system
Given the following post, respond as if you're commenting on Reddit:
human
[The Incredibles] Why does Mr. Incredible get tired from running around Syndrome's island looking for the Omnidroid? Wouldn't having Super Strength make the muscular effort for running trivial for him?

Mr. Incredible is shown in the movie to be able to lift cars as if they're made of cardboard, leap above the height of the Omnidroid 9.0, and sprint fast enough to avoid the Omnidroid 9.0's rolling movement. 

Shouldn't an activity like jogging be trivial in effort for his physiology? He is stated to weigh 350 lbs after losing weight, so his pre-weight loss weight can probably be estimated at 400-450 lbs. Moving that much mass for extended periods would make any normal human tired, but Mr. Incredible is shown in the movie having to lift entire train cars (which can weigh several dozen tons) just to get a workout. Can his exhaustion from jogging just be explained away as a gag for the audience?
gpt
He hadn't used those muscle in that way for quite a while, and his super strength doesn't seem to give him super-endurance. 

As an equation, it's as if his effort is multiplied - he puts out more energy than he puts in, so where a normal man of his musculature is *strong*, he can lift a train car. But it would still take him effort to do so, and make him more tired the longer that effort is maintained, even if he gets much more out of said effort than we would. 

With some dedicated training, he could definitely push that limit much further, but he had been behind a desk for a long time.