Use the bodyweight bridge exercise to strengthen and stabilize your lower back muscles. Many people develop low back problems because too little time is spent strengthening the muscles of the lower back.
1. Start by lying on your back with your knees bent and your hands by your sides.
2. Lift your body off the ground into a straight line and brace your torso (like taking a punch to the gut). Don't let your body sag. Hold for 3-5 seconds and repeat for 12-15 repetitions. Do 2-3 sets.