The Science of Running - Is There a Zone?

There's no zones. Like we like zones, but zones are just a classification system. And anyone who's done lactate testing can tell that because it's kind of all over the place. A muscle tissue can be a hybrid of type one and type two A at the same time. We run hills as a quote unquote speed thing, but it's a way to save weak hamstrings or actually neglect them Because they're not as recruited as heavily when you're going uphill.