Marine Corps Staff Sgt. Austin Tombley, left, an electro-optical ordnance repairer with 2nd Maintenance Battalion, 2nd Marine Logistics Group, instructs other students on how to do a sandbag shoulder squat during a FFI Course on Camp Lejeune, North Carolina, Jan. 30, 2024. The FFI course is made up of physical training, classroom instruction, and practical application to provide the students with structured functional exercise science in order to optimize mental and physical performance, reduce injuries, and maximize unit physical readiness.

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