An alternative to sit-ups, this exercise strengthens the muscles that support your spine while giving you rock-hard abs. Lie on your stomach with your elbows on the floor in front of you, then slowly rise up onto your toes and straighten your body like a plank. Hold for ten to 20 counts, then lower yourself back down. Daily dose: One or two sets of ten.
If you've been looking for a workout that only takes 15 minutes of your time, keep reading: physiologist Mike Bracko from the American College of Sports medicine has the perfect routine for you.
Try these new exercises from Adam Campbell of Women's Health to avoid plateaus, beat boredom and speed fat loss.
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