The HOS - E102 Standing abductor mainly targets the gluteal muscle groups, especially the gluteus maximus. During hip thrusts, the gluteus maximus contracts strongly, effectively enhancing its strength and size and shaping a more shapely buttock. Meanwhile, the hamstrings on the back of the thighs also contribute to the movement, helping to improve their strength and flexibility. In addition, the core muscle groups (including abdominal and lumbar muscles) continuously exert force to maintain body stability, thus enhancing core stability and strength.