Final answer:
Activating hip abductors is associated with the mobility of the adductors, which are the muscles that pull the legs toward the midline of the body.
Step-by-step explanation:
Activating the hip abductors does not increase the mobility of the quadriceps, hamstrings, or hip flexors directly but is associated with the mobility of the adductors. The adductors are the muscle group responsible for pulling the legs toward the midline of the body, and they are activated in movements that allow you to cross your legs. In contrast, the hip abductors, such as the gluteus medius and gluteus minimus, function to move the leg away from the body. These muscles also provide stability to the hip joint during activities such as walking and standing on one leg. Therefore, the regular activation and strengthening of hip abductors can help balance the muscles in the hip area, potentially leading to improved overall hip mobility, which may indirectly affect the adductor muscle group.