Lower Your entire body until eventually your rear knee just about touches the ground plus your front thigh is parallel to the floor. Then force from the heel within your entrance foot to return to standing, keeping the back foot within the bench. Repeat for essential reps then change legs. https://econopass.com/health-and-fitness/fitness-zone/fitness-effective-workouts/10-effective-exercises-building-lifelong-core-strength-without-planks/