Senior Airman Jarad Denton sits in the BOD POD at the Langley Air Force Base, Va. Health & Wellness Center, as Tony Arroyo, HAWC exercise physiologist, starts the body composition assessment, June 1, 2012. The assessment used air displacement to calculate the body fat percentage, energy expenditure levels and total fat free mass of Denton. (U.S. Air Force photo by Senior Airman Jarad A. Denton/Released)