A sprinter driving powerfully off the starting block requires rapid, forceful hip extension. Which force-couple most efficiently generates this movement at the hip?

A sprinter driving powerfully off the

Multiple choice — select the best answer

AAdductor magnus and gracilis acting together
BRectus femoris and iliacus acting together
CGluteus maximus and hamstrings acting together
DGluteus medius and tensor fasciae latae acting together

✓ Correct answer: C. Gluteus maximus and hamstrings acting together The gluteus maximus is the prime mover for powerful hip extension, and the hamstrings (biceps femoris, semimembranosus, semitendinosus) act as strong synergists; together they form the primary force-couple driving explosive hip extension during sprinting.

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A sprinter driving powerfully off the starting block requires rapid, forceful hip extension. Which force-couple most efficiently generates this movement at the hip?

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