Does a tired brain really slow an athlete’s body—or is mental fatigue just the latest performance myth? A massive new study, the largest of its kind, puts the question to the test, offering the strongest evidence yet that cognitive exhaustion subtly but meaningfully undermines physical performance, even as the scientific debate continues. Tap the link in our bio for the research. ✍️ : sweat_science #sweatscience #brain #tired #mentalfatigue #training #recovery