Why is this page not more well known? These videos are ALWAYS so amazing, her way of explaining topics are concise, images/diagrams are always helpful. Man, do I wish I was a student at UChicago
This makes sense but can you increase one pr the other such as female /male body builders and is this at the expense of the others. Also how would this work with martial arts as there are soft styles and hard styles or do they just use fast twitch until the finish with speed momentum where the soft style would continue while the hard style would introduce slow twitch, got me fascinated now.
Differences in strength in activities like weight lifting have to do in part with the percentage of fiber types. Muscle fibers grow in their thickness, but not in their number. Considering the muscle fibers alone, "getting stronger" has to do with more fibers pulling at the same time, developing thicker myofilaments, having sufficient energy, etc. (There is some evidence that fast muscle fibers can in effect convert to type 1, but there's not enough to make scientific consensus. Most would say they can't convert, and you also can't produce more of a type of muscle fiber.) The nervous system, on the other hand, can get better at its job: faster, better at recruiting, and fires more pull-messages. The language of slow or fast referring to muscle fibers is a little misleading. "Fast fibers" often contract slowly, but they exert more force than slow twitch fibers would at the same speed of contraction. So hard styles and soft styles both use fast-twitch muscles if they're moving fast. Something like White Crane is very fast, though it's not a tense muscle being used. You focus a lot on relaxing antagonist muscles in soft styles. Tiger can also have very slow movements, but that doesn't mean it's using slow twitch/type 1 muscles. If you're maxing your bench press (or moving with heavy braceles), you're also moving slowly, exerting the maximal force of your strongest muscle fibers.
Why is this page not more well known? These videos are ALWAYS so amazing, her way of explaining topics are concise, images/diagrams are always helpful. Man, do I wish I was a student at UChicago
You are a fantastic teacher ! Tons of gratitude !
All the words are gems.. Clearly explained in a nutshell.
Thank you for these awesome videos dr Peggy
peggy i wish you were my teacher!!! thank you for these videos!
This makes sense but can you increase one pr the other such as female /male body builders and is this at the expense of the others. Also how would this work with martial arts as there are soft styles and hard styles or do they just use fast twitch until the finish with speed momentum where the soft style would continue while the hard style would introduce slow twitch, got me fascinated now.
Differences in strength in activities like weight lifting have to do in part with the percentage of fiber types.
Muscle fibers grow in their thickness, but not in their number. Considering the muscle fibers alone, "getting stronger" has to do with more fibers pulling at the same time, developing thicker myofilaments, having sufficient energy, etc.
(There is some evidence that fast muscle fibers can in effect convert to type 1, but there's not enough to make scientific consensus. Most would say they can't convert, and you also can't produce more of a type of muscle fiber.)
The nervous system, on the other hand, can get better at its job: faster, better at recruiting, and fires more pull-messages.
The language of slow or fast referring to muscle fibers is a little misleading. "Fast fibers" often contract slowly, but they exert more force than slow twitch fibers would at the same speed of contraction.
So hard styles and soft styles both use fast-twitch muscles if they're moving fast. Something like White Crane is very fast, though it's not a tense muscle being used. You focus a lot on relaxing antagonist muscles in soft styles. Tiger can also have very slow movements, but that doesn't mean it's using slow twitch/type 1 muscles. If you're maxing your bench press (or moving with heavy braceles), you're also moving slowly, exerting the maximal force of your strongest muscle fibers.