My art teacher pointed out that humans are essentially running machines, especially with our ability to sweat. He then proceeded to tell us about ultra marathons, which can span from around 50-150 miles. He pointed out the "world's toughest foot race" the Badwater Ultramarathon. It runs through Death Valley in mid July. 135 miles. The cumulative elevation is 13,000 feet. It's so hot people try to run on the paint lines in the middle of the road so their shoes don't melt. How would aliens react?
Probably the same way I, a very human person, react: