Excessive screen time can negatively impact physical health by contributing to a sedentary lifestyle, which is linked to various health problems, including obesity and heart disease. Long hours of sitting while using screens can lead to poor posture, resulting in back and neck pain. Additionally, reduced physical activity can diminish muscle strength and cardiovascular fitness. Screen time can also interfere with sleep patterns, leading to fatigue and decreased energy levels. It's essential to balance screen use with regular movement and outdoor activities to maintain overall health and well-being.