Exercise for BE/NTM patients

I am not a fun for exercise in my whole life. If I exercise in a high intensity way for two weeks, I will get a cold for sure.

I quit jogging after I got MAC, as I am not sure jogging is the best way to exercise with lung disease like BE/ active infection as it may cause bleeding.

However after I did 50 push ups on Monday , I found I have a little bit sputum with brown color, not sure whether it is a bleeding caused by push ups. Does anyone share the same experience ever? Does it mean I still have ongoing infection/ inflammation in my lungs? I thought I can exercise in a more intensive way when my cavity is closed, but it seems I should not be such optimistic.

Walking is great but it is not strength exercise. Swimming is impossible for BE patients too. It is important to control the amount/intensity, which is my lesson.