LOG RUNNER with PUSH PRESS

Works core, chest, back, shoulders, biceps, triceps, forearms, glutes, hamstrings, quads, and calves. Get in plank position with your feet together, your arms extended about a foot in front of you, and your hands shoulder-width apart on a large, secure stump. Bend your right knee in toward your chest (A). That's one rep. Repeat with the left knee. Go as fast as possible--as if you were running in place--for 20 reps. Next, get into plank position with your hands under your shoulders (B) and do five pushups (C). Repeat the entire sequence.