A competitor stresses during CrossFit Integrity, the Charleston CrossFit games Oct. 6, 2012, in Charleston, S.C. The fitness program CrossFit is growing in popularity everyday as even the military has integrated it into their physical fitness regimen.

- Image ID: FFH0M9
A competitor stresses during CrossFit Integrity, the Charleston CrossFit games Oct. 6, 2012, in Charleston, S.C. The fitness program CrossFit is growing in popularity everyday as even the military has integrated it into their physical fitness regimen.
LOU Collection / Alamy Stock Photo
Image ID: FFH0M9