How to PLANK JACKS Properly: Correct Form, Mistakes, and Variations - A Step-By-Step Guide

1. Begin in a plank position, with your shoulder over your wrists, your body in one straight line and your feet together.

2. Like the motion of a jumping jack, jump your legs wide and then back together. 3. Repeat the movement for set number of reps.

Rep Count: Each plank jack count as 1 rep.

Modification: Straight Arm Plank (Watch video for modification)