Final answer:
Flexing the hip enhances the force potential of the gluteus medius as a hip abductor.
Step-by-step explanation:
When considering which muscle's force potential as a hip abductor is enhanced by flexing the hip, it's important to understand the role and synergy of muscles involved in hip movements. The tensor fasciae latae assists in flexing and abducting the thigh, working in conjunction with the gluteus medius and the iliopsoas. However, specifically when the hip is flexed, the gluteus medius has an increased potential for force as a hip abductor, because this position stabilizes the pelvis, allowing the gluteus medius to act more effectively.
Flexing the hip allows for greater activation and force generation in this muscle, which is responsible for abduction of the thigh.