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Lie on your back, engage your core and reach your hands towards your feet.
Keeping your core tight, tuck your knees in towards your chest.
Straighten your legs as you reach your hands above your head, keeping a hollow body position.
Raise your arms and legs towards each other, keeping them as straight as possible and aiming to touch your feet with your hands.
Lower down and repeat the sequence.
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Krista Stryker is an NSCA certified personal trainer and the founder of 12 Minute Athlete, a popular website and app helping thousands of people get fit in as little time as possible. A HIIT workout regimen consisting of incredibly short, effective workouts based on calisthenics, cross-training and functional fitness, 12 Minute Athlete helps athletes of all level get in the best shape of their lives with minimal equipment and no gym membership.
