Smoking negatively impacts physical fitness levels, leading to reduced exercise capacity and poorer overall health. The harmful substances in tobacco damage lung function and circulation, limiting the amount of oxygen available for physical activity. Smokers often experience shortness of breath, decreased endurance, and slower recovery times, impairing performance in both aerobic and strength-based activities. Additionally, smoking can contribute to chronic health issues, such as heart disease, respiratory illnesses, and an increased risk of injuries. Quitting smoking can significantly improve fitness levels and overall well-being, fostering healthier lifestyles.