Also, it's best not to smoke before exercise, because harmful substances in smoke will stay in your lungs for a while. If you exercise at this time, harmful substances will still be absorbed quickly by your body.

Smoking immediately after exercise is also harmful to your health. If you smoke immediately after exercise, there will be a lot of smoke mixed into the lungs, which will reduce the amount of oxygen we need to deliver, leading to chest tightness, shortness of breath, dizziness and fatigue. At this time, smoking is more harmful than usual.