I do not know why I'm posting this. My adult daughter was just here and we discussed my daily morning walk. I walk 3/4 mile most mornings
and I've done this since 2003.
I weighed 195 pounds and I had a midnight ride to the emergency room in an ambulance suffering from a heart attack.
While recuperating, I read a book on fitness walking. I weight 175 pounds now, walk 3/4 mile each morning, have no shortness of breath.
If any of you have shortness of breath, please google "fitness walking" and take it to heart.