A sedentary lifestyle adversely impacts health by increasing the risk of various diseases, including obesity, type 2 diabetes, and cardiovascular diseases. Lack of physical activity can lead to weakened muscles, reduced bone density, and poorer mental health. Sedentariness contributes to weight gain and metabolic disruptions, affecting overall well-being. Incorporating regular movement and exercise into daily routines is essential for maintaining health, enhancing energy levels, and improving longevity.