After recruitment, subjects will have neck strength measured as baseline in addition to doing SCAT5 for baseline and eye tracking, funding pending, in order to compare later assessment for concussion. Throughout study, subject will perform basic, unweighted and weighted neck strengthening exercises twice a week. Periodic re evaluations of neck strength will be performed in order to determine progress. Any time a subject incurs a sports related concussion, a SCAT5 assessment, and eye tracking funding pending, will be done and compared to baseline to measure severity of injury. Weekly follow ups will be done to assess duration of concussion. All measurements, assessments, and exercises are non-invasive and provide minimal risk to subjects.