You can spin it as unhealthy, if you prefer.
As for 'only' three campaign stops a day; I don't blame him. Why tire yourself out when there is plenty of time?
You may be correct, but regardless if it is the MSM fault, or if Fred does just sweat more than his competitors, what is the perception? We can talk about how his image doesn't mean anything until we are blue in the face, if the general public thinks he is old and worn out, the truth doesn't mean a hill of beans!
Take off your Fred colored glasses for just a moment, and see what the rest of the world may see.