I am an 89yr old athlete, ex World Master triathlon
Continue the same physical activity
Hello dear, welcome to 'Ask A Doctor' service.
I read your query and here is my advice.
Since all heart examinations are normal you can continue to the same physical activity as usual. Rib osteoarthritis is not an indication to reduce physical activity just adopt activity to pain.
You also can use antinflamatory drugs such advil or aspirin for inflammation and pain.
Hope I have answered the question.
Let me know if I can assist you further.