I had open heart surgery 10 weeks ago, and recovery seems to be going well except for being out of breath. Nominal exertion results in shortness of breath, and it doesn't seem to be getting any better. I walk two miles a day, and breath hard most of the time. Previous to surgery I walked 5 to 10 miles a day (plus worked out on weight machines) and rarely experienced being out or even short of breath. Specifically I'm looking for a way to regain my breath, for example, are there breathing exercises that might help? Or generally speaking, is there anything I should or shouldn't be doing for proper recovery? I am a 78 year old white male.
I didn't find the right solution from the Internet.