ショーン・ブースのインスタグラム(shawn_booth18) - 2月27日 09時43分

Tag your workout partner and let them know you’re adding this move to your core workout this week??
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Secure a medicine ball between your knees. Keep your back and legs off the ground the entire exercise. With one knee bent, lift the lower leg up & down 20 times (while the other leg remains still). Do the same for the other leg. Then do both of your legs at the same time for 20 reps. I promise you it’s going to burn big time!
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The core will be working extra hard while you squeeze your legs together to prevent the ball from falling!
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Modified: Try without a medicine ball.
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?: @zachharrisonphotography
Gym: @igovigor ?: “Best Friend” by Sofi Tukker
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#ShawnBFIT #personaltrainer #workout #fitness #core #abs

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