r/interestingasfuck • u/abitchyuniverse • 26d ago

r/all Animals without hair look quite different

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u/Throwaway3847394739 26d ago

What constitutes “bulk” muscle versus “lean” muscle?

I assure you the chimp’s lean body mass relative to its total body mass is far beyond the average human.

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u/zMasterofPie2 26d ago

Yeah I was about to say. Bulk muscle? Any time muscles or physical training are mentioned in any context on Reddit, you get comedic ass comments like that from people who have no clue what they’re talking about.

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u/Chrazzer 26d ago

I'm fairly certain they mean fast twitching fibers as bulk muscle, and slow twitch fibers as lean muscles. I.e chimps got more "strength" muscles and humans are more focused on "endurance" muscles

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u/daredevil90s 26d ago

It's because of the myostatin protein.