7. Mountain climbers
If you’re having difficulty, try elevating your hands on a small bench or step. Your goal is 3 sets and each set includes 30-second mountain climbers with 30-second rest.
STEPS:
1. Assume a push-up position with your body in a straight line.
2. Raise your right knee toward your chest.
3. Return to the starting position and repeat with your left leg to complete one rep.