What is the primary function of the gluteus maximus?

The primary function of the gluteus maximus is hip extension. This muscle is the largest and most superficial of the gluteal muscles and plays a crucial role in movements that involve extending the hip joint, such as standing up from a seated position, climbing stairs, and running. It also assists in maintaining an upright posture and supports various athletic activities that require power and strength in the lower body. The gluteus maximus contributes to stabilizing the hip and knee joints during these movements, making it essential for functional mobility and performance in sports and daily activities.