back up and straddle 中文意思是什麼
back up and straddle
解釋
后擺上分腿擺越-
Straddle : bend at the knees and keep the back straight, then straighten up
扎馬:屈曲膝蓋成半蹲姿勢,再站直可以加強大腿肌肉
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