Maybe, my English is so poor that you can't understand my question.
Sorry about that.
What I want to know is that "getting healthier and stronger" suggests that Mike's fans take exercise and they don't get sick?
In the sentence, 'fans' means the same meaning as 'baseball fans' or 'fans of John Wayne'. Am I right?
If so, Mike (a singer, or an actor whatever) has a lot of fans, and they take exercise every day?
I don't get the situation.