We're going to do an exercise that incorporates working the hamstrings, which attach into the low back, so we can work in integrity of the low back. It's a simple but yet very controlled movement. So come prone down on your belly. You can relax your forehead onto your fists or your palms, whichever gives you neutral cervical posture. Create support by pulling your navel into your spine, so you have active abs and you have active lower body. Try to just relax your shoulders and your neck and take one foot, flex at the heel, pull in, 2, 3, and extend. In, 2, 3, hold and release. We exhale and inhale, and we're focusing in on the hamstrings, primary mover, like I said, which attach into the low back, and release. Make sure you hit the other side, controlling all the momentum, and release. It doesn't really look like I'm doing much, but I can feel my hamstring's burning kick right in when I pulse the muscle. Contract, contract, and release. Do about 3 sets of 10, building up to on each side before you try the double leg kicks.