How to pronounce 後腳 in Cantonese (6 out of 7):

重心前移 後腳屈曲
Focus forward, and the back of the leg bends.

Cantonese Sentence Breakdown

重心 cung4 sam1
center of gravity
cin4
front
forward
ahead
first
top (followed by a number)
future
ago
before
BC (e.g. 前293年)
former
formerly
advance
yi4
move
後腳 hau6 goek3
noun; the rear foot, normally, it describes one person after another one; (immediately) after
屈曲 wat1 kuk1
bend