Treatment sessions were administered three times each week for a total of 5 weeks. Pain, endurance, ROM, disability, and kinesiophobia were evaluated. Both prior to and immediately following the treatments. Mixed-model repeated measured ANOVAs were then employed to determine if a group*time interaction existed on the effects of the treatment on each outcome variable for each group as the between-subjects variable and time as the within-subjects variables.

RESULTS

Improvements in pain, disability, ROM(extension, left-lateral flexion, and right/left-rotation), and endurance were found to be greater in the SCM-Group compared to the CG (p < 0.05). Changes in flexion and right-lateral flexion ROM and kinesiophobia did not significantly differ between the groups (p > 0.05).

CONCLUSION

Stretching exercises and massage applied to the SCM-muscle, together with conventional physiotherapy, can reduce pain and disability, and increase ROM and endurance in individuals with CNP. This treatment may therefore be considered for use as an alternative method in treating CNP. The study was registered in ClinicalTrials.gov (NCT04345042).

A Longitudinal Evaluation of Risk Factors and Interactions for the Development of Nonspecific Neck Pain in Office Workers in Two Cultures

OBJECTIVE

To identify risk factors for the development of interfering neck pain in office workers including an examination of the interaction effects between potential risk factors.

BACKGROUND

The 1-year incidence of neck pain in office workers is reported as the highest of all occupations. Identifying risk factors for the development of neck pain in office workers is therefore a priority to direct prevention strategies.

METHODS

Participants included 214 office workers without neck pain from two cultures. A battery of measures evaluating potential individual and workplace risk factors were administered at baseline, and the incidence of interfering neck pain assessed monthly for 12 months. Survival analysis was used to identify relationships between risk factors and the development of interfering neck pain.

RESULTS

One-year incidence was 1.93 (95% CI [1.41, 2.64]) per 100 person months. Factors increasing the risk of developing interfering neck pain were older age, female gender, increased sitting hours, higher job strain, and stress. A neutral thorax sitting posture, greater cervical range of motion and muscle endurance, and higher physical activity were associated with a decreased risk of neck pain. The effects of some risk factors on the development of neck pain were moderated by the workers' coping resources.

CONCLUSION

Multiple risk factors and interactions may explain the development of neck pain in office workers. Therefore, plans for preventing the development of interfering neck pain in office workers should consider multiple individual and work-related factors with some factors being potentially more modifiable than others.

Effect of Deep Cervical Flexor Muscle Training Using Pressure Biofeedback on Pain and Forward Head Posture in School Teachers with Neck Pain: An Observational Study

BACKGROUND

Teaching is one of the professions where incidence and prevalence of neck pain is high. Prolonged use of computers, which has further increased due to online teaching amid pandemic, is known to cause neck pain and alter posture, while people with forward head posture (FHP) are prone to develop neck pain and related disability. Research has shown that impairment of deep cervical flexor (DCF) muscles leads to insufficiency in coordination, activation, overload, and poor support on cervical structures that further lead to development of neck pain and altered neck posture. The objective of this study was to see the effect of DCF muscle training using pressure biofeedback on pain and FHP in school teachers with neck pain.

METHODS

This observational study was conducted at medical center in school premises. Fifty-five school teachers aged between 25 and 40 years with experience of more than 5 years were invited to participate in this study. Subjects were divided in two groups. Both the groups received conventional exercises while in experimental group DCF muscle training using pressure biofeedback was given additionally. Pain and FHP were assessed using NPRS and cranio-vertebral angle using digital photograph technique, respectively, at baseline and end of four weeks of treatment.

RESULTS

Although pain and FHP improved in both the groups, mean improvement in both the measures was more in the group that also received DCF training using pressure biofeedback.

CONCLUSIONS

This study shows that although pain and FHP improved following conventional exercises in school teachers with neck pain, mean improvement was more significant among those who received additional DCF muscle training using pressure biofeedback.

Motor control training of deep neck flexors with pressure biofeedback improves pain and disability in patients with neck pain: A systematic review and meta-analysis

BACKGROUND

The effects of motor control training with pressure biofeedback on neck pain and disability of patients with neck pain is a field that has drawn a lot of research interest. Therefore, the aim of this study was to conduct, for the first time, a systematic review and meta-analysis for examining whether motor control training of deep neck flexors with pressure biofeedback improves pain and disability in patients with neck pain.

METHODS

The systematic review and meta-analysis were performed according to PRISMA guidelines. The databases PubMED, MEDLINE, EBSCOhost, Google scholar, SportDiscus, COCHRANE and EMBASE were searched for studies related to the research question. PEDro scale was used for examining methodological quality. A random effects model was used for data meta-analysis.

RESULTS

Seventeen studies were included for qualitative synthesis and 10 were selected for further quantitative synthesis. Motor control training of deep neck flexors with pressure biofeedback was found to have equal or better effectiveness on neck pain intensity and disability in comparison to other control interventions. The meta-analyses show that motor control training of deep neck flexors with pressure biofeedback is more effective than strength-endurance training of cervical muscles for improving pain (Hedges' g = 0.323, 95% CI 0.04-0.60, I² = 50.94%) and disability (Hedges g = 0.401, 95% CI 0.12-0.68, I² = 53.44%) in patients with neck pain.

CONCLUSIONS

Motor control training of deep neck flexors with pressure biofeedback is an effective intervention for improving pain intensity and disability in patients with neck pain and preferable to strength-endurance training of cervical muscles.

Comparative effectiveness of physical exercise interventions for chronic non-specific neck pain: a systematic review with network meta-analysis of 40 randomised controlled trials

OBJECTIVE

To compare the effectiveness of different physical exercise interventions for chronic non-specific neck pain.

DESIGN

Systematic review and network meta-analysis.

DATA SOURCES

Electronic databases: AMED, CINAHL, Cochrane Central Register of Controlled Trials, Embase, MEDLINE, Physiotherapy Evidence Database, PsycINFO, Scopus and SPORTDiscus.

ELIGIBILITY CRITERIA

Randomised controlled trials (RCTs) describing the effects of any physical exercise intervention in adults with chronic non-specific neck pain.

RESULTS

The search returned 6549 records, 40 studies were included. Two networks of pairwise comparisons were constructed, one for pain intensity (n=38 RCTs, n=3151 participants) and one for disability (n=29 RCTs, n=2336 participants), and direct and indirect evidence was obtained. Compared with no treatment, three exercise interventions were found to be effective for pain and disability: motor control (Hedges' g, pain -1.32, 95% CI: -1.99 to -0.65; disability -0.87, 95% CI: -1.45 o -0.29), yoga/Pilates/Tai Chi/Qigong (pain -1.25, 95% CI: -1.85 to -0.65; disability -1.16, 95% CI: -1.75 to -0.57) and strengthening (pain -1.21, 95% CI: -1.63 to -0.78; disability -0.75, 95% CI: -1.28 to -0.22). Other interventions, including range of motion (pain -0.98 CI: -2.51 to 0.56), balance (pain -0.38, 95% CI: -2.10 to 1.33) and multimodal (three or more exercises types combined) (pain -0.08, 95% CI: -1.70 to 1.53) exercises showed uncertain or negligible effects. The quality of evidence was very low according to the GRADE (Grading of Recommendations Assessment, Development and Evaluation) criteria.

CONCLUSION

There is not one superior type of physical exercise for people with chronic non-specific neck pain. Rather, there is very low quality evidence that motor control, yoga/Pilates/Tai Chi/Qigong and strengthening exercises are equally effective. These findings may assist clinicians to select exercises for people with chronic non-specific neck pain.

PROSPERO REGISTRATION NUMBER

CRD42019126523.

Effects of local vibration and cervical stabilization exercises on balance, joint position sense, and isometric muscle performance in young adults: A randomized controlled study

BACKGROUND: Cervical stabilization exercises and local vibration may improve proprioception and balance and prevent musculoskeletal problems. OBJECTIVE: To compare the effects of local vibration and cervical stabilization exercises on balance, cervical joint position sense, and muscle performance in healthy participants. METHODS: Forty-eight healthy male participants without neck pain were included. The participants were randomly divided into three groups: a home exercise program lasting eight weeks to the cervical stabilization group; 60 s of vibration to the neck muscles of the local vibration group and a control group. Balance, joint position sense, and muscle performance were evaluated twice in all subjects, before and after the intervention. RESULTS: Joint position sense error values were decreased in both the local vibration and cervical stabilization groups. Balance was improved (p< 0.001) in the local vibration group while improvement in muscle performance parameters was only seen in the cervical stabilization group (p< 0.05). CONCLUSIONS: The methods used in the present study may be used for improving the proprioceptive and vestibular components of balance in individuals with musculoskeletal problems such as cervical disc herniation, cervical spondylosis, or neck pain. However, given the limitations, much more research is needed to firmly establish these recommendations.

Prescription of exercises for the treatment of chronic pain along the continuum of nociplastic pain: A systematic review with meta-analysis

BACKGROUND AND OBJECTIVE

To compare different exercise prescriptions for patients with chronic pain along the continuum of nociplastic pain: fibromyalgia, chronic whiplash-associated disorders (CWAD), and chronic idiopathic neck pain (CINP).

DATABASES AND DATA TREATMENT

Randomized controlled trials comparing different exercise parameters were included. The search was performed in the databases Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, CINAHL and PEDro. Data on the parameters for the physical exercise programs for pain management were extracted for analysis.

RESULTS

Fifty studies with 3,562 participants were included. For fibromyalgia, both aerobic strengthening exercises were similar and better than stretching exercises alone. Exercises could be performed in 50- to 60-min supervised sessions, 2 to 3 times a week, for 13 weeks or more. For CWAD, body awareness exercises were similar to combined exercises, and there was no difference in adding sling exercises to a strengthening exercise program. The exercises could be performed in 90-min supervised sessions, twice a week, for 10 to 16 weeks. For CINP, motor control exercises and nonspecific muscle strengthening had a similar effect. Exercises could be performed in 30- to 60-min supervised sessions, 2 to 3 times a week, for 7 to 12 weeks.

CONCLUSIONS

The choice of parameters regarding exercises should emphasize global exercises in nociplastic pain conditions (such as fibromyalgia and CWAD) and specific exercises in non-nociplastic pain conditions (such as CINP) and be based on patient's preference and therapist's skills.

PROSPERO REGISTRATION NUMBER

CRD42019123271.

SIGNIFICANCE

The pain mechanism must be considered to optimize exercise prescription in patients with different chronic pain profiles. The main message of this article is that low to moderate intensity global exercises performed for a long period of treatment should be performed in patients with nociplastic pain predominance. Additionally, focused and intense exercises for a short period of treatment can be prescribed for patients with nociceptive pain predominance.

Evaluation of a Cervical Stabilization Exercise Program for Pain, Disability, and Physical Impairments in University Violinists with Nonspecific Neck Pain

Cervical stabilization exercises are frequently used to reduce pain, maximize function, and improve physical impairments for people with nonspecific neck pain. We conducted a single arm study to evaluate the effects of a home-based cervical stabilization exercise program for university violin players with nonspecific neck pain who frequently assume an asymmetrical neck posture and activate their superficial cervical flexors to stabilize the violin. Twenty violin players with nonspecific neck pain from university symphony orchestras participated in this study. All participants received assessments twice before the intervention and once immediately after a 6-week cervical stabilization exercise program. No significant differences were found between the two pretests before the intervention. After the intervention, the Numeric Rating Scale, the Neck Disability Index, the craniocervical flexion test, muscle endurance tests, cervical range of motion (all directions except flexion) tests, and cervicocephalic relocation tests (flexion and left rotation) showed improvements. The forward head posture indicated by the craniovertebral angle also slightly improved. The results of this single arm study suggest that cervical stabilization exercise is feasible and has the potential to improve physical health for collegiate violin players with nonspecific neck pain.

Scalene and sternocleidomastoid activation during normoxic and hypoxic incremental inspiratory loading

The purpose of this study was to examine scalene (SA) and sternocleidomastoid (SM) activation during normoxic (norm-ITL; FIO2  = 21%) and hypoxic (hyp-ITL; FIO2  = 15%) incremental inspiratory threshold loading (ITL). Thirteen healthy participants (33 ± 4 years, 9 female) performed two ITL tests breathing randomly assigned gas mixtures through an inspiratory loading device where the load was increased every two minutes until task failure. SA and SM root mean square (RMS) electromyography (EMG) were calculated and expressed as a percentage of maximum (RMS%max ) to reflect muscle activation intensity. Myoelectric manifestations of fatigue were characterized as decreased SA or SM EMG median frequency during maximum inspiratory pressure maneuvers before and after ITL. Dyspnea was recorded at baseline and task failure. Ventilatory parameters and mouth pressure (Pm) were recorded throughout the ITL. SA,RMS%max and SM,RMS%max increased in association with ITL load (p ≤ .01 for both). SA,RMS%max was similar between norm-ITL and hyp-ITL (p = .17), whereas SM,RMS%max was greater during the latter (p = .001). Neither SA nor SM had a decrease in EMG median frequency after ITL (p = .75 and 0.69 respectively). Pm increased in association with ITL load (p < .001) and tended to be higher during hyp-ITL compared to norm-ITL (p = .05). Dyspnea was similar during both conditions (p > .05). There was a trend for higher tidal volumes during hyp-ITL compared to norm-ITL (p = .10). Minute ventilation was similar between both conditions (p = .23). RMS,%max of the SA and SM increased linearly with increasing ITL. The presence of hypoxia only increased SM activation. Neither SA nor SM presented myoelectric manifestations of fatigue during both conditions.

Forward flexed posture: reliability and determinants of tragus-to-wall measurement

INTRODUCTION

Forward flexed posture is an impairment in body structure commonly seen among older adults and those with pathologies such as ankylosing spondylitis and osteoporosis. Accurate measurement of forward flexed posture is important as it is related to pain, mobility limitations, and falls. Our purpose was to examine the reliability and determinants of forward flexed posture as indicated by tragus-to-wall (TTW) distance.

METHODS

Twenty healthy younger and 20 healthy older adults were included in this secondary analysis of data from a neck strength study. Measurements included the linear distance of TTW standing naturally and with neck retraction, age, gender, body mass index (BMI), and neck retraction strength. Measurements were performed initially by 2 investigators and by the primary investigator 1 week later. Intraclass correlation coefficients (ICCs) (model 3,1) described relative reliability and Bland-Altman plots characterized absolute reliability. A mixed general linear model examined the determinants for TTW distance.

RESULTS

Good inter-rater (ICC = 0.811-0.878) and test-retest reliability (ICC = 0.853-0.862) were found in both positions. Bland-Altman plots showed that absolute limits of agreement ranged from - 1.9 to +3.8 cm for inter-rater reliability and -2.4 to +2.6 cm for test-retest reliability. Analysis of TTW determinants demonstrated significant differences between neck positions, dichotomous age groups, and BMI groups (p ≤ 0.001). There was no significant difference based on neck strength.

CONCLUSIONS

Our results indicate that TTW distance, measured using a standardized procedure, is a reliable method of quantifying forward flexed posture. TTW distance is greater in relaxed standing, older individuals, and those with greater BMI.

A brief report on the clinical trial on neural mobilization exercise for joint pain in patients with rheumatoid arthritis

BACKGROUND

In rheumatoid arthritis (RA) synovitis, activation of synoviocytes and infiltration of adaptive immune cells leads to synovial hyperplasia and joint swelling. Under the elevated extra-neural pressure, free nerve endings release neuropeptides, calcitonin gene-related peptide, and substance P, thus promoting neurogenic inflammation.

OBJECTIVE

This study aimed to assess the effect of therapeutic neural mobilization (NM) exercises targeting the nervous system on disease impact in RA patients.

METHODS

A total of 21 RA patients were randomized into NM (n = 11) and control (n = 10) groups. NM group patients performed NM exercises targeting the median, musculocutaneous, femoral, and saphenous nerve, as well as the entire nervous system twice daily for 4-8 weeks. Control RA patients performed gentle joint mobilization exercises targeting the same joints. Primary outcome was the change in pre-/post-treatment score in the validated Rheumatoid Arthritis Impact of Disease (RAID). Secondary outcome was erythrocyte sedimentation rate (ESR).

RESULTS

There were no significant differences between the groups at baseline. No adverse events were observed and compliance was over 90%. Post-treatment, favorable changes were observed in the NM group RAID score: -5.1 vs. -0.8; weighted RAID score: -0.79 vs. -0.15. ESR was reduced in the NM group, albeit non-significantly. Regarding the RAID score domains, the NM group demonstrated significant improvements in pain and coping.

CONCLUSION

The current data indicate a beneficial effect of NM exercises on pain and self-efficacy in our RA patients. Larger clinical studies are warranted to determine the clinical effectiveness of NM as a treatment for pain for RA patients and simultaneously address immune and neuropeptide modulation through NM.

Effects of an integrated neuromuscular inhibition technique program on neck muscle strength and endurance in individuals with chronic mechanical neck pain

BACKGROUND

The aim of this study was to investigate whether the application of the integrated neuromuscular inhibition technique (INIT) combined with therapeutic exercise (TE) can provide faster and greater improvement in maximum isometric strength and isometric endurance of the neck muscles in patients with chronic mechanical neck pain (CMNP).

METHODS

In this 10-week, single-blind clinical trial, 40 participants (men and women) with CMNP were divided into two groups. The intervention group (IG) followed a TE program in combination with the INIT, while the control group (CG) followed the same TE program without the INIT technique. Changes in maximum isometric strength and isometric endurance of the neck muscles were evaluated before, during, and after the intervention, with follow-up measurements taken at 1, 3, and 6 months after the intervention. Analysis of variance with repeated measures was applied.

RESULTS

Both groups showed a significant improvement in all dependent measures after the intervention (p < .05). These changes were maintained for both groups 6 months after the intervention. However, the IG showed a greater improvement in the maximum isometric strength of neck flexion and an improved craniocervical flexion test score compared with the CG.

CONCLUSION

The combination of TE and INIT had a positive effect on neck muscle strength and endurance in individuals suffering from CMNP as compared with TE alone.

Early results of supervised versus unsupervised rehabilitation of patients with cervical pain

PURPOSE

Comparison of early effects of supervised (led by physiotherapist) and unsupervised rehabilitation protocols in patients with myofascial pain syndrome, disk-root conflict and degenerative spine disease at cervical level.

METHODS

Three groups of patients (n = 60 each) with clinically and neurophysiologically confirmed myofascial pain syndrome, disk-root conflict and degenerative spine disease were randomly subdivided to supervised and unsupervised treatment subgroups (n = 30 each). Thirty healthy subjects with similar demographic and anthropometric properties as patients were enrolled to control group. Patients were examined before and after rehabilitation with visual analog scale of pain, Spurling's test, painful passive elongation and active trigger points detection in trapezius muscle, sensory perception studies and surface electromyography (at rest, during maximal contraction) and electroneurography.

RESULTS

Supervised treatment resulted in decrease of pain intensity (P = .001) and Spurling's symptoms incidence (P = .008) in patients from disk-root conflict group. Painful elongation and incidence of trigger points in trapezius muscle were the least observed at P = .009 after supervised therapy of myofascial pain syndrome. Supervised therapy resulted in decrease of resting electromyography amplitude and increase of maximal contraction electromyography amplitude from trapezius muscle (P = .02) in myofascial pain syndrome patients and from biceps and abductor pollicis brevis muscles of patients from other groups (P from .05 to .001). Median nerve electroneurography and sensory perception results improved at P = .05 after supervised treatment in disk-root conflict group.

CONCLUSIONS

Twenty-day supervised rehabilitation provides better therapeutic effects than unsupervised one in treatment of muscle dysfunctions in patients with myofascial pain syndrome, degenerative changes and disk-root conflict at cervical spine.

Reliability and validity of measurements of cervical retraction strength obtained with a hand-held dynamometer

Objectives: The purpose of this study was to describe the reliability and validity of measurements of cervical retraction strength obtained with a hand held dynamometer (HHD) from healthy adults. Background: Impaired neck muscle strength is related to neck pain, abnormal posture, and various cervical pathologies. While sophisticated devices to objectively measure neck strength exist, many are not practicable in typical orthopedic practices or have questionable validity and reliability. Methods: Forty participants were included in the analysis of neck strength using isometric testing with an HHD fixed in a cradle on a table top. The highest neck retraction force recorded in Newtons (N) for each participant, was used for data analysis. Results: Both intratester and intertester reliability were excellent as judged by intraclass correlation coefficients (ICCs) (.885 - .974) and minimal detectable change (MDC) (21.1 to 47.6 N). Validity was confirmed on the basis of expected gender and age differences (ie, men were stronger than women and younger participants were stronger than older participants). Conclusion: Fixed HHD is a reliable and valid tool for measuring isometric neck retraction strength in ostensibly healthy adults. Its value in the assessment of individuals with neck pathology awaits further examination.

Effect of jaw functional status on neck muscle endurance

OBJECTIVE

To investigate the effect of resting jaw and maximum voluntary clenching on neck flexor and extensor muscle endurance.

DESIGN

Neck flexor and extensor endurance was measured in a college health clinic in 85 male college students in two test positions: resting jaw (control) and maximum voluntary clenching.

RESULTS

Mean neck flexor muscle endurance values during resting jaw and maximum voluntary clenching were 70.06 SD 28.24, and 60.03 SD 16.5, seconds respectively. Mean neck extensor muscle endurance values during resting jaw and maximum voluntary clenching were 105.54 SD 29.9, and 98.32 SD 24.54, respectively. Both values were significantly lower while maximum voluntary clenching as compared to resting jaw position (p < 0.05).

CONCLUSION

Modification of jaw position can affect neck muscle endurance. Results of this study further supports sensory-motor relation between jaw and neck region.

Effects of deep cervical flexor training on impaired physiological functions associated with chronic neck pain: a systematic review

Background

Neck pain is a major health issue with high rates of recurrence. It presents with a variety of altered sensorimotor functions. Exercise is a cornerstone of rehabilitation and many training methods are used. Exercise is evaluated in most randomized controlled trials on its pain relieving effects. No review has assessed the effect of exercise on the altered physiological functions or determined if there are differential effects of particular training methods. This review investigated the effects of deep cervical flexor (DCF) training, a training method commonly used for patients with neck pain, and compared it to other training methods or no training on outcomes of cervical neuromuscular function, muscle size, kinematics and kinetics.

Methods

Web of Science, Scopus, CINAHL, PubMed were searched from inception until January 2018. Twelve randomized controlled trials were included that compared DCF training as sole intervention to other training or no interventions in persons with neck pain. The Cochrane Risk of Bias tool was used to assess the method quality. All outcome measures were analysed descriptively and meta-analyses were performed for measures evaluated in three or more studies.

Results

DCF training was compared to cervical endurance, strength, proprioception and mobility training, muscle stretching, and no intervention control groups. Physiological outcome measures included neuromuscular co-ordination (craniocervical flexion test), functional tasks, muscle fatigability, muscle size, kinematics (joint position sense, posture and range of motion) and kinetics (strength, endurance and contraction accuracy). Strong evidence was found for effectiveness of DCF training on neuromuscular coordination, but it had no or small effects on strength and endurance at higher loads. DCF training improved head and cervical posture, while evidence was limited or contradictory for other measures.

Conclusions

DCF training can successfully address impaired neuromuscular coordination, but not cervical flexor strength and endurance at higher contraction intensities. A multimodal training regime is proposed when the aim is to specifically address various impaired physiological functions associated with neck pain.

The clinical reasoning process in randomized clinical trials with patients with non-specific neck pain is incomplete: A systematic review

OBJECTIVE

Primarily to evaluate the completeness of the description of the clinical reasoning process in RCTs with patients with non-specific neck pain with an argued or diagnosed cause i.e. an impairment or activity limitation. Secondly, to determine the association between the completeness of the clinical reasoning process and the degree of risk of bias.

DATA SOURCES

Pubmed, Cinahl and PEDro were systematically searched from inception to July 2016.

STUDY SELECTION

RCTs (n = 122) with patients with non-specific neck pain receiving physiotherapy treatment published in English were included.

DATA EXTRACTION

Data extraction included study characteristics and important features of the clinical reasoning process based on the Hypothesis-Oriented Algorithm for Clinicians II (HOAC II)].

DATA SYNTHESIS

Thirty-seven studies (30%) had a complete clinical reasoning process of which 8 (6%) had a 'diagnosed cause' and 29 (24%) had an 'argued cause'. The Spearmans rho association between the extent of the clinical reasoning process and the risk of bias was -0.2.

CONCLUSIONS

In the majority of studies (70%) the described clinical reasoning process was incomplete. A very small proportion (6%) had a 'diagnosed cause'. Therefore, a better methodological quality does not necessarily imply a better described clinical reasoning process.

Neck-specific exercises with internet-based support compared to neck-specific exercises at a physiotherapy clinic for chronic whiplash-associated disorders: study protocol of a randomized controlled multicentre trial

Background

Globally, neck pain is the fourth most common condition associated with longer periods of living with disability. Annually, approximately 0.3% of the population of Western countries undergo whiplash trauma, and half of those individuals will develop chronic problems with high costs for the individual and society. Evidence for chronic whiplash-associated disorders (WAD) treatment is scarce, though neck-specific training at a physiotherapy clinic twice a week for 12 weeks has demonstrated good results. More efficient, flexible rehabilitation with reduced waiting times and lower costs is needed, ideally replacing lengthy on-site treatment series by healthcare providers. Internet-based care has been shown to be a viable alternative for a variety of diseases and interventions, but studies are lacking on Internet-based interventions for individuals with chronic neck problems. The aim of the trial described here is to compare the effects of an Internet-based neck-specific exercise programme to the same exercises performed at a physiotherapy clinic in regards to self-reported and clinical measures, as well as cost-effectiveness.

Methods

This prospective, randomized controlled trial will involve 140 participants. Measurements will be made at baseline, 3 months (end of treatment), and 15 months (12 months after end of intervention) and will include ratings of pain, disability, satisfaction with care, work ability, quality of life, and cost-effectiveness.

Discussion

The study results may contribute to the development of a more effective rehabilitation, flexible and equal care, shorter waiting times, increased availability, and lower costs for healthcare and society.

Trial registration

ClinicalTrials.gov Protocol ID: NCT03022812, initial release 12/20/2016.

Is the clinical cervical extensor endurance test capable of differentiating the local and global muscles?

BACKGROUND CONTEXT

Differential alterations have been reported in the local and global cervical muscles in the presence of chronic neck pain (CNP), including the endurance alterations of these muscles. Identifying the involved muscles is crucial to the assessment and rehabilitation of patients with CNP.

PURPOSE

To assess the relationship between clinical endurance test results, pain and disability indices, and ultrasonographic (US) measurements of the neck extensor muscles; to compare the deep and superficial cervical extensor muscle endurance and size of CNP patients with those of asymptomatic subjects and to compare the relationship between local and global extensor endurance with US measures, pain intensity, and disability.

STUDY DESIGN/SETTING

Cross-sectional correlational analysis with a case-control design.

PATIENT SAMPLE

Thirty patients with CNP and 30 asymptomatic subjects participated in this study.

OUTCOME MEASURES

Endurance, thickness, cross-sectional area, and shape ratio of the cervical extensor muscles (splenius capitis [SpCap], semispinalis capitis [SSCap], semispinalis cervicis [SSCer], and multifidus [MF]); pain intensity measured by the visual analog scale (VAS); neck disability index (NDI); correlation between US measures, pain intensity and NDI and extensor endurance; and correlation of US measures with pain intensity and NDI.

METHODS

The deep and superficial cervical extensor muscle endurance and dimensions were measured via a clinical test and by US, respectively. Participants were asked to hold the neutral chin-tuck position while lying prone. The test would be terminated if the head moved into either flexion or extension, which would yield "global" or "local" extensor muscle endurance, respectively.

RESULTS

The CNP patients showed lower global extensor endurance levels than the control participants (p<.05). The US measures of the deep extensor muscles were also smaller in the CNP group (p<.05). There were no significant correlations between extensor endurance test results and US measures in either group except for the SSCap muscle size with local and total endurance (p=.04 for both) of CNP and control participants, respectively. NDI was correlated with SpCap and SSCer muscle thicknesses in a positive and negative manner, respectively (p=.03 for both). There was also a significant correlation between MF size and VAS (p<.05).

CONCLUSIONS

The findings showed higher levels of global muscle fatigability and smaller size of deep neck extensor muscles in CNP patients. Disability and extensor endurance were found to be associated with extensor muscle size. The results challenge the validity of the clinical extensor muscle endurance test in the differentiation of the deep and superficial extensor muscle endurance and the use of US in the assessment of cervical muscle endurance. Further investigations are needed to judge the superficial and deep muscle endurance in CNP patients.

Effect of sleep posture on neck muscle activity

[Purpose] This study investigated the effect of sleep posture on neck muscle activity. [Subjects and Methods] The study recruited 20 healthy subjects, who were positioned in three supine sleeping positions: both hands at sides, both hands on the chest, and dominant hand on the forehead. The activities of the scalene and upper trapezius muscles bilaterally were measured by surface electromyography. [Results] The upper trapezius and scalene muscle activity on the right side was significantly greater in the supine with dominant hand on the forehead position than in the other positions. [Conclusion] Sleep posture is important and prevent neck and shoulder musculoskeletal pain.

The clinical and EMG assessment of the effects of stabilization exercise on nonspecific chronic neck pain: A randomized controlled trial

BACKGROUND

Neck pain is an important cause of disability. In spite of its high prevalence rate, treatment of the disorder is a challenging topic. Stabilization exercise has been the topic of many studies.

OBJECTIVE

To compare the effects of stabilization and routine exercises on chronic neck pain.

METHODS

Forty patients were randomly assigned into either stabilization or routine exercise groups and undertook a 10-week training program. Electromyographic (EMG) activity was recorded from Sternocleidomastoid (SCM), Anterior Scalene (AS) and Splenius Capitis (SC) muscles bilaterally. Endurance time of deep flexor muscles was measured by chronometer.Pain and disability were measured using Visual Analogue Scale (VAS) and neck disability index (NDI) questionnaire, respectively before and after training period.

RESULTS

Findings revealed significant decreased pain and disability in both groups after intervention (P< 0/001). Flexor muscles endurance of stabilization group was significantly increased compared with that of routine (P< 0/001). Also EMG activity of SCM, AS and SC muscles were significantly decreased in stabilization group compared with routine (P< 0/001).

CONCLUSION

Increased deep flexor endurance and decreased EMG activity of SCM, AS and SC muscles suggest an important role for stabilizing exercises on reducing the activity of superficial muscles in chronic neck pain.

Comparison of muscular fatigue and tone of neck according to craniocervical flexion exercise and suboccipital relaxation in cervicogenic headache patients

[Purpose] This study was conducted to compare and analyze influence of craniocervical flexion and suboccipitalis relaxation in cervicogenic headache patients of their cervical muscular fatigue, tone, and headache intensity. [Subjects and Methods] 30 patients with cervicogenic headache were selected and 10 subjects per group were randomly assigned to control group, craniocervical flexion exercise group, and suboccipitalis relaxation group. Intervention for each group was provided 5 times a week for 4 weeks. Muscular tone test and muscular fatigue test were conducted on both sides of upper trapezius and sternocleidomastoideus and visual analogue sclae on the headache intensity was conducted before the intervention, after 2 weeks, and after 4 weeks. [Results] Difference from intervention was significant in muscular fatigue of upper trapezius and sternocleidomastoideus, muscular tone of sternocleidomastoideus, and headache intensity. Correlation between intervention duration and the groups showed significant difference in muscular fatigue, muscular tone, and headache intensity except left upper trapezius muscle. [Conclusion] From this study, 4 week application of crainiocervical flexion exercise and suboccipitalis relaxation on cervicogenic headache patients was found to be effective in decrease of muscular fatigue of upper trapezius and sternocleidomastoideus, muscular tone of sternocleidomastoideus, and headache intensity.

Reliability of a measurement method for the cross-sectional area of the longus colli using real-time ultrasound imaging

OBJECTIVE

Real-time ultrasound imaging is an established objective outcome measurement with proven reliability. However, it is still largely biased by user-ability. Published research in the area of real-time ultrasound imaging reliability in the cervical region and in particular the deep cervical flexors is quite sparse. The purpose of this investigation was to examine if a novice ultrasound user could agree favourably with an experienced ultrasound sonographer in measuring the cross-sectional area of the longus colli.

METHODS

Ultrasound images were captured from 22 healthy subjects on two different occasions, one week apart, by a novice ultrasound user. They were acquired using a GE Healthcare LOGIQe ultrasound machine, at a depth of 3-4 cm with the transducer frequency set to 8 MHz, in line with previous research guidelines. Cross-sectional area was then measured on-screen by both a novice and experienced ultrasound user to determine inter-rater reliability. Intra-rater reliability was also analysed using cross-sectional area figures from days one and two.

RESULTS

Intra-rater reliability for real-time ultrasound imaging for the cross-sectional area of the longus colli was "excellent" (intra-class correlation 0.90, 95% CI 0.82-0.95). Inter-rater reliability was "moderate" but in keeping with previous published research (intra-class correlation 0.61, 95% CI 0.37-0.77).

CONCLUSION

Difficulties in identifying the borders of the longus colli muscle due to its deep anatomical location and surrounding structures make it difficult for assessors to agree favourably on cross-sectional area measurements, leading to "moderate" levels of inter-rater reliability and poor agreement. Intra-rater reliability is excellent, and in this instance indicates that a novice user can be just as reliable as a more experienced ultrasound user.

Anterior Cervical Discectomy and Fusion: Practice Patterns Among Greek Spinal Surgeons

Background

A web-based survey was conducted among Greek spinal surgeons to outline the current practice trends in regard to the surgical management of patients undergoing anterior cervical discectomy and fusion (ACDF) for degenerative cervical spine pathology. Various practice patterns exist in the surgical management of patients undergoing anterior cervical discectomy for degenerative pathology. No consensus exists regarding the type of the employed graft, the necessity of implanting a plate, the prescription of an external orthotic device, and the length of the leave of absence in these patients.

Methods

A specially designed questionnaire was used for evaluating the criteria for surgical intervention, the frequency of fusion employment, the type of the graft, the frequency of plate implantation, the employment of an external spinal orthosis (ESO), the length of the leave of absence, and the prescription of postoperative physical therapy. Physicians’ demographic factors were assessed including residency and spinal fellowship training, as well as type and length in practice.

Results

Eighty responses were received. Neurosurgeons represented 70%, and orthopedic surgeons represented 30%. The majority of the participants (91.3%) considered fusion necessary. Allograft was the preferred type of graft. Neurosurgeons used a plate in 42.9% of cases, whereas orthopedic surgeons in 100%. An ESO was recommended for 87.5% of patients without plates, and in 83.3% of patients with plates. The average duration of ESO usage was 4 weeks. Physical therapy was routinely prescribed postoperatively by 75% of the neurosurgeons, and by 83.3% of the orthopedic surgeons. The majority of the participants recommended 4 weeks leave of absence.

Conclusions

The vast majority of participants considered ACDF a better treatment option than an ACD, and preferred an allograft. The majority of them employed a plate, prescribed an ESO postoperatively, and recommended physical therapy to their patients.

The effect of neck-specific exercise with, or without a behavioral approach, on pain, disability, and self-efficacy in chronic whiplash-associated disorders: a randomized clinical trial

Objectives:

The aim of this study was to compare the effect on self-rated pain, disability, and self-efficacy of 3 interventions for the management of chronic whiplash-associated disorders: physiotherapist-led neck-specific exercise (NSE), physiotherapist-led NSE with the addition of a behavioral approach, or Prescription of Physical Activity (PPA).

Materials and Methods:

A total of 216 volunteers with chronic whiplash-associated disorders participated in this randomized, assessor blinded, clinical trial of 3 exercise interventions. Self-rated pain/pain bothersomeness (Visual Analogue Scale), disability (Neck Disability Index), and self-efficacy (Self-Efficacy Scale) were evaluated at baseline and at 3 and 6 months.

Results:

The proportion of patients reaching substantial reduction in pain bothersomness (at least 50% reduction) was more evident (P<0.01) in the 2 NSE groups (29% to 48%) compared with the PPA group (5%) at 3 months. At 6 months 39% to 44% of the patients in the 2 neck-specific groups and 28% in the PPA group reported substantial pain reduction. Reduction of disability was also larger in the 2 neck-specific exercise groups at both 3 and 6 months (P<0.02). Self-efficacy was only improved in the NSE group without a behavioral approach (P=0.02). However, there were no significant differences in any outcomes between the 2 physiotherapist-led NSE groups.

Discussion:

NSE resulted in superior outcomes compared with PPA in this study, but the observed benefits of adding a behavioral approach to the implementation of exercise in this study were inconclusive.

The effect of neurac training in patients with chronic neck pain

[Purpose] This study aimed to investigate the effects of neurac training on pain, function, balance, fatigability, and quality of life. [Subjects and Methods] Subjects with chronic neck pain who were treated in S hospital were included in this study; they were randomly allocated into two groups, i.e., the experimental group (n = 10) and the control group (n = 10). Both groups received traditional physical therapy for 3 sessions for 30 min per week for 4 weeks. The experimental group practiced additional neurac training for 30 min/day, for 3 days per week for 4 weeks. All subjects were evaluated using the visual analogue scale (VAS), the neck disability index (NDI), the biorescue (balance), the questionnaire for fatigue symptoms (fatigue), and the medical outcome 36-item short form health survey (SF-36) pre- and post-intervention. [Results] The experimental group effectively improved their pain, function, balance, fatigability, and quality of life. [Conclusion] Neurac training is thus considered an effective training program that enhances body functionality by improving pain, function, balance ability, fatigability, and quality of life in patients with chronic neck pain.

Exercises for mechanical neck disorders

BACKGROUND

Neck pain is common, disabling and costly. Exercise is one treatment approach.

OBJECTIVES

To assess the effectiveness of exercises to improve pain, disability, function, patient satisfaction, quality of life and global perceived effect in adults with neck pain.

SEARCH METHODS

We searched MEDLINE, MANTIS, ClinicalTrials.gov and three other computerized databases up to between January and May 2014 plus additional sources (reference checking, citation searching, contact with authors).

SELECTION CRITERIA

We included randomized controlled trials (RCTs) comparing single therapeutic exercise with a control for adults suffering from neck pain with or without cervicogenic headache or radiculopathy.

DATA COLLECTION AND ANALYSIS

Two review authors independently conducted trial selection, data extraction, 'Risk of bias' assessment and clinical relevance. The quality of the evidence was assessed using GRADE. Meta-analyses were performed for relative risk and standardized mean differences (SMD) with 95% confidence intervals (CIs) after judging clinical and statistical heterogeneity.

MAIN RESULTS

Twenty-seven trials (2485 analyzed /3005 randomized participants) met our inclusion criteria.For acute neck pain only, no evidence was found.For chronic neck pain, moderate quality evidence supports 1) cervico-scapulothoracic and upper extremity strength training to improve pain of a moderate to large amount immediately post treatment [pooled SMD (SMDp) -0.71 (95% CI: -1.33 to -0.10)] and at short-term follow-up; 2) scapulothoracic and upper extremity endurance training for slight beneficial effect on pain at immediate post treatment and short-term follow-up; 3) combined cervical, shoulder and scapulothoracic strengthening and stretching exercises varied from a small to large magnitude of beneficial effect on pain at immediate post treatment [SMDp -0.33 (95% CI: -0.55 to -0.10)] and up to long-term follow-up and a medium magnitude of effect improving function at both immediate post treatment and at short-term follow-up [SMDp -0.45 (95%CI: -0.72 to -0.18)]; 4) cervico-scapulothoracic strengthening/stabilization exercises to improve pain and function at intermediate term [SMDp -14.90 (95% CI:-22.40 to -7.39)]; 5) Mindfulness exercises (Qigong) minimally improved function but not global perceived effect at short term. Low evidence suggests 1) breathing exercises; 2) general fitness training; 3) stretching alone; and 4) feedback exercises combined with pattern synchronization may not change pain or function at immediate post treatment to short-term follow-up. Very low evidence suggests neuromuscular eye-neck co-ordination/proprioceptive exercises may improve pain and function at short-term follow-up.For chronic cervicogenic headache, moderate quality evidence supports static-dynamic cervico-scapulothoracic strengthening/endurance exercises including pressure biofeedback immediate post treatment and probably improves pain, function and global perceived effect at long-term follow-up. Low grade evidence supports sustained natural apophyseal glides (SNAG) exercises.For acute radiculopathy, low quality evidence suggests a small benefit for pain reduction at immediate post treatment with cervical stretch/strengthening/stabilization exercises.

AUTHORS' CONCLUSIONS

No high quality evidence was found, indicating that there is still uncertainty about the effectiveness of exercise for neck pain. Using specific strengthening exercises as a part of routine practice for chronic neck pain, cervicogenic headache and radiculopathy may be beneficial. Research showed the use of strengthening and endurance exercises for the cervico-scapulothoracic and shoulder may be beneficial in reducing pain and improving function. However, when only stretching exercises were used no beneficial effects may be expected. Future research should explore optimal dosage.

Altered Co-contraction of Cervical Muscles in Young Adults with Chronic Neck Pain during Voluntary Neck Motions

[Purpose] Muscle co-contraction is important in stabilizing the spine. The aim of this study was to compare cervical muscle co-contraction in adults with and without chronic neck pain during voluntary movements. [Subjects and Methods] Surface electromyography of three paired cervical muscles was measured in fifteen young healthy subjects and fifteen patients with chronic neck pain. The subjects performed voluntary neck movements in the sagittal and coronal plane at slow speed. The co-contraction ratio was defined as the normalized integration of the antagonistic electromyography activities divided by that of the total muscle activities. [Results] The results showed that the co-contraction ratio of patients was greater during flexion movement, lesser during extension movement, slightly greater during right lateral bending, and slightly lesser during left lateral bending compared with in the controls. [Conclusion] The results suggested that neck pain patients exhibit greater antagonistic muscle activity during flexion and dominate-side bending movements to augment spinal stability, while neuromuscular control provides relatively less protection in the opposite movements. This study helps to specify the changes of the stiffness of the cervical spine in neck pain patients and provides a useful tool and references for clinical assessment of neck disorders.