A Marine does push-ups during Headquarters and Support Battalion’s monthly physical training aboard Marine Corps Base Camp Lejeune Aug. 3. The Marine is sweating profusely after more than an hour of vigorous Semper Fit exercises. The usual three-mile battalion run was swapped for Semper Fit in order to push the Marines to different mental limits. - A Marine does push-ups during Headquarters and Support Battalion’s monthly physical training aboard Marine Corps Base Camp Lejeune Aug. 3. The Marine is sweating profusely after more than an hour of vigorous Semper Fit exercises. The usual three-mile battalion run was swapped for Semper Fit in order to push the Marines to different mental limits.