6. 3B: Dumbbell Weighted Deadbugs Lying on your back, have your arms straight up over your chest with weights in both hands. Bring your legs up to bend at 90 degrees with knees over the hips while pressing your lower back into the floor and holding the belly strong. Extend one leg out straight until your heel lightly taps the ground, then return to the starting position. Repeat on the opposite leg. Complete 8-12 reps per leg, then repeat exercises 3A and 3B for two to four sets to complete the superset. Tip: If you are really looking to challenge yourself, you can hold a crunch position while holding the weights up over head, the whole time. Image Source: Courtesy of Morit Summers NEXT GALLERY 10 No-Squat Workouts That Can Help Strengthen Your Legs Without Hurting Your Knees by Sydni Ellis