What Actions Are Primarily Responsible for the Final Push Off

Multiple Choice

What actions are primarily responsible for the final push off in the support phase in walking?

A) flexion of the knee and plantar flexion of the ankle
B) slight plantar flexion of the ankle and flexion of the metatarsal-phalangeal joints
C) forceful extension of the hip, knee, and ankle joints
D) strong extension of the hip and knee joints