Does your back hurt while you plank? Learn three of the most common causes why it's hurting and some steps you can take to correct it! From the doctor of physical therapy at Tone-and-Tighten.com
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INTENSE 7-MINUTE DYNAMIC PLANK WORKOUT: [ Ссылка ]
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Get a FREE 7-day workout and healthy recipe plan delivered straight to your inbox! Go to this link to get yours today: [ Ссылка ]
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