Final answer:
During the running stance phase, the gluteus maximus is significantly activated to extend the hip and propel the runner forward, also aiding in stabilization.
Step-by-step explanation:
During the stance phase of running, from right heel strike to right toe off, the muscle activation of the gluteus maximus (hip extensor) would be significant. As one of the gluteal muscles that originate on the pelvic girdle and insert on the femur, the gluteus maximus is the largest and is critical for movement and stabilization. This muscle is responsible for extending the hip, propelling the runner forward and supporting the body’s weight. Effective contraction of the gluteus maximus during the stance phase is essential for optimized running biomechanics and to maintain a stable pelvis and sagittal plane motion.
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