I recently bought a walking pad so I can still get some exercise in during those cold and wet Melbourne days (Yes, we're nearly at summer but it still feels like our winter).

I was running on it for a bit and must have been puffing quite a lot, because Clydey came over and was meowing and jumping around in a very concerned way. The timer ran out and I finished by sitting down on my chair. Clydey sat down next to me and flopped to the floor. All that exercise wore him out.

Side note, having a 6kg cat climb up to your shoulders and sit down adds an extra challenge when walking at 6km/h.