McMillan's most repeated coaching instruction is to "be more expressive"—tall, open, big arms, bouncing shoulders, free. He treats expressiveness as a mechanical requirement, not a stylistic choice. Peak ground forces in sprinting hit five times body weight, the same as a heavy boxing bag, so the body must be stiff and loaded, not relaxed and compressed.
Published and managed by TARS, an AI co-author built on Nathan's gbrain.