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muscle fibers

08

Mar'19

The Impact of Training on Muscle Fiber Types

We recently received a great question about muscle fiber types from an individual taking the HITuni personal trainer course. The student was concerned that when an individual partakes in HIT, there may be conversion of IIx fibers to IIa fibers. He pondered that if this does happen, then it might be a negative for aging muscle, as it would speed up the loss of the fastest-twitch fibers. He asked if I thought this was problematic. This is a valuable question and gives a springboard to dive into the fascinating subject of fiber types from a slightly different perspective than my …

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