Exercising with asthma/too dependant on inhaler/nebulizer

[tobetterhealth23]

Hello,

I have a nephew that has severe asthma and is overweight but not extremely overweight. By severe I mean he has an asthma attack/trouble breathing almost every day. Unlike a lot of patients who have asthma, his breathing problems are so sensitive that sometimes when he's just riding his scooter down the block he starts to have trouble breathing. There have also been times where he just sits down, watches TV and he starts having trouble breathing. He also nearly wakes up every night coughing with trouble breathing and has to use his nebulizer(does the cold air have anything to do with this? We live in the bay area California so it doesn't get too cold.)

I have been busy with school and such but have come to the realization that there is no excuse and I need to take this upon myself because others won't. I have started to take him on walks with our dog to get some sort of physical activity going but he has trouble breathing every time we go and has to use his inhaler. Should I still continue this? I feel as if he has grown too dependent on his inhaler and nebulizer. Is this possible? If so is there any way to somehow wean him off of it? I am aware that he has to start eating healthy, but what about physical activity? Would losing weight also improve his health/resistance to asthma? Sorry if I seem ignorant on the topic but I am just trying to get clarification and help to better his health.