Instead of “So you need to start going to the gym/So you need to spend more time outdoors” we want to aim for something like “What do you want to do with that?”
Examples:
“What do you think is getting in the way?”
“If you wanted to change that, how would you approach it?”
“Does that matter to you or not really?”
Now he’s not being told, he’s being positioned as the decision-maker. Just a thought so as NOT to trigger pushback from him.