Age plays a significant role in muscle mass development, with most individuals experiencing a gradual decline in muscle mass after the age of 30. This reduction, known as sarcopenia, affects overall strength, balance, and metabolism. Hormonal changes, a decrease in physical activity, and a decline in protein synthesis contribute to this phenomenon. Regular strength training can help mitigate muscle loss, promoting both muscle maintenance and growth at any age. Staying active and maintaining a balanced diet with adequate protein is essential for minimizing the effects of aging on muscle mass.