A sedentary lifestyle can have severe long-term health effects, including increased risks of obesity, type 2 diabetes, and cardiovascular diseases. Prolonged inactivity leads to muscle atrophy, weakened bones, and a decline in overall metabolic health. It can also contribute to mental health issues such as depression and anxiety due to lack of endorphin release from physical activity. Therefore, incorporating regular physical activity is essential for mitigating these risks and promoting a healthier, more active lifestyle.