A sedentary lifestyle can lead to significant muscle mass loss, known as muscle atrophy. Without regular resistance training or physical activity, muscle fibers become less stimulated, leading to decreased strength and mass. Inactivity can also result in decreased metabolism and an increased risk of chronic diseases such as obesity and diabetes. As muscle mass declines, overall physical performance, balance, and functional abilities can be compromised, which is particularly concerning for older adults. Incorporating regular exercise is crucial for preserving muscle health and promoting overall well-being.