Published on January 14, 2018
Marine Corps recruits with Lima Company, 3rd Recruit Training Battalion, Recruit Training Regiment, conduct an Initial Strength Test (IST) on Marine Corps Recruit Depot Parris Island, S.C. The IST consists of timed crunches, pull-ups or pushups, and a 1.5-mile (2.5 km) run.
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Credits: Debra Rookus | AiirSource Military Channel
