Early Exercise to Improve Psychosocial Function After Pediatric Mild Traumatic Brain Injury

The investigators will test the central hypotheses according to the following Specific Aims: Aim 1. Determine if an individually prescribed exercise program initiated within the first week of mild traumatic brain injury can reduce the risk of developing persistent post-concussion symptoms relative to usual care. The investigators hypothesize that the exercise group will have a lower risk of developing persistent post-concussion symptoms than the usual care group. Aim 2. Examine the effect of a two-month exercise program on psycho-social, pain interference, and sleep outcomes following mild traumatic brain injury. The investigators hypothesize the exercise group will report lower anxiety, depression, and pain interference ratings, and higher peer relationship and sleep quality ratings two months of exercise following mild traumatic brain injury compared to usual care.