- Main muscle
- Abdominals
- Also works
- Front Delt, Quadriceps
- Equipment
- None needed
How to do it
- Start at the top of a push-up with your body in a straight line.
- Drive one knee toward your chest.
- Switch legs quickly, like running in place, keeping your hips low.
Common mistakes
- Bouncing your hips up and down.
- Letting your shoulders drift behind your hands.
Know what to lift next
Iron Streak puts lifts like the Mountain Climbers into a weekly plan built around your goal, schedule and equipment. Every set shows the weight and reps to aim for, and your streak keeps score.