Concussions are mild brain injuries that can happen during activities like sports. When someone has a concussion, it might increase their risk of getting injuries to their muscles and bones, called musculoskeletal injuries (MSKI). This study aims to find out why this happens. Scientists think that people with concussions might move differently, leading to injuries. The study will compare people who had concussions to those who haven't to find differences in how they move. This information can help create ways to prevent these injuries.

• Length of Study: Participants will be involved for up to 1 year with assessments at specific intervals.
• Visits Needed: Participants will visit for tests three times: soon after they feel better, and 6 and 12 weeks after.
• Participant Requirements: Must be 18-40 years old and have access to email and internet for surveys.

This study involves motion tests and muscle strength measurements to understand differences between concussed and non-concussed individuals. If you had a concussion and want to help, or if you're healthy and want to be a control, consider joining!