http://www.12minuteathlete.com
Stand with your feet about hip-width apart, chest proud, and shoulders pulled back.
Engage your core as you lower into a deep squat.
Return to standing while simultaneously raising one knee toward your elbow on your same side.
Lower into a squat and repeat on the opposite side.
Each squat with knee shield is one rep.
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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.