I was simplifying somewhat. They do like to sunbath especially in the morning though and from what I've read in their natural habitat in Greece as well (to adult tortoises there's few natural predators there, but younglings tend to stay hidden in their first few years).

My point was more that wild animals do not push themselves in the same way we humans do. There's fulfilling basic needs and stress from disease or predators, but no voluntary exercise beyond what's necessary for finding food/drink or obsession for self-improvement.

I'd be curious if one could teach some smarter animals that they're able to self-improve but that probably requires higher-order thinking...