I was thinking about this last night. Being reptiles it seems they would be cold-blooded. But being huge, maybe they had body heat. Here's the most recent scientific thought on this matter. As usual don't expect anything decisive.
https://www.google.com/search?q=did+dino...1vOto,st:0
I don't know whether reptiles can move fast even when they're cold. They might not like doing it but that doesn't mean they can't. Does anyone have any experience of cold reptiles? Not necessarily through poking them on a cold day but 'things happen'. I can say hamsters don't normally land on their feet not as a result of chucking hamsters up in the air but because of the things that happen when one or both parties aren't paying attention. I'm fairly sure I've seen a frog swimming in a pond with a thin layer of ice on top. So UK frogs (reptiles?) can swim in water at close to freezing point. Or I imagined it. As it would be the one and only imaginary frog in my life I'm 86% sure it was real.