Here, we take a look at what the science behind what happens to your VO2 max, flexibility, muscle power, and recovery as you age.
max aren’t entirely driven by changes in the heart. If the heart is delivering as much oxygen as before, but VOWhat precisely is going on is a subject of considerable dispute. Partly, it’s simply that people lose muscle mass with age—smaller muscles use less oxygen.
Physiologists have long known that for any given movement, our nerves recruit only a fraction of each muscle’s fibers, letting the others rest. In, Noakes suggests that as we age, our nervous systems may become more cautious about protecting our muscles from overload. Part of the difficulty is the typical middle-aged lifestyle. McMillan notes that many masters-age runners spend a lot of their work lives sitting at their desks or in meetings. “We’ve risen to a level [in our jobs] that can be bad for us,” he says."We’re doing a lot of things that don’t have us moving. That’s the worst thing we can do from a flexibility standpoint.”
The solution is stretching. The idea is to get blood flowing through the connective tissues, best done by stretching them dynamically before the workout, and statically afterward.
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