John Conway Body Mechanics Part Two
1:52
Added: 3 years ago
From: jenstlc
Views: 3,539
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  • Use of improper terminology (flex the back? how about hyperextending the back)

    naenae59 9 months ago

  • I think it would be beneficial to feature many more videos such as this one on YouTube. I always appreciate a quick reminder.

    Thank you.

    rainewater85 2 years ago

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