Slide show: Back exercises in 15 minutes a day
Photos of man practicing lower back flexibility exercise
Previous Next 4 of 8 Lower back flexibility exercise

Lie on your back with your knees bent and your feet flat on the floor (A). Tighten your abdominal muscles so your stomach pulls away from your waistband (B). Hold for five seconds and then relax. Flatten your back, pulling your bellybutton toward the floor (C). Hold for five seconds and then relax. Repeat. Start with five repetitions each day and gradually work up to 30.

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