Smoking has detrimental effects on overall fitness and sports performance. It impairs lung capacity and cardiovascular function, which are essential for endurance and stamina in physical activities. Smokers are at a higher risk for fatigue and reduced recovery rates, which can hinder athletic performance. Additionally, smoking increases the risk of injuries and can lead to chronic health issues like respiratory diseases. Overall, quitting smoking can dramatically enhance fitness levels, enabling individuals to engage more effectively in physical activities and improve overall health outcomes.