The plank jack is "great for focusing on total body strength," said WITS-certified personal trainer and CrossFit Level One coach Ashley Rademacher, "but it's primarily focused on engaging the shoulder, core and glutes." The jumping motion will get your heart rate up as well. "The faster you move, the more challenging it is!"
- Begin in plank position, with your shoulders over your wrists, your body in one straight line, and your feet together.
- Like the motion of a jumping jack, jump your legs wide and then back together. Jump as quickly as you want, but keep your pelvis steady and don't let your booty rise toward the ceiling.
- This completes one rep.
- To modify, step out one foot at a time, then step them back in.