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

來源: 於 2014-04-10 10:57:28 [舊帖] [給我悄悄話] 本文已被閱讀：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).