Abstract：
BACKGROUND: High-string players, such as violinists and violists, are prone to neck problems. One factor can be their body posture, with often a rotated and flexed neck position with the jaw placed on a flat chinrest. The Kréddle chinrest (EC) was specifically designed to promote a more neutral neck position and prevent musculoskeletal problems among high-string players. This case report aims to evaluate the preliminary feasibility and acceptability of using the EC, with a low shoulder rest, in a pain-free professional high-string player. A secondary aim was to register newly developed pain and fatigue.
METHODS: A 32-year-old professional viola player was instructed to use the EC for most of her playing time during a 6-week trial period. Outcome measures such as compliance (% of use out of total playing time over the last 7 days), performance, comfort and acceptability were assessed at baseline and at the end of each trial week. The Rapid Upper Limb Assessment (RULA) tool was used to evaluate the body posture at baseline when using the EC versus her own chinrest and shoulder rest.
RESULTS: The initial trial period was interrupted after 2 days due to pain. A second 6-week period was completed. While compliance was high and there was positive feedback on how the EC affected her performance and comfort while holding the instrument, the case report identified a challenge with the complex instruction material, which made it difficult to install and adjust the product. The viola player was positive towards using EC in the end despite pain and fatigue during the trial period.
CONCLUSIONS: This case report examined a professional viola player\'s 6-week experience with an EC. While positive outcomes were observed in posture, performance, and product acceptance, issues with complex instructions were noted. This study marks the first exploration of individual challenges with EC use.
METHODS: A 32-year-old professional viola player was instructed to use the EC for most of her playing time during a 6-week trial period. Outcome measures such as compliance (% of use out of total playing time over the last 7 days), performance, comfort and acceptability were assessed at baseline and at the end of each trial week. The Rapid Upper Limb Assessment (RULA) tool was used to evaluate the body posture at baseline when using the EC versus her own chinrest and shoulder rest.
RESULTS: The initial trial period was interrupted after 2 days due to pain. A second 6-week period was completed. While compliance was high and there was positive feedback on how the EC affected her performance and comfort while holding the instrument, the case report identified a challenge with the complex instruction material, which made it difficult to install and adjust the product. The viola player was positive towards using EC in the end despite pain and fatigue during the trial period.
CONCLUSIONS: This case report examined a professional viola player\'s 6-week experience with an EC. While positive outcomes were observed in posture, performance, and product acceptance, issues with complex instructions were noted. This study marks the first exploration of individual challenges with EC use.
摘要：
背景：高弦玩家，比如小提琴家和小提琴家，容易出现颈部问题。一个因素可能是他们的身体姿势，通常是旋转和弯曲的颈部位置，下巴放在平坦的下巴上。Kréddlechinrest（EC）专门设计用于促进更中性的颈部位置，并防止高弦球员的肌肉骨骼问题。本病例报告旨在评估使用EC的初步可行性和可接受性。有一个低肩膀休息，在一个无痛的职业高弦球员中。次要目的是记录新出现的疼痛和疲劳。
方法：一名32岁的专业中提琴演奏者被指示在6周的试验期间的大部分演奏时间内使用EC。结果衡量指标，如合规性（过去7天使用占总播放时间的百分比），性能，在基线和每个试验周结束时评估舒适度和可接受性.快速上肢评估（RULA）工具用于在使用EC与她自己的下巴和肩托时评估基线时的身体姿势。
结果：由于疼痛，初始试验周期在2天后中断。第二个6周的时间已经完成。虽然合规性很高，并且对EC在握住仪器时如何影响她的表现和舒适度有积极的反馈，病例报告确定了复杂指导材料的挑战，这使得很难安装和调整产品。尽管在试验期间疼痛和疲劳，中提琴演奏者最终还是对使用EC持积极态度。
结论：本病例报告检查了一名专业中提琴演奏者6周的EC经验。虽然在姿势中观察到积极的结果，性能，和产品验收，注意到复杂指令的问题。这项研究标志着首次探索使用EC的个人挑战。
方法：一名32岁的专业中提琴演奏者被指示在6周的试验期间的大部分演奏时间内使用EC。结果衡量指标，如合规性（过去7天使用占总播放时间的百分比），性能，在基线和每个试验周结束时评估舒适度和可接受性.快速上肢评估（RULA）工具用于在使用EC与她自己的下巴和肩托时评估基线时的身体姿势。
结果：由于疼痛，初始试验周期在2天后中断。第二个6周的时间已经完成。虽然合规性很高，并且对EC在握住仪器时如何影响她的表现和舒适度有积极的反馈，病例报告确定了复杂指导材料的挑战，这使得很难安装和调整产品。尽管在试验期间疼痛和疲劳，中提琴演奏者最终还是对使用EC持积极态度。
结论：本病例报告检查了一名专业中提琴演奏者6周的EC经验。虽然在姿势中观察到积极的结果，性能，和产品验收，注意到复杂指令的问题。这项研究标志着首次探索使用EC的个人挑战。
