Virtual Neuromuscular Training Among Physically Active Young Adults: A Feasibility Study

Context : Evidence indicates a 2 to 3 times increased risk of musculoskeletal injury after return to play from concussion. Undetected neuromuscular control de fi cits at return to play may relate to increased musculoskeletal injury risk. Rehabilitation to improve neuromuscular control may bene fi t patients with concussion, but access to rehabilitation professionals and/or poor adherence may limit ef fi cacy. Our purpose was to determine the feasibility of an 8-week virtual neuromuscular training (NMT) program administered through a novel smartphone application among physically active, uninjured adults. Design : Feasibility trial. Methods : Participants were instructed to complete an NMT program administered via a smartphone application and returned for follow-up questionnaires 8 weeks later. They were instructed to complete 3 asynchronous self-guided workouts per week during the 8-week intervention period. Workouts included balance, plyometrics, strengthening, and dual-task exercises. The application provided instructions for each exercise using video, text, and audio descriptions. Our primary feasibility measure was participant adherence, calculated as the percentage of workouts completed out of the total possible 24 workouts. We recorded the average duration of each workout using start/stop/advance features within the application. Results : Twenty participants were enrolled, of which 15 (age = 26.3 [2.7] y, 67% female) returned for follow-up (75% retention). Participant adherence was 57.2% (25.0%; range: 16.7% - 91.7%). Participants spent 17.3 (8.0) minutes per workout (range: 7.4 - 37.9 min). There were no adverse reactions or injuries. Most participants (60%) reported time availability as a primary barrier to intervention completion. Conclusions : Participants were moderately ( > 50%) adherent to a virtual NMT program, without any reported injuries. We identi fi ed several barriers to participation and pathways for improved adherence in the future. The virtual NMT program completed by uninjured adults provides evidence of its feasibility and future scalability to those with a recent concussion to address neuromuscular control de fi cits and reduce future injury risk.