Side Bridge Crucial for Low Back stability and can benefit everyone. Couple of key factors are 1. Lie on side, elbow and hand on the ground. Knees together to start, then top foot plants in front of bottom in the middle of the lower leg. 2. Lift your bottom hip off the floor. This will automatically engage the oblique muscles in your core. Be sure you are breathing. 3. be sure to have smooth controlled movements. Always think quality over quantity. Only need to do one set 5 -10 second holds and 5 to 10 repetitions. Also, best to do before a workout, rather than at the end.