A man approached me in the gym and started talking to me. How do I politely end the conversation without being rude?

I’ve had my gym membership for a month now. I go 3 to 4 times a week. A guy approached me when I was working out. He said I’ve seen you around a lot and thought I’d say “Hi!” We chatted. I didn’t really want to talk but didn’t want to be rude. I had to cut him off so I could focus on the equipment I was using. <br><br>I don’t want to be rude, but don’t want to waste time I could be using my gym time to get fitter.<br><br>Please any tips.