Morphology is genetic: Unfortunately, we don't get to choose the shape of our anatomy. While some store fat in their thighs, others accumulate it in their belly, as the location of fat cells is linked to genetic predisposition. Sometimes, fat helps to give skin a bounce! But if your buttocks are sagging, it might be something common in your family.
Lack of exercise: Often, flat buttocks are due to a lack of physical activity. To increase buttock volume and regain a firm backside, gym sessions are recommended.
Significant weight loss: Weight loss can lead to muscle loss. When the body experiences a caloric deficit, it draws on fat reserves, but also muscle, including the gluteal muscles. As a result, the buttocks tend to sag.
Aging: As we age, the skin loses elasticity due to a decrease in natural collagen and elastin reserves. Muscle loss is also observed with age, reaching up to 40% between ages 40 and 90 due to hormonal imbalance and poorer nutrient absorption.