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In our second Basics episode, we talk about how oxygen travels from the air around us to our working muscles, covering everything from the lungs, blood, and heart, to how our working muscles grab that oxygen.

Gear up for a new Fast Talk Podcast series. First up: what are muscle fibers, what do we mean by slow-twitch and fast-twitch, and what are type IIa fibers? Our hosts cover everything you need to know about these all-important fibers.