Dust, heat and a burst of black‑and‑white stripes fill the savanna as a lion accelerates and a zebra answers with its own high‑intensity sprint. What looks like panic is actually a repeatable physiological routine, closer to a structured interval workout than a one‑off dash for life.Zebras carry a hybrid engine in their limbs. Their leg muscles pack both fast‑twitch glycolytic fibers for explosive...More