U.S. Marine Corps photo by Lance Cpl. Crystal Druery/Released 111006-M-0000L-008.jpg
Oct 6, 2011
Gene Calantoc, Semper Fit personal trainer, uses a pilates ball during an abs class at the Marine Corps Recruit Depot San Diego Semper Fit Center Oct. 6 . Calantoc leads participants through a variety of abdominal exercises using different equipment, like medicine balls and weights, to target different core muscles. The class is held Monday through Thursday at the Semper Fit center.
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