5. Straight Leg Raise
From a faceup position on the floor, place hands under your low back and brace your core. Lift straight legs slowly off the ground, bringing them to 90-degrees, then slowly lower them back to the ground. If you have any pain in your lower back, do not do this move.
Pull-Up Bar Variation
If you’re prone to low back pain or have access to a pull-up bar, try this variation instead. Holding a pull-up bar, brace your core and lift your legs off the ground to hip height. Beginners can bend their knees, or you can keep your legs straight (hinging only a the hip) for more of a challenge. Slowly lower the legs to start position.
6. Cross Body Climber
From a high plank position with your body straight, hips level, and core braced, lift right leg and draw right knee toward left elbow. As you return right leg to plank, lift left leg and draw left knee toward right elbow. Continue to alternate.