The Eternal Beach-Body Plan
Phase II - Week 5: Workout III
Exercise X: Plank
Sets: 2 Reps: Hold for 90 Seconds Rest: 30 Seconds
Get into pushup position and then bend your elbows 90 degrees and rest your weight on your forearms. Keeping your entire body in a straight line, hold the position for time. That's one set.
The Eternal Beach-Body Plan: Phase II was shot at Gold's Gym, Manhattan—Wall Street