Скачать или смотреть NAVY FITNESS - Plank - Running

Starting Position:
Start in a push up position with your hands directly beneath your shoulders and your feet shoulder width apart. Keeping your hips and torso still, draw one knee towards your chest keeping your back leg straight.
Procedure:
With your torso engaged, switch your leg position by driving your straightened knee towards your chest while straightening your bent knee. Continue alternating this movement for the prescribed repetitions.
Coaching Key:
Keep your back flat and torso engaged throughout the entire movement. Try to keep your hips still as you alternate leg positions, do not bounce.
You Should Feel It:
In your torso, hips, and shoulder