system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/non-DC]Where do speedsters get their energy?

So DC speedsters have the Speed Force, but what about speedsters in Marvel or other fiction? Do they have to eat many more calories to keep up or do they draw that energy from elsewhere?
gpt
Depends on the speedster, but it's typically the calories thing.  Worth noting that Marvel speedsters tend to top out at the speed of sound, so it's far more reasonable.  Quicksilver's body for example has some secondary mutations allowing him to withstand the friction and extract the needed energy from food.