From the Mayo Clinic
If you have a chronic disease — such as heart disease, diabetes, asthma, or back or joint pain — exercise can have important health benefits. However, it's crucial to talk to your doctor before starting an exercise routine. He or she might have advice on what exercises are safe and any precautions you might need to take while exercising.
How can exercise improve a chronic condition?
Regular exercise can help you manage symptoms and improve your health. For example: