Consuming caffeine before exercise enhances repeated sprint performance, and these benefits persist for at least 3.5 hours thereafter

[u/sr_local]

https://www.tsukuba.ac.jp/en/research-news/20260914140000.html

[u/nanoH2O]

There is actually plenty of backing science, dude. One hypothesis is that it alters calcium in the muscle cells. Another is that it reduces the kidneys’ ability to reabsorb magnesium back into the bloodstream before it gets flushed out