During midstance, knee flexors act eccentrically to control what?

During midstance, knee flexors act eccentrically to control what?

• A. Toe extension
• B. Hip abduction
• C. Knee extension
• D. Ankle inversion

Answer: (C)

During midstance the leg bears weight as the body moves forward, and the knee moves from a flexed position toward near full extension. The knee flexors (hamstrings) contract eccentrically, meaning they lengthen while contracting, to slow and control the rate of knee extension. This provides stability and helps absorb impact as the body passes over the foot, preventing the knee from extending too quickly or buckling. The other options don’t fit because toe extension, hip abduction, and ankle inversion involve different muscle actions and aren’t the primary control of the knee during this phase.

During midstance the leg bears weight as the body moves forward, and the knee moves from a flexed position toward near full extension. The knee flexors (hamstrings) contract eccentrically, meaning they lengthen while contracting, to slow and control the rate of knee extension. This provides stability and helps absorb impact as the body passes over the foot, preventing the knee from extending too quickly or buckling. The other options don’t fit because toe extension, hip abduction, and ankle inversion involve different muscle actions and aren’t the primary control of the knee during this phase.