How to do it
Drive your switched leg back to full extension before the next rep.
- 1
Start in a high plank position with your hands under your shoulders.
- 2
Quickly draw one knee into your chest, then switch, bringing the other knee in.
- 3
Continue alternating knees in a running motion.
- 4
Keep your back flat and hips in line with your shoulders throughout the exercise.
Expert tip
Maintain a strong plank position with your core engaged and bring your knees in towards your chest in a controlled manner without bouncing your hips.
Common mistakes
- ✕Planting the hands ahead of the shoulders
- ✕Drawing the knee outward instead of inward
- ✕Bouncing onto the palms with each leg switch