The HOS - E110 Kneeling hip pendulum mainly targets the muscle groups around the hips. During the kneeling hip - swinging process, gluteal muscles such as the gluteus maximus and gluteus medius actively exert force. This helps to enhance the strength of the gluteal muscles and shape better - looking buttocks. Meanwhile, the hip adductors and abductors are also exercised during the swinging motion, improving the stability and flexibility of the hips.