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I appreciate being able to go faster for longer muscle-wise now, but my lungs can't keep up. I think that's why I keep hitting my oxygen wall. #cycling #bicycle #mastobikes #biketooter
in reply to Neil E. Hodges

For any effort longer than a sprint, you’re limited by your ability to deliver oxygen through your bloodstream in order to convert stored energy to usable energy. Power isn’t about muscles, it’s about oxygen delivery.
in reply to adamrice

That must be why folks pick a pace for sustained riding rather than go all out.
in reply to Neil E. Hodges

Sort of. There’s a hyperbolic curve that relates the duration of the effort to power output. Structured training, metabolic pathways and the like are a deep rabbit hole.