The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Fast-twitch fibers, unless you're doing something of high force or going, not be used. And they're not going to be kept around. And that's a problem because when you look at things like the need for leg strength through aging, the ability to catch yourself from a fall, these things are incredibly important.
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so the fact that you kind of have a genetic predisposition to have more of them is a good thing good
one of the Hallmarks of Aging is actually atrophy shrinkage of these fast- twitch muscle fibers shrinkage in Norway definitely different type different type but yes yes yes so as we older these slow twitch muscle fibers are shrinking in everybody and that's why people are losing strength and power and explosiveness most rapidly as they age much more than they're losing endurance slow fiber right
The most important thing I can do for you in the gym is not focus on the things that you're going to get for free it's focus on the things that are declining so rapidly and and I will as a corollary to that get a bunch of that other stuff for free but I have to focus on the atrophy of your fast twitch muscle fibers because it's already happening and we need to save that off and we need to put in the gym systems to support the reversal of that process
what we're after here is anytime I'm thinking longevity I'm thinking primarily absolute force and power um has to be preserved and that's this is a fast fiber atrophy issue
you have got to maintain fast twitch fiber sies
the most important thing I can do for you in the gym is not focus on the things that you're going to get for free it's focus on the things that are declining so rapidly
which is probably why, especially as we age, strength training is important in order to maintain the viability of these fast twitch muscle fibers.
certainly maintaining fast twitch muscle fibers through strength training is gonna be important in order to help prevent falls and other risks.