Published in:
Open Access
01-12-2022 | Research
Distal biceps tendon ruptures occur with the almost extended elbow and supinated forearm – an online video analytic study
Authors:
Sebastian Lappen, Sebastian Siebenlist, Pavel Kadantsev, Maximilian Hinz, Jesse Seilern und Aspang, Patricia M. Lutz, Andreas B. Imhoff, Stephanie Geyer
Published in:
BMC Musculoskeletal Disorders
|
Issue 1/2022
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Abstract
Background
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.
Methods
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.
Results
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%).
Conclusion
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.
Level of evidence
Observational study.