Diffusion tensor imaging of hamstring muscles after acute strain injury and throughout recovery in collegiate athletes.

Objective: To identify the region of interest (ROI) to represent injury and observe between-limb diffusion tensor imaging (DTI) microstructural differences in muscle following hamstring strain injury.

Materials And Methods: Participants who sustained a hamstring strain injury prospectively underwent 3T-MRI of bilateral thighs using T1, T2, and diffusion-weighted imaging at time of injury (TOI), return to sport (RTS), and 12 weeks after RTS (12wks). ROIs were using the hyperintense region on a T2-weighted sequence: edema, focused edema, and primary muscle injured excluding edema (no edema).

Course Design and Learning Outcomes of a Practical Online Ergonomics Course for Surgical Residents.

Objective: Course content was designed and the learning outcomes assessed for an online ergonomics course for surgical residents. This course could fulfill an optional Surgical Council on Resident Education (SCORE) curriculum on Surgical Ergonomics.

Design: The online course included five 5-minute modules within the residents' learning system, each ending with an ungraded knowledge question, and a final 5-question multiple-choice retention quiz that allowed infinite attempts.

Vertical Loading Rate Is Not Associated with Running Injury, Regardless of Calculation Method.

Introduction: Loading rate (LR), the slope of the vertical ground reaction force (vGRF), is commonly used to assess running-related injury risk. However, the relationship between LR and running-related injuries, including bone stress injuries (BSI), is unclear. Inconsistent findings may result from the numerous LR calculation methods that exist and their application across different running speeds.