Yeah, I'm not American and haven't been to Arizona. But from my understanding it can and regularly gets hellishly hot there, no?

But there is something to what you say in that I can definitely spend more time outside on a mellow sunny day in Spain than on just about any day in Eastern Canada where I reside. But it's still not what I yearn for. I'm not a couch potato though as I'm a pretty hardcore freestyle swimmer. So it's not an issue of low energy due to lack of exercise.