We wrapped the workout with a group session of 48 burpees.

The 48 burpees were done in honor of the late SEAL Charles "Chuck Heavy" Keating IV, who was killed in action in Iraq last year — he carried a hefty Mark 48 machine gun.

My burpees came out more like a painful and ugly step-by-step yoga routine, but I saw the SEALs also had less-than-perfect form, so I got through them.