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  • [♪ INTRO]

  • There's a good chance you're familiar with something called motor learning — a.k.a.

  • motor memoryor, more commonlymuscle memory.”

  • This is the thing that allows someone to ride a bike after many years away from the pedals,

  • or tie their shoes after wearing sandals all summer.

  • But while it's super cool and convenient and good, the names for this phenomenon can

  • also be a little misleading.

  • Because like, let's be real: Muscles don't store memories.

  • They're muscles, not brains.

  • Excepthere's the weird part: Muscles can remember some things!

  • Just not in the way you'd think.

  • This phenomenon has to do with muscle strength.

  • Basically, if you work out, your muscles will kind ofrememberwhat it's like to

  • be strong.

  • So even if you take some time off from the gym, you'll be able to bulk up faster when

  • you return than if you had never started exercising.

  • It sounds like it should be a fake life hack, but it's legit!

  • And it happens because of how muscles grow.

  • Whenever you increase the demand on your muscleslike by weight lifting, jogging, or or

  • suddenly having to carry a 2 year old around all the timeyou cause small tears in

  • the tissue.

  • These microtraumas release molecules that signal nearby satellite cells to swoop in

  • and repair the damage.

  • And during the repair, your muscle cells get thicker and stronger as new muscle fibers

  • grow.

  • To help with all of this, some of the satellite cells even donate their nuclei to your muscle

  • tissue.

  • And that is a big deal.

  • Nuclei in muscle cells are called myonuclei, and they're responsible for telling your

  • cells to make proteins.

  • So the more myonuclei you have, the faster you can create the protein you need to get

  • stronger.

  • This is awesome when you're training, but here's the best part: These nuclei stick

  • around in your cells even when you lose muscle mass.

  • So even if you take a break from exercising for a while, you'll be able to recover more

  • easily when you get back.

  • You'll get stronger faster than the newbie over on the next treadmill.

  • It's possible that these benefits last for a long time, too.

  • Studies in rats and insects have shown that, once muscle cells acquire myonuclei, they

  • persist even after significant amounts of muscle atrophy.

  • So if this is also true in humans, it could mean that being fit earlier in life would

  • carry over into old age.

  • It would be easier for you to get stronger even during a time where muscle atrophy is

  • common.

  • And since muscle strength impacts things like bone health, that could have a huge impact

  • on your quality of life.

  • So knowing this, I expect to see, out by the river in Missoula, Montana, just lots of SciShow

  • employees and SciShow audience just lifting rocks, and puttin em down and lifting em again.

  • It's time!

  • For us to be Rock Lifters!

  • Thanks for watching this episode of SciShow!

  • If you want to learn more about how motor memory works, and why riding a bike is just

  • likewell, riding a bikeyou can check out our episode over on SciShow Psych.

  • Did you know we have a psychology channel?

  • Go subscribe to that!

  • [♪ OUTRO]


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B1 muscle stronger lifting motor scishow exercising

Your Muscles Do Remember... But Not The Way You Think

  • 2 0
    林宜悉 posted on 2020/03/30
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