Researchers at the University of Kentucky are inviting you to participate in a sports related concussion study. Participants will complete surveys that will review self-reported injury history and other outcome variables. Participants will then have a morning fasting blood sample collected from the arm. After the blood is drawn, the participants will complete a bone health assessment. Participants will also complete a 24 hour dietary recall on two separate occasions for one week. All participants will be compensated for their time.

You may be eligible if you:

• Are 18-25 years old
• Are physically active
• Do not have a concussion, injury or health condition that can affect bone health