Smoking has detrimental effects on both fitness and overall health. It compromises lung function and oxygen delivery, leading to reduced aerobic capacity and stamina. Active smokers typically experience increased fatigue and a diminished ability to recover after exercise. Furthermore, smoking is linked to numerous health risks, including heart disease and respiratory conditions, which further impair physical activity potential. The negative impact on circulation can also hinder muscle performance and repair, making it crucial for individuals to refrain from smoking to optimize their fitness levels and overall health.