4 ms·

Look up fast twitch vs slow twitch muscles.

• rc_hadoken 7y ago
  My understanding is you can't "get" one or the other. You either have them or you dont. Keep in mind I last read on this in 2012.
  • deleted 7y ago
    [deleted]
  • Grustaf 7y ago
    Everyone has both, though I'm not sure you can change the proportions.
    • masonic 7y ago
      Humans don't experience hyperplasia. You can't gain fibers.