Smoking has severe consequences on physical fitness levels, significantly impairing lung function and cardiovascular capacity. It can reduce aerobic endurance, making physical activity more challenging and less enjoyable. Additionally, smoking increases the risk of chronic diseases, such as heart disease and lung cancer, which can further hinder fitness abilities. The toxins in cigarette smoke also negatively affect muscle recovery and performance. Quitting smoking can lead to substantial improvements in overall health and physical performance, making it easier to engage in a more active lifestyle.