Slow twitch muscle fibers are smaller, more packed with mitochondria, better at burning fat as fuel, and contract at lower velocity compared to fast twitch fibers.

“slow has this negative connotation but it's a quite healthy like fiber type to have”

“slow twitch f are fatigue resistant which means these are the ones that they can contract kind of all day long because they don't use as much glucose so they do use quite a bit still they are much better at using fat as a fuel they are uh they tend to have more and larger mitochondria and the downside is they don't contract with as much velocity in general”

“so the the slow twitch fiber the type one fiber is the red fiber it's the fiber that is uh dense in mitochondria it is the one that has the capacity for oxidative phosphorilation it is less powerful but much slower to fatigue”

“So, at lower intensities, you have these type one or slow twitch muscle fibers. And again, I think the term slow twitch, it's um uh it it it it does to some extent reflect the speed with which they twitch. But I think a more important way to think about them is they're slow to fatigue. Um, and they're more endurance-based fibers. So again, at lower intensities, they're the ones that are doing all the work. Very rich in mitochondria, deep red. Uh, they excel at oxidizing fat. Um, and they're very, very efficient.”