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

来源: 于 2014-04-10 10:57:28 [旧帖] [给我悄悄话] 本文已被阅读：次

Great! Warm-up few minutes FIRST before you start it, and Google- how to take care knees (avoid injuries) and lower-back (avoid pain).