T-Spine Open Book

Set up with a KB or other light weight in one hand. Lie on your side with hips and shoulders stacked, hips and knees bent at 90*, and the weight pressed up so your wrist is over your shoulder. Keeping your lower back and hips stationary, drop your top shoulder back toward the ground. Move through your mid-back and keep the weight stacked vertically over your top shoulder. If you feel this in your lower back, try bringing your knees up closer to your chest.