У вашего броузера проблема в совместимости с HTML5
More Functional Strength Training: https://www.weckmethod.com/services/functional-strength-training-mobility-training-rmt-club-workshop
Strengthening the feet by using cylindrical objects (such as a PVC pipe from your local hardware store) can help you create a stronger Base of Support. Stronger feet means a more stable BOS capable of expressing your body's full potential while eliminating overcompensation that occurs when the feet are weak.
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