Yes, they should do exercise regulary.
The difference between exercise asthma and regular asthma is that exercise asthma arises due to too much exercise while regular asthma is not.
Exercise induced asthma is where you get asthma from exercese
I wouldn't recommend a lab for a child who has asthma only because labs shed a lot. I have a cousin who has bad asthma and he cannot be around my labrador. I would recommend a dog that won't shed such as a Bernese Mountain dog. They do not shed and the oils on their skin will not affect someone with asthma.
Unless the person has exercise-induced asthma, yoga would have no effect on asthma. If they do have exercise-induced asthma, it is possible that the yoga could actually trigger an attack.
Regular and moderate exercise strengthens the lungs and prevents asthma symptoms. Although exercise can be a trigger for asthma in some people, with appropriate asthma treatment and monitoring of the condition, exercise, even vigorous exercise, is possible. In fact, many world-class athletes have asthma. Consult with your doctor before starting an exercise program, and carry an asthma inhaler at all times
If you have other symptoms, such as wheezing and coughing, then you probably have exercise-induced asthma, which means that you have asthma like symptoms when you exercise.
One alternative name for asthma is bronchial asthma. Other names that are used include: allergy induced asthma and exercise induced asthma.
Swimming
Some people have exercise-induced asthma, which is asthma that happens when you are exercising. Asthma is when you start nwheezing and coughing, and you can't breathe. Most people who have asthma will get an asthma pump, a tool used to help you breathe better. If you exercise vigorously, you may run out of breath, and asthmatic people have the tendency to start wheezing and have an asthma attack.
You can't just randomly die from having asthma. There are many different kinds of asthma, so for example if you had exercise induced asthma, meaning that you have breathing problems when you exercise too hard, then you would have to exercise hard enough to have an asthma attack, which is where you have trouble breathing because of mucus taking over your airway. That person would then collapse, if someone called an ambulence and made them use their inhaler until the ambulence arrived, then the person would probably survive. If the person didn't have an inhaler around, or nobody saw them collapse, then they would probably die from lack of oxygen
No, you cannot contract asthma from someone else
Swimming, Surely is the best exercise for asthma. It will not completely cure the disease but will definitely reduce it. Because by doing swimming it will be a good breathing exercise.