Strong, stable, healthy adductors are necessary for optimal hip extension, they help to keep the knees in line with the toes during squats (especially in the bottom of squats), and they can help to prevent groin strains. In fact, one study found that disproportionately weak adductors increased an athlete’s risk of injury by seventeen times.
Adductors are also crucial for rotational power, so athletes in sports that involve swinging (like golf and tennis) or throwing (like football and baseball) should not neglect adductors.
A sore or tight groin may be an indication of weak adductors.