Great! Warm-up few minutes FIRST before you start it, and Google

来源: Stream123 2014-04-10 10:57:28 [] [旧帖] [给我悄悄话] 本文已被阅读: 次 (139 bytes)
Great! Warm-up few minutes FIRST before you start it, and Google- how to take care knees (avoid injuries) and lower-back (avoid pain).
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