Department of Sports Orthopaedics, Technical University of Munich, Ismaninger Straße 22, 81675, Munich, Germany.
Department of Orthopaedics, Emory University, Atlanta, GA, USA.
BMC Musculoskelet Disord. 2022 Jun 22;23(1):599. doi: 10.1186/s12891-022-05546-9.
Distal biceps tendon ruptures can lead to significant restrictions in affected patients. The mechanisms of injury described in scientific literature are based exclusively on case reports and theoretical models. This study aimed to determine the position of the upper extremities and forces involved in tendon rupture through analyzing video recordings.
The public YouTube.com database was queried for videos capturing a clear view of a distal biceps tendon rupture. Two orthopedic surgeons independently assessed the videos for the activity that led to the rupture, the arm position at the time of injury and the forces imposed on the elbow joint.
Fifty-six video segments of a distal biceps rupture were included (55 male). In 96.4%, the distal biceps tendon ruptured with the forearm supinated and the elbow isometrically extended (non-dynamic muscle engagement) (71.4%) or slightly flexed (24%). The most common shoulder positions were adduction (85.7%) and neutral position with respect to rotation (92.9%). Most frequently a tensile force was enacted on the elbow (92.9%) and the most common activity observed was deadlifting (71.4%).
Distal biceps tendon ruptures were most commonly observed in weightlifting with a slightly flexed or isometrically extended elbow and forearm supination. These observations may provide useful information for sports specific evidence-based injury prevention, particularly in high performing athletes and individuals engaged in resistance training.
Observational study.
肱二头肌肌腱远侧部断裂可导致患侧活动受限。文献中描述的损伤机制仅基于病例报告和理论模型。本研究旨在通过分析视频记录来确定导致肌腱断裂的上肢位置和受力情况。
在公共的 YouTube.com 数据库中搜索可清晰观察到肱二头肌肌腱远侧部断裂的视频。两名骨科医生独立评估导致断裂的活动、受伤时手臂的位置以及施加在肘关节上的力。
共纳入 56 段肱二头肌远侧部断裂的视频（55 名男性）。96.4%的情况下，肱二头肌肌腱在旋后、肘关节等长伸展（非动力性肌肉收缩）（71.4%）或稍弯曲（24%）时断裂。最常见的肩部位置是内收（85.7%）和中立位（92.9%）。大多数情况下，肘关节承受拉力（92.9%），最常见的观察到的活动是举重（71.4%）。
在举重时，肱二头肌肌腱远侧部断裂最常见，此时肘关节稍弯曲或等长伸展，前臂旋后。这些观察结果可能为特定于运动的基于证据的损伤预防提供有用信息，特别是在高表现运动员和从事抗阻训练的个体中。
观察性研究。
