Mountain climbers

Mountain climbers are an advanced, high intensity exercise that will get your heart rate up and add intensity to your workouts. This move will build leg endurance and help you work on agility as well, making it a great overall exercise.

If you've never tried this move, take your time and ease into it with slow reps. If you feel discomfort or pain, avoid this exercise. You'll need lots of core strength for this move, as well as upper body endurance.

1. Begin in a push-up position on your hands and toes, back flat, and abs engaged.
2. Bring your right knee in towards the chest, resting the foot on the floor.
3. Jump up and switch feet in the air, bringing the left foot in and the right foot back.
4. Continue alternating the feet as fast as you safely can for 30 to 60 seconds.