Mountain climbers

Step 1
Starting Position: Come to a hands and knees position on the floor with your toes pointed toward the floor. Your hands should be slightly ahead of your shoulders and your fingers pointing forward. Bring your left foot forward and place it on the floor under your chest. Your knee and hip are bent and your thigh is in toward your chest. Lift your right knee off the ground, making your right leg straight and strong. Your right toes are tucked under, heel up. Brace your abdominal muscles to stabilize your spine. Pull your shoulder blades down and back. ⠀⠀⠀
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Step 2
Keeping your hands firmly on the ground, your abdominals engaged and shoulders strong, jump to switch leg positions. Both feet leave the ground as your drive your right knee forward and reach your left leg back. Now your left leg is fully extended behind you and your right knee and hip are bent with your right foot on the floor. ⠀⠀⠀
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Step 3
Exercise Variation: If you have limited range of motion in the hips, place hands on a step or platform.

Keep your weight evenly distributed on both legs. Do not shift all your weight forward into your front foot.