Hip flexors become eccentrically active before toe-off during which range?

Hip flexors become eccentrically active before toe-off during which range?

• A. 0-10%
• B. 10-20%
• C. 30-50%
• D. 70-90%

Answer: (C)

Before toe-off, the hip flexors work eccentrically to control hip extension as the body advances over the stance leg. This occurs in terminal stance, roughly 30–50% of the gait cycle, when the leg is still extending and the thigh is moving into a more extended position. The hip flexors lengthen under load to regulate that motion and set up the transition to swing. Toe-off happens later in the cycle, and as you move into pre-swing and early swing the hip flexors switch to concentric action to flex the hip for limb advancement. That’s why the 30–50% range is the correct window for eccentric activation before toe-off.

Before toe-off, the hip flexors work eccentrically to control hip extension as the body advances over the stance leg. This occurs in terminal stance, roughly 30–50% of the gait cycle, when the leg is still extending and the thigh is moving into a more extended position. The hip flexors lengthen under load to regulate that motion and set up the transition to swing. Toe-off happens later in the cycle, and as you move into pre-swing and early swing the hip flexors switch to concentric action to flex the hip for limb advancement. That’s why the 30–50% range is the correct window for eccentric activation before toe-off.