It's time you found out how to do a plank jack, the muscles it works, and how you can fit it into your workouts for better core strength and. Engage your abs to help protect your lower back from injury. Jump both feet out wide to each side as if you were doing a horizontal jumping jack. Stay in plank position as you quickly jump your feet back together. Continue to jump back in and out. - Take your jumping jacks to the floor for this plank variation that The 25 Best Exercises to Tone Your Abs (and None of Them Are Crunches). · Plank Jacks amp up your upper-body and lower-body muscles. At different motions, a variety of muscle groups is activated. They include your biceps, forearms, abs, glutes, and more. Upper Body. When you jump and get your legs off the ground, your arm muscles are engaged more. They include the biceps, triceps, forearms, pecs, and front deltoids. These muscles help you to keep the . 5 hours ago · It involves holding a plank while jumping your legs in and out, mimicking the motion of a jumping jack. And after only a few seconds, you're almost Missing: abs. · While in the plank position, slowly move your right leg out to the side by a couple of inches and, as the name suggests, tap your toes lightly on the floor. Pull your leg back to the starting position and then repeat on the other side. Continue for 20 seconds, rest for a .
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