Dips activate multiple muscles. The main muscle groups worked with dips include: Triceps Anterior deltoid Pectoralis muscles (sternal, clavicular, and minor) Rhomboid muscles of the back These muscles are activated to a different degree depending on the posture during the exercise. Their versatility is mainly part of upper body workouts in bodybuilding. But the exercises can also be used by athletes who rely on upper body strength. Such athletes include swimmers and tennis players.