I like a little social interaction with my colleagues. I've spoken 1-1 for quite a while in order to get to know my colleagues at my new desk job.
There is a particular colleague who is obsessed with exercising. I talked to him about his hobbies and his interests. And now he won't stop talking about exercising. He chats with me from time to time. But I dread every time I see him coming because I know he's going to start talking about exercising.
The topic is interesting by itself. It's the way he talks about it. He talks about his own successes, how everyone else should exercise, how it's the right way to live. He's created his own course (free online) and he keeps ranting on and on about what his course teaches, how bad the other courses are, how everyone should learn from his course, how people have thanked him for making this course, and back to the kind of exercises he does and how he benefits from them. Initially this feels friendly. But after 40-45 minutes of listening to him day after day and especially it being a one-sided conversation it gets irritating.
When I talk about my own experiences (failures in exercising) he lacks any empathy or interest about my experience and insists that I must exercise the way he does it. Or he starts repeating things he's already spoken about or acts like he's trying to fix me. Before going into monologues once again.
Since I'm new at the company, I don't want to put him off directly. I've tried telling him that I'll try different forms of exercising and then we can chat in more details - for now, let's not. Also tried telling him that unfortunately, I don't feel like talking about exercising right now. In response he puts a long pause staring at me and then talks about it anyway, insisting that if I tried the same exercises that he does and the same way that he does then I would get into it.
The only time he stops the topic is when I agree to try exercising his way or if I acknowledge that he's taught me something important.
It's difficult to interrupt when he's talking about his experiences and it would be rude to interrupt him then. When I do try changing topics he brings it back to exercising anyway. Obviously, exercising is pretty important to him.
How do I get him to stop talking about it or change the topic?
Or more generally, how do I change topics when someone is quite passionately talking about something they like for an hour and I would like to change it to anything else?