
The buttocks are largely shaped by the underlying gluteal muscles, fat distribution, and skin elasticity. With age, muscle mass naturally declines and collagen production slows, which can lead to loss of firmness, flattening, or sagging in the area. Weight fluctuations, pregnancy, hormonal changes, and a sedentary lifestyle can further contribute to changes in shape and tone.
In addition, gravity and reduced skin elasticity may cause the buttocks to appear less lifted or less defined over time. For many people, these changes impact body confidence, especially when wearing fitted clothing or swimwear, even if overall health and fitness are maintained.