Buns, commonly referred to as the buttocks, are the rounded portions of the human body located at the back, just below the lower back. They are primarily composed of muscle and fat, specifically the gluteus maximus, gluteus medius, and gluteus minimus muscles. These muscles play a crucial role in various movements, including walking, running, and climbing. The shape and size of buns can vary significantly among individuals due to factors such as genetics, body composition, and physical activity. Regular exercise, particularly strength training and aerobic activities, can help tone and strengthen the muscles in this area, contributing to overall fitness and posture.