balancier d’extension
/balɑ̃sjˈe dɛkstɑ̃sjˈɔ̃/
n
English: leg extension bar · 腿屈伸杆
Sens：Lying on the back with the legs under the bar, the user lifts the legs to the horizontal position, using the front thigh muscles.
English: leg extension bar · 腿屈伸杆