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Take the starting position with your feet shoulder- width apart.
do a jumping jack and follow it up by squatting down. Inhale while going down and exhale while
coming up. Come back to the normal squat position to
complete a rep. Engage the core while doing the jumping jack.

Take the starting position with your feet shoulder- width apart.

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30天下蹲大挑戰--第11天（傑克蹲練習）。 (30 Days Squat Challenge - Day 11 (Jack Squat Exercise))

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