Musculoskeletal Demands in Violin and Viola Playing: A Literature Review

Muscle fatigue during assisted violin performance

Muscle fatigue is a primary risk factor in developing musculoskeletal disorders, which affect up to 93% musicians, especially violinists. Devices providing dynamic assistive support (DAS) to the violin-holding arm can lessen fatigue. The objective was to assess DAS effects on electromyography median frequency and joint kinematics during a fatiguing violin-playing task. Fifteen university-level and professional violinists were equipped with electromyography sensors and reflective markers to record upper-body muscle activity and kinematics. They played G scales with and without DAS until exhaustion. Paired t-tests assessed DAS effects on delta (final-initial) electromyography median frequencies and joint kinematics. DAS prevented the median frequency decrease of left supraspinatus, superior trapezius, and right medial deltoid, and increases in trunk rotation, left-wrist abduction, and right arm-elevation plane. DAS effects on kinematics were marginal due to retention of musical performance despite fatigue. However, DAS reduced fatigue of several muscles, which is promising for injury prevention.Practitioner summary: Violinists are greatly affected by musculoskeletal disorders. Effects of a mobility assistive device on muscle fatigue during violin playing was investigated. The assistive technology slowed down the development of fatigue for three neck/shoulder muscles, making assisted musical performance a promising avenue to prevent violinists' injuries.

The user experience of violinists playing with a novel ergonomic chinrest: An evaluation on motivation, usage behaviour, usability and acceptance

BACKGROUND

This study focuses on the user experience of a novel developed ergonomic chinrest (EC), customised to accommodate the individual violinist's anthropometry and playing style. The EC was recently tested for biomechanical effect, but the violin player's motivation, usage behaviour, usability and acceptability may be equally important.

OBJECTIVE

To explore the user experience of violinists who used the novel EC with a low shoulder rest for two weeks. Through that experience, we wanted to learn about the potential user barriers and facilitators related to their motivation, usage behaviour, usability, and acceptability, when trying a new product.

METHODS

Thirty-eight professional violinists participated and evaluated motivation, user behaviour, usability and acceptance using a 5-point Likert scale and open-ended questions.

RESULTS

Participants showed high motivation hoping to improve posture, reduce muscle tension and enhance performance. Usage behaviour was also high, while product appearance, adjustment time, and sound impact were negatively evaluated. However, 37% planned to continue to use EC after the study.

CONCLUSION

Participants showed high motivation and usage behaviour but faced challenges with product appearance, adjustment time, and sound impact compared to their usual chinrest. Incorporating user feedback and addressing design and usability challenges can enhance the user experience.

Measuring the usability of a novel ergonomic chinrest during violin playing: A feasibility study

BACKGROUND

Playing the violin often requires a rotated and lateral flexed neck, leading to potential neck and shoulder problems. An ergonomic chinrest (EC) with or without a shoulder rest (SR or WSR) may enhance neutral neck positioning, but the feasibility of the EC needs to be studied.

OBJECTIVE

Our goal was to evaluate the usability of the EC for a two-week familiarisation period, including aspects such as playing performance, comfort level, and emotional response (e.g., feelings about using the product) among a group of violinists.

METHODS

A one-arm feasibility study was conducted to assess the feasibility of violinists playing with EC every day for two weeks. Six violinists who usually played with SR were included and asked to divide their daily playing time equally between SR and WSR. Feasibility outcomes were measured as adherence (days), compliance (playing hours per day) and usability (5-point Likert scale and open-ended questions). Compliance was achieved with a minimum of 25% playing time.

RESULTS

Daily violin playing with EC showed high adherence of 89.3%. Compliance with the 25% play time criterion was met for SR, but not for WSR. Low playing performance (median 45.8 points difference), long confidence time (two violinists failed to reach a confidence level) and mainly negative feedback (26 out of 33 comments) were found in WSR compared to SR.

CONCLUSIONS

The feasibility of playing WSR was low and negatively impacted playing performance. As a result, a larger-scale study will only evaluate the EC with SR due to greater feasibility.

The effects of an ergonomic chinrest among professional violin players. A biomechanical investigation in a randomised crossover design

This study aimed to compare violinists' upper body kinematics and muscle activity while playing with different supportive equipment: their usual chinrest (UC) or an ergonomic chinrest (EC), each mounted on the violin. Three-dimensional motion capture and electromyographic data were acquired from the upper body while 38 pain-free professional violinists performed an excerpt of a music piece. There were only minor differences between the two set-ups tested. The EC resulted in less left rotation of the head (3.3°), slightly more neck extension (1.3°) and less muscle activity (0.5-1.0 %MVE). However, the overall high static muscle activity (4-10 %MVE across all muscles) was maintained using EC. For both setups, the head posture was left-rotated >15°, ≤6° flexed and left-bent 90% of the time. The EC did not produce a substantial difference in biomechanical load. Instead, future studies may focus on aspects other than chinrest design to lower the static workload demands.

Effects of different violin playing techniques on workload in forearm and shoulder muscles

Due to their working position, violinists are more prone to musculoskeletal pain than other instrumentalists. Playing the violin may cause increased activity in the shoulder and forearm muscles due to techniques such as vibrato (pitch variation), double-fingering (thirds), and changes in speed and volume (piano and forte). This study investigated how the different violin techniques affect muscle activity while playing scales and a music piece. Surface EMG was recorded bilaterally from the upper trapezius and forearm muscles in 18 violinists. Increased playing speed followed by playing with vibrato was the most demanding task affecting the left forearm muscles. Playing forte was the most demanding factor for the right forearm muscles. The music piece and the grand mean of all techniques showed similar workload demands. These results show that specific techniques require higher workload demands and should be considered when planning rehearsals with these techniques as a part of injury prevention.

Determining factors for compensatory movements of the left arm and shoulder in violin playing

Introduction

Despite a large number of available ergonomic aids and recommendations regarding instrument positioning, violin players at any proficiency level still display a worrying incidence of task-specific complaints of incompletely understood etiology. Compensatory movement patterns of the left upper extremity form an integral part of violin playing. They are highly variable between players but remain understudied despite their relevance for task-specific health problems.

Methods

This study investigated individual position effects of the instrument and pre-existing biomechanical factors likely determining the degree of typical compensatory movements in the left upper extremity: (1) left elbow/upper arm adduction ("Reference Angle α", deviation from the vertical axis), (2) shoulder elevation ("Coord x", in mm), and (3) shoulder protraction ("Coord y", in mm). In a group of healthy music students (N = 30, 15 m, 15 f, mean age = 22.5, SD = 2.6), "Reference Angle α" was measured by 3D motion capture analysis. "Coord x" and "Coord y" were assessed and ranked by a synchronized 2D HD video monitoring while performing a pre-defined 16-s tune under laboratory conditions. These three primary outcome variables were compared between four typical, standardized violin positions varying by their sideward orientation ("LatAx-CSP") and/or inclination ("LoAx-HP") by 30°, as well as the players' usual playing position. Selected biomechanical hand parameter data were analyzed as co-factors according to Wagner's Biomechanical Hand Measurement (BHM).

Results

Mean "Reference Angle α" decreased significantly from 24.84 ± 2.67 to 18.61 ± 3.12° (p < 0.001), "Coord x" from 22.54 ± 7.417 to 4.75 ± 3.488 mm (p < 0.001), and "Coord y" from 5.66 ± 3.287 to 1.94 ± 1.901) mm (p < 0.001) when increasing LatAx-CSP and LoAx-HP by 30°. Concerning the biomechanical co-factors, "Reference Angle α", "Coord y", but not "Coord x", were found to be significantly increased overall, with decreasing passive supination range (r = -0.307, p = <0.001 for "Passive Supination 250 g/16Ncm", and r = -0.194, p = <0.001 for "Coord y"). Compensatory movements were larger during tune sections requiring high positioning of the left hand and when using the small finger.

Discussion

Results may enable to adapt individually suitable instrument positions to minimize strenuous and potentially unhealthy compensation movements of the left upper extremity.

The structure of occupational diseases in first-third-year piano students

BACKGROUND

The aim is to analyze the structure of occupational diseases in first-third year piano students studying.

METHODS

A total sample of 300 individuals participating in the research process underwent a complete medical examination at the end of each academic year.

RESULTS

Among piano students, number of those distributed to special medical groups for health reasons grew from 14 to 38% (p ≤ 0.02). The incidence of diseases of the muscular system increased from 58 to 71% (p ≤ 0.05), with the sharpest rise during the transition from the second to the third year of study. Similar tendencies were obtained for the incidence of hand-related diseases-their overall frequency advanced from 17 to 23% (p ≤ 0.05). The surge of morbidity in the transition from the second to the third year of study can be attributed to the increased educational load experienced by students during this period, as they begin to practice music intensively after theoretical classes. Сorresponding measures directed at preventing occupational diseases, bettering physical education, expanding the rest intervals between piano lessons are to be taken.

CONCLUSIONS

The research results indicate that the main occupational diseases of piano students are those related to hands and muscular system.

IMPACT

The obtained data suggest that the range of diseases is likely to progress throughout the musical training. The main diseases of piano students are those related to hands and muscular system. The sharpest rise was during the transition from the 2nd to the 3rd year of study.

Different Music Training Modulates Theta Brain Oscillations Associated with Executive Function

Different music training involves different hand coordination levels and may have a significant influence on brain oscillation for the executive function. However, few research has focused on the plasticity of executive function and the brain oscillation modulated by different musical instrument training modules. In this study, we recruited 18 string musicians, 20 pianists, and 19 non-musicians to perform a bimanual key pressing task during EEG recording. Behavioral results revealed that pianists have the highest accuracy and the shortest response time, followed by string musicians and non-musicians (p < 0.05). Time-frequency analyses of EEG revealed that pianists generated significantly greater theta power than the other groups from 500 ms to 800 ms post-stimulus in mid-central, frontal brain areas, and motor control areas. Functional connectivity analyses found that the pianists showed significantly greater connectivity in the frontal-parietal area in theta band based on phase-locking value analysis, which suggests that piano training improves executive function and enhances the connectivity between prefrontal and mid-central regions. These findings contribute to a better understanding of the effects of different music training on executive function.

Multiple Factors Influencing Healthy Performance for Pre-professional and Professional Classical Violinists: An Exploratory Study Focusing on Physical Health

Musculoskeletal complaints are common in pre-professional and professional classical violinists and these complaints can affect violinists' performance. Therefore, it is important to identify the factors that contribute to healthy performance in this population. Qualitative studies with a variety of stakeholders are able to provide insights from different perspectives into factors influencing healthy performance for the pre-professional and professional classical violinist. In the current small-scale, exploratory study, semi-structured interviews were conducted with various stakeholders; two classical violin students, one classical violin teacher, a physiotherapist, a professional classical violinist, who is also a performance coach, and a health specialist who also graduated as a professional classical violist. Thematic analysis was conducted using Atlas.ti 9. We identified six themes that were indicated as important by the participants in terms of ensuring healthy performance for the pre-professional and professional classical violinist. The themes were: (1) physical aspects (involved in playing the violin); (2) practice routine and techniques; (3) interaction between physical and mental aspects; (4) culture; (5) role of the main subject teacher; and (6) preventive measures. Furthermore, when asked specifically about the development of a physical screening tool, the participants indicated that such a tool should include multiple factors covering various regions of the body, the inclusion of a questionnaire on risk-factors, and follow-up measurements. Also, collaborations between health professionals and main subject teachers were recommended as part of the screening tool to increase commitment of participating students. The results of the current study are based on the opinions, attitudes, and ideas of a small, selected group of participants only and cannot be generalized to a wider group of violinists. More research is needed regarding factors influencing healthy performance, before conservatoires and professional orchestras can develop programs for a healthy playing environment for pre-professional and professional violinists.

Comparison of the effectiveness of a structured exercise program on nonspecific neck pain in string and woodwind players

To investigate the effect of a structured exercise training program on pain, functional status, physical function and quality of life (QoL) in string and woodwind players with nonspecific cervical pain. This study had a prospective cohort design and conducted on 40 musicians (26 male, 14 female) aged between 18 and 65 years with persistent nonspecific neck pain in the previous 3 months. Forty musicians were assigned to either violin (n = 20, median age; 26.5 year, height; 1.67 m, body mass; 65 kg, BMI; 23.04 kg/m²) or ney group (n = 20, median age; 27.5 year, height; 1.81 m, body mass; 75 kg, BMI; 23.35 kg/m²) and followed the same structured exercise program (3 days/per week for 8 weeks). The primary outcome was neck pain intensity and assessed on a visual analog scale (VAS). Secondary outcomes; cervical range of motion (ROM) was measured using a goniometer, the jaw-to-sternum and jaw-to-wall distances were used for the assessment of cervical mobility, neck, shoulder and back muscles strength were assessed with a hand-held dynamometer, the Northwick Park Neck Pain and Short Form 36 (SF-36) questionnaires were also used. Normality of data distribution was checked using the Kolmogorov-Smirnov test. For evaluating the training effectiveness on outcome measures, Mann-Whitney U and Wilcoxon test were used compare pre-test and post-test values with/within groups, respectively. The primary outcome (pain intensity) was lowered %33 in both groups. However, the mean change was found similar (median mean changes; -2 for both groups) (p > 0.05). The secondary outcomes; cervical mobility, cervical flexion ROM, disability and muscle strength of the left middle trapezius, left hand grip, anterior and middle parts of the right deltoid, and cervical flexors also significantly improved in both groups (p < 0.05). Only the mean changes of right serratus anterior, middle trapezius and cervical flexor muscles were higher in violin group than ney group (p < 0.05). There was no significant difference in the cervical extension, right rotation, left rotation, right lateral flexion and left lateral flexion after the treatment in both groups (p > 0.05). There was no significant difference between the groups after the exercise program in terms of pain, mobility, range of motion and SF-36 subdomains (p > 0.05). Specific exercise program had similar positive effects on pain, cervical mobility, cervical fexion ROM and disability in string and woodwind players. Although several muscles showed similar improvements in strength, some muscle groups recovered differently. Physical needs specific to the instrument and performance should be taken into account when prescribing exercises to musicians having the same problem, but playing different instruments.

Biomechanical analysis of the right elevated glenohumeral joint in violinists during legato-playing

BACKGROUND

Many statistics reveal that violin players suffer most often from musculoskeletal disorders compared to musicians of other instrument groups. A common phenomenon, especially observed in violin beginners, is the tendency to elevate the right shoulder during playing the violin. This can probably lead to serious disorders in long-term practice with repetitive movements.

OBJECTIVE

For this reason, this study investigated the relationship between the right shoulder elevation and the force in the right glenohumeral joint during violin playing. It was hypothesized that the forces in the right glenohumeral joint are higher during playing with the right shoulder raised compared to playing in normal posture.

METHODS

Motion capture data from four experienced violinists was recorded and processed by means of musculoskeletal simulation to get the force and elevation angle while playing with raised shoulder and in normal position.

RESULTS

The results indicate that the absolute values of the resulting force, as well as the forces in the mediolateral, inferosuperior, and anteroposterior directions, are higher in playing the violin with the shoulder raised than in a normal posture.

CONCLUSIONS

Elevating the right shoulder while playing the violin may pose a potential problem.

A musician-centered approach to management of performance-related upper musculoskeletal injuries

STUDY DESIGN

Invited Clinical Commentary BACKGROUND: Performance related musculoskeletal disorders (PRMD) are common in instrumental musicians and often affect the upper extremities. These overuse injuries typically result from inadequate attention to the musculoskeletal demands required for the high-level performance of musician-students and experienced instrumentalists.¹ PRMDs often interfere with career trajectory, and in extreme cases, can be career ending. Many clinicians and healthcare practitioners treating upper extremity injuries are not familiar with the specific demands faced by instrumental musicians and how to tailor treatment and prevention strategies to the specific risks and occupational needs of each instrumental group.

PURPOSE OF THE STUDY

This paper describes an evidenced-based framework for the assessment, prevention, and treatment of musculoskeletal musician injuries to provide clinicians with an instrument-specific, and musician-centered guide for practice. We synthesized available literature on instrumental ergonomics, biomechanical demands, and upper extremity injuries to highlight the risks and common upper-extremity pathologies, focusing on the specific demands of instrumental groups: piano, high strings (violin and viola), low strings (cello and bass), percussion, woodwinds, and brass. Targeted assessment, prevention, and treatment strategies are reviewed in this context to provide healthcare providers with an evidence-based framework to approach the treatment of PRMD to mitigate incidence of injury during practice and performance.

METHODS

A comprehensive search of electronic databases was conducted including all study designs.

RESULTS

This review describes risk factors for PRMD in instrumental musicians, strategies to prevent misuse and performance injury, and musician-centered interventions to allow playing while reducing risk of misuse.

CONCLUSION

The suggested assessment and treatment framework can assist clinicians with a customized patient-centered approach to prevention and treatment by addressing the gap in clinical knowledge with the goal of ultimately reducing the incidence and severity of PRMD in musicians.

Leveraging implementation science to prevent and reduce musculoskeletal overuse injury in musicians: A proposal for the study of a conceptual framework

BACKGROUND

Musician health and wellness, a fundamental requirement for safe, effective and optimal musical performance, is not guaranteed. Performance related musculoskeletal disorders (PRMD) affect between 60% and 90% of all musicians, and have serious consequences on musculoskeletal health, performance ability and the overall healthcare burden of musculoskeletal injury. The high prevalence of PRMD in musicians can be prevented and reduced via health-education programs designed to address risk factors and practice habits. Multiple studies demonstrate the efficacy of education and instructional exercises in reducing PRMD symptoms in musicians. Despite the awareness of risk and the substantial consequence of non-adherence, implementation of health-education programs is complex and challenging and is rarely offered in music institutions. For successful adoption of musculoskeletal health programs, it is important to identify system level barriers and facilitators and it is important to develop and pilot effective strategies to guide successful implementation of musculoskeletal health programs for musicians.

PURPOSE

This paper proposes a conceptual framework using implementation science methodology to study the factors that influence adoption of musician health education programs to prevent performance related injury. The overall goal of this methodology is to identify determinants of implementation by engaging key stakeholders, developing strategies for adoption of injury prevention programs and generate hypotheses for future studies.

METHODS

The research plan is designed to accomplish the specific aims of this study. Through a mixed-method study we will use qualitative and quantitative methods to address potential barriers, and design and test implementation feasibility of health-education programs for musicians.

RESULTS/CONCLUSIONS

Our findings will inform the development of a large-scale participant randomized hybrid trial to assess effectiveness and implementation outcomes of health education programs and ultimately reduce injury and promote musculoskeletal longevity and performance in musicians.

Feasibility and impact of a musculoskeletal health for musicians (MHM) program for musician students: A randomized controlled pilot study

BACKGROUND

There is a high incidence of performance-related musculoskeletal disorders in musicians that may be reduced via education programs. However, the efficacy of formalized injury prevention programs has not been rigorously studied.

PURPOSE

To assess the feasibility and effect of a formalized injury prevention education workshop on incidence and severity of musculoskeletal pain in a cohort of musician-students attending an intensive summer music festival compared to controls.

STUDY DESIGN

Randomized-controlled-pilot trial.

METHODS

Musicians at an 8-week long intensive summer festival were randomized to an intervention (workshop) or control group. Workshop attendees participated in a 90-minute session of injury prevention strategies. Musculoskeletal outcome data were collected at the start and end of the festival. Outcomes included presence of musculoskeletal pain, adherence level, and sub-scales of the Musculoskeletal Pain Intensity and Interference Questionnaire for Musicians.

RESULTS

A total of 57 musician-students (ages 17-30, 23 females) participated in the study, and 48(84%) completed the study. Seventy-five percent of workshop participants reported adherence over 8 weeks. At baseline, 84% of participants reported a history of playing-related pain, and 47% recent or current pain. Participants played a range of instruments (50% string, 34% piano, 16% woodwind/brass). At baseline, average weekly reported playing time was 39 hours (±11). At follow-up, reported pain decreased by 32% in the intervention group and increased by 8% in controls (P < .01). Pain interference scores were lower (Post - Pre = -4.58, 95% CI -9.26 to 0.11, P = .055). There was no statistically significant difference between groups for pain intensity.

CONCLUSIONS

The high compliance and willingness to participate suggests that injury prevention education implementation is feasible. Our preliminary findings suggest a positive effect on pain incidence and pain interference in the intervention group. Future studies will examine the relationship between adherence levels and injury rates in a larger cohort and identify obstacles to implementation.

The effectiveness of Kinesio taping on playing-related pain, function and muscle strength in violin players: A randomized controlled clinical trial

OBJECTIVES

This study aimed to investigate the effectiveness of Kinesio taping (KT) on playing-related pain, upper extremity and hand function, grip and pinch strength in violin players.

DESIGN

Randomized controlled trial.

SETTING

Faculty of health sciences.

PARTICIPANTS

One hundred seventeen participants who were professional violinists for at least two years (82 women; mean age, 22.76 ± 3.87 years) were randomized to receive either therapeutic tape application (KT group), a sham tape application (placebo group), or no application (control group) for one week.

OUTCOME MEASURES

The primary outcome was the Disabilities of the Arm, Shoulder and Hand (DASH) in one week. The secondary outcomes were the Visual Analogue Scale (VAS), the Purdue Pegboard Test, grip and pinch strength. Outcome measures were performed at baseline, immediately after the intervention, and one week later (follow-up). Participants were asked to play the "Violin Concerto No.2, Op.35 (Rieding, Oskar)"; pre-and post-performance pain and grip and pinch strength were assessed.

RESULTS

The overall group-by-time interaction was not significant for DASH, but the improvement in the mean VAS-playing was slightly better in the KT group than in others (p < 0.05). The mean post-performance VAS-playing remained similar in the KT group while slightly increasing in the other groups (p < 0.05). In addition, a decrease in the mean post-performance grip strength of the left hand was significantly lower in the KT group than in the other groups (p < 0.05).

CONCLUSIONS

Violin players receiving an application of KT represented minor improvements in playing-related pain, and post-performance pain intensity and grip strength of the left hand slightly remained after 1 week kT application. The possible post-performance effect of the tape on the pain intensity and grip strength must also be considered because KT can be used during the performance.

How Do Violinists Adapt to Dynamic Assistive Support? A Study Focusing on Kinematics, Muscle Activity, and Musical Performance

OBJECTIVE

Assessing violinists' motor and musical performance adaptations to dynamic assistive support (DAS) provided by a passive device, using a force-field adaptation paradigm.

BACKGROUND

Up to 93% of instrumentalists are affected by musculoskeletal injuries and particularly violinists. The repetitive nature of their work may lead to muscle fatigue, an injury risk factor. DAS has been used in occupational settings to minimize muscle activations and limit fatigue accumulation. DAS may however affect motor and musical performance.

METHOD

Fifteen expert violinists were equipped with reflective markers and surface and intramuscular electromyography (EMG) sensors. Movements, muscle activations, and sound were recorded while participants completed three experimental conditions for which they continuously played a 13-s musical excerpt: Control (no DAS), Adaptation (DAS), and Washout (no DAS). DAS was applied at the left elbow (violin-holding side). Conditions were repeated 1 week later. Participants later listened to their own audio recordings playing with and without DAS and blindly assessed their performances. Linear mixed models were used to compare DAS and no-DAS conditions' kinematic, EMG, and musical performance data.

RESULTS

DAS perturbed user kinematics but reduced mean activations of left medial deltoid and superior trapezius. Joint kinematic and muscle activation patterns between DAS and no DAS conditions however remained similar. Musical performance was unchanged with DAS.

CONCLUSION

Though DAS modified violinists' upper-limb configurations, resulting kinematics were not detrimental to musical performance. Reduced muscle activations with DAS could contribute to lessening muscle fatigue.

APPLICATION

Although its effect on muscle fatigue should be further investigated, DAS might be useful in preventing violinists' injuries.

A Physiotherapeutic Approach to Musicians' Health - Data From 614 Patients From a Physiotherapy Clinic for Musicians (INAP/O)

Currently, the treatment of musicians is an interprofessional approach. Playing-related health complaints may impact the performance of a musician. In Germany, a medical consulting hour for musicians exists, but those for athletes in sports medicine are not so common. The diagnosing and treatment procedure within the physiotherapy consultation for musicians follows a specific concept-b and requires knowledge of instruments and musician-specific complaints. Based on the consulting hour in a clinic in Osnabrueck, 614 case reports were part of this sample, of which 558 data sets were complete. The focus of the analysis is the instrument and the primary complaint. Also, the type of therapy is characterized, and the amount is calculated. Primary complaints of musicians, in general, are found most frequently in the spine and upper extremity. Musician complaints are different between instruments. Instrumentalists have a significantly higher chance to suffer from a primary complaint in the area of the upper extremity. Furthermore, the groups without an instrument (e.g., singing or dancing) are developing complaints in the anatomical area which they primarily use. Therefore, these types of therapy were used: physiotherapy, manual therapy, and osteopathy with an average of 5.9 treatment units. This study underpinned the importance of musician-specific physiotherapy as a profession to treat musicians. Also, an interdisciplinary approach is necessary to treat all aspects of complaints.

The effect of osteopathic medicine on pain in musicians with nonspecific chronic neck pain: a randomized controlled trial

Background:

Nonspecific chronic neck pain (cNP) is common in adult violinists and violists and is often treated with osteopathic medicine (OM), although the effectiveness of this treatment has not been determined to date. This study aimed to evaluate the effectiveness and safety of OM in adult violinists and violists with cNP.

Methods:

In a two-armed randomized controlled single-center open trial, adult violinists and violists, including music students, with cNP (⩾12 weeks) were randomized to either five individualized OM sessions (OM group) or to no intervention (control group, CG) in the outpatient clinic for integrative medicine, Charité - Universitätsmedizin Berlin, Germany. All patients received a musicians’ medicine consultation and paracetamol on demand. The primary outcome parameter was the neck pain intensity on a visual analog scale (VAS, 0–100 mm, 0 = no pain, 100 = worst imaginable pain) after 12 weeks. Secondary outcomes included neck pain disability (Neck Disability Index, NDI, 0–100%) after 12 weeks. The last follow-up visit was after 52 weeks. Statistical analysis included analysis of covariance adjusted for respective baseline value.

Results:

Altogether, 62 outpatients were included [OM group (n = 28), CG (n = 34); 81% female; mean age, 41.6 ± 11.1 years; mean baseline neck pain, 55.9 ± 11.6 mm]. After 12 weeks, OM was associated with an improvement in the OM group versus the CG in neck pain on the VAS [14.6 mm (95% confidence interval 8.0; 21.2) versus 40.8 mm (34.7; 46.9), p < 0.001, Cohen’s d = 1.4], and neck pain disability as determined by the NDI [8.8% (6.7; 10.8) versus 17.2% (15.3; 19.1), p < 0.001]. Some improvements were maintained until 52 weeks of follow-up. No serious adverse events were observed.

Conclusions:

The results of this study suggest that OM might be effective in reducing pain intensity in adult violinists and violists with nonspecific cNP. Further studies should investigate the efficacy of OM in comparison with a sham procedure and with other effective therapy methods in high-quality multicenter trials.

Trial registration:

WHO Trial Registration https://apps.who.int/trialsearch/NoAccess.aspx?aspxerrorpath=/trialsearch/Trial2.aspx by German Clinical Trials Register DRKS00009258, Universal Trial Number (UTN): U1111-1173-5943.

Surface electromyography of forearm and shoulder muscles during violin playing

The aims of this study were to explore muscle activity levels during different violin repertoires, quantify the general levels bilaterally in upper extremity muscles, and evaluate associations between muscle activity and anthropometrics characteristics. In 18 skilled violin players surface EMG was recorded bilaterally from trapezius (UT), flexor digitorum superficialis (FDS), extensor carpi ulnaris (ECU), extensor digitorum cummunis (EDC), and extensor carpi radialis (ECR) during A and E major scales played in three octaves and Mozart's Violin Concerto no. 5. To compare side differences the static, median and peak levels of muscle activity were calculated from an amplitude probability distribution function (APDF). This study demonstrated that scales played as standardized tasks can be used to estimate the average muscle activity during violin playing. Comparing results from scales and the music piece revealed a similar muscle activity across all muscles in the music piece and E major scales. The static, median and peak EMG levels were higher in left than in right forearm muscles with left ECU presenting the highest peak load of 30 %MVE. Females demonstrated a higher muscle activity than males, but this was in accordance with differences in anthropometric measures.

How does the Execution of the Pilates Method and Therapeutic Exercise Influence Back Pain and Postural Alignment in Children Who Play String Instruments? A Randomized Controlled Pilot Study

BACKGROUND

Inappropriate posture in children while playing some string instruments can cause back pain and alterations of the spine. To date, there is no research on the effect of exercise on children who play a musical instrument, although it is known that transversus abdominis muscle control through the Pilates method has shown pain reduction and posture improvement in this population.

OBJECTIVE

To assess the effectiveness of the Pilates method combined with therapeutic exercise with respect to therapeutic exercise exclusively in reducing pain and improving postural alignment in children playing string instruments applying a protocol of low dose to increase children's adherence to training.

METHODS

A randomized controlled pilot study was designed with two parallel intervention groups. Twenty-five children (10-14 years old) were randomized in two intervention groups: Pilates method with therapeutic exercise (experimental) and therapeutic exercise (control) for 4 weeks (50 min per day, one day per week). Two assessments were performed (before and after treatment) to assess back pain and shoulders and hips alignment using a visual analog scale and the Kinovea program.

RESULTS

Statistically significant differences were obtained for pain reduction before (p = 0.04) and after (p = 0.01) playing the instrument in the experimental group. There were no significant changes in alignment improvement in any of the two groups.

CONCLUSION

The application of a low dose of the Pilates method combined with therapeutic exercise could be a beneficial intervention for pain reduction before and after musical practice in children who play string instruments.

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.

Improving the High-Frequency Response of PEI-Based Earphone with Sodium Copper Chlorophyllin

The polyetherimide diaphragm, sodium copper chlorophyllin (SCC), and copper ion coating composite used on earphones were observed to improve the high-frequency (10k–14k Hz) performance. This reinforcement phenomenon was expected to make the sound experience brighter and more diverse. By SEM observation, the mixed coating of SCC/Cu²⁺ on the polyethylenimine (PEI) diaphragm exhibited a planar blocky structure and was tightly bonded to the surface of the PEI polymer without the aid of colloids. The endothermic process of SCC and metal ion complexation was analyzed by isothermal titration calorimetry. The association ratios of SCC/Cu²⁺ and SCC/Ni²⁺ were 4/1 and 6/1, respectively, and the SCC/Cu²⁺ association yielded a stronger binding constant and more free energy. It was expected that the SCC/Cu²⁺(4/1) mixed liquid would be immobilized on the PEI polymer by multivalent interaction, including hydrogen-bonding networks between carboxyl groups of SCC and amine groups of PEI, and cross-linking of bridging copper ions. We used dimethylethylenediamine (DME) monomer instead of PEI polymer to analyze this multivalent interaction and observed a two-stage exothermic association of SCC/Cu²⁺(4/1) and DME with a total Gibbs free energy of 15.15 kcal/mol. We observed that the binding energy could be used to explain that the SCC/Cu²⁺ mixed formulation could be fixed on the surface of the PEI polymer and could enhance the strength of the PEI film. Compared with graphene films, which can continuously improve the performance of high and ultrasonic frequencies, this study was devoted to and was initiated for the purpose of applying porphyrin compounds to improve music performance.