Question

Explain why people who smoke find it difficult to exercise.

Answer 1

Smoking, makes your lungs black, and they make you very sick, an if you smoke, stop!, because you are ruining  your health.
Hope that this helps you! =)

Answer 2

Smoking ruins your lungs making it harder to breath and get oxygen
you need oxygen when you exercise so you don't faint
smokers get less so it is harder for them, its like trying to exercise while breathing through a sponge or a straw os