rear foot

the the the

rear foot：腳踵，或稱腳後跟。

例句：A player who comes to a stop on the count of two, with one foot in advance of the other, May pivot using only the rear foot as the pivot foot.
球員在完成兩步停下之後，在行進方向上居於後方的腳可以作為中軸腳進行轉動。