The surprising reason our muscles get tired - Christian Moro

Why do our muscles get tired and sore after exercise? Explore how our muscles function, and how you can exercise longer without experiencing muscle fatigue.
--
You're lifting weights. The first time feels easy, but each lift takes more and more effort until you can’t continue. Inside your arms, the muscles responsible for the lifting have become unable to contract. What’s going on? Christian Moro explains how exactly our muscles operate, and what causes them to become fatigued.
Lesson by Christian Moro, directed by Nichola Latzgo.
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[@rugvedk109]

These animations are really good. Even kids can understand them.

[@HadiLePanda]

I totally agree :) Hoping to see more of these

[@abc9591]

Same

[@squidlywizard3347]

kzbin.info/www/bejne/iJ64qaF3oLRja5Y

[@rugvedk109]

@Arshia Kiannasr yeah. That was unexpected. I commented what I honestly felt. And here I am : "SUFFERING FROM SUCCESS"

[@randomguy3779]

I am a kid and i can confirm your statement

[@-4subscriberswithahammerad521]

Pain is just weakness leaving the body - some guy

[@user-lz2rk7by3t]

-4 Subscribers with a hammer addiction h u h ?

[@Felix-ve9hs]

if you feel pain it means you are not dead

[@jadrianmc3420]

um.. nobody really said that except u

[@jakoblenke3012]

JadrianMc nah saw that on a gym ad too

[@aperson2730]

I thought it was "sweat" not "pain"

[@muchalucha4939]

Sodium & Potassium: We're gonna end this man's whole set.

[@Hala-ataa]

Most underrated comment

[@ericwalker6546]

¡Mucha Lucha! Not to the ones who took chemistry...

[@limewarrircat4292]

Eat banana and take a pinch of salt before workout. A lot of water and maybe caffeine before workout

[@JosiahFickinger]

I love all the personification. It makes you realize how complicated our system actually is without being humans..

[@ZeRo-yc7zf]

bananas and PB2. Or a banana and cottage cheese

[@TheCetarius]

That's the key sentence of muscle fatigue: "The more regularly you exercise , the longer it takes for muscle fatigue to set in each time. That's because the stronger you are the fewer times the cycle of nerve signal from the brain to contract the muscle has to be repeated, to lift a certain amount of weight. Fewer cycles mean slower ion depletion." Also bigger muscles can store more ions.

[@juanibanez4439]

I train all the time and now Ive reached like super tired and can't even train. So this is because I need to rest and replenish? I rest once a week but even so it's not enough rest.

[@Ohem1]

So if I hook up wires on each end of the muscle I can charge my stuff?

[@13megaprime]

Juan Ibanez you’re probably overdoing it. Maybe try working out one day and resting the next. In other words, work out every other day. That may help. Make sure you’re consuming enough calories and eating the right kinds of food

[@steelmongoose4956]

@@juanibanez4439 It's very possible to train beyond your body's ability to recover, especially if you're not taking steroids. Eating enough (especially protein), sleeping enough, and getting enough recovery time is key.

[@juanibanez4439]

@@13megaprime thank you so much

[@mursol]

Your videos are so informative and they're also fun. Ps: Your animation is so good Edit : I ment "but" in a good way I couldn't think of another word, I fixed everything I did wrong.

[@xioniyxz]

why use "but" it sounded like you didn't liked it that way tho.

[@LawlessLawyer]

Your videos are so informative and also so fun to watch*

[@GAMEOVER-yy6zj]

@@xioniyxz She meant to say that an informative science topic usually gets boring but ted-ed makes them interesting as well as fun to watch.

[@xioniyxz]

@@GAMEOVER-yy6zj that doesn't answer my statement. Anyways at least he enjoyed the video that's what's important.

[@captainobvious3174]

zaina alhour ikr!!!

[@deliat7478]

As a Bio major, I love how simple and entertaining y’all make this process! It can get super complex super fast, but this basic overview is awesome at hitting the big picture points. Thanks for all you do!

[@druncle1977]

Would a increased dietary intake of potassium, ion, and calcium reduce the muscular fatigue I'm experiencing from my new physical demanding job, or do I just have to keep working hard and get bigger muscles?

[@808Efe]

@@druncle1977 you probably already get enough of them. you need to get stronger and bigger if you want your job to be easier. so try working out, it is amazing :)

[@druncle1977]

@@808Efe I simply don't have the energy at all after work. It's very physical demanding, but already packed on some muscle from it. I tried drinking a smoothie with milk, banana, oats, spinaches, and kale. Seemed to do wonders for me. Didn't drink it today, and was back to my usual exhausted mode.

[@theweirdshow2860]

I don't like school but watching this is so much better and actually makes me want to learn about it! I think its honestly better when a person chooses to learn about something instead of getting forced to learn it.

[@pilapila183]

But it would be hard to choose what you want to focus on unless you get exposed to a variety of things. That’s the whole idea

[@Ranstone]

Slight correction: Lactic acid isn't a waste product. As of 2018, it's now taught lactic acid is an anaerobic "fuel source." As less athletic people used it less efficiently, more was found in their muscles, leading early physical science to think it was a correlation to waste byproducts. It was in fact absent from fit people not because they don't produce a mythical byproduct, but because they burnt a higher percentage of the useful, anaerobic lactic acid. This has been taught for a decade, but it has only been taught mainstream for the past 3 years, so I don't blame you for getting it wrong. Never stop learning!

[@Maob08]

This is really interesting because I learned lactic acid was waste. So, the muscles re-use it as fuel source, is that it?

[@Ranstone]

@@Maob08 Much is still being discovered about lactic acid, but basically, it acts as oxygen when your muscles have used all of it's oxygen up.

[@philippvollmer9990]

@@Maob08 I learned, that lactic acid can only be used by the myocard as energy, is that still true? Also lactic acid stimulates fibroblasts to produce more collagen tissue after an injury.

[@santi_super_stunts2573]

Thanks for saying something and not at all explaining what it actually is then. Just saying “hey actually that’s wrong” no “instead it’s actually”. You would be a great teacher.

[@Varelas03]

@@santi_super_stunts2573 created in the anaerobic lactic energy path way (10secs-3minsintensiveoutput)after glucose breakdowns atp, pyruvic acid, nadh & hydrogen is formed(acidity causing), pyruvic acid takes hydrogen turns into lactic acid and attempts to clear it so the muscles can continue to contract, until the pount there is to hydrogen production against pyruvic acid effecting muscle contraction mechanism and enzymetic function

[@scotti3gt]

I'll never look at pumping "ion" the same way again..

[@Ta3iapxHs]

Haha

[@cvpiguy]

Nice 👍 😂

[@sobreaver]

ohhhhhhhhhhhh Arny would like this one =]

[@TheKillerind]

An entire semester of biology explained in one video. Lol.

[@are3287]

A fraction of a 6-week course in high school biology...

[@TheKillerind]

@@are3287 Are you from the US because I highly doubt that the Sodium Potassium pump a long with the associated neurotransmitters are covered in high school.

[@are3287]

@@TheKillerind Finland and it's covered in the 4th course of biology in high school. (You only have to take 2 courses of biology though, so it's optional)

[@abdulmoid267]

@@TheKillerind I am from India and yes we were taught this in high school

[@temp4743]

TheKillerind we learned in my us school

[@golightning291]

Muscles: *fatigued* Every "certified" fitness trainer and HS coach: L A C T I C A C I D

[@aymaneelansari6183]

Most of the time people stop doing a certain workout not because of fatigue but because of pain caused by lactic acid

[@dragan176]

@@aymaneelansari6183 But that's what the while video is about. It doesn't work like that. Lactic acid doesn't cause pain, it likely reduces the pain

[@dragan176]

@@aymaneelansari6183 Where did you find this? I linked a study from pubmed

[@thersten]

@@aymaneelansari6183 not gonna disagree w you but my personal experience has always been that the muscles don't respond way before any feeling of pain. That's with both weights and with running. Extreme high reps or over 4 miles running is a different story however. That's when I start to get lactic acid build up.

[@Pineapple-hx9ty]

@@dragan176 thar u goooooo

[@azwadahbab6829]

As a Biology student, I admit, these videos are a very good way to understand and remember the concepts

[@Vishal-np9pe]

Love you for your unrelenting desire to disperse knowledge among people like me who have actually started liking science courtesy to your content.

[@ramade9040]

The more you know: Our muscle and brain has pair of eyes

[@MrSaverio97]

And they can also understand basic emotions

[@temp4743]

VampireDuck both

[@Johnnyy832]

Lucas Ferreira your brain has an occipital lobe for your eyes :p

[@LilFliccs]

@VampireDuck same thing different meaning.

[@d-rbrtsn9989]

And they are obviously happy to hear from one another.... :)

[@alphaq7721]

Bro I studied all this in a whole semester at my dentistry college And you here explained it in nearly 5 mins . Amazing

[@rodgerbane3825]

When people lift VERY HEAVY, they are training their nervous system more than their muscle. Lifting real heavy, low rep, won't cause so much size increase, but will greatly increase strength though conditioning the nervous system to work more effectively.

[@henk7747]

This should be pinned. So that's how strength training works.

[@Theiserino]

I have learned it is the other way around - heavy and low rep = bigger muscle but not so much strength increase

[@rodgerbane3825]

@@Theiserino What are you calling low rep? How much volume, how many sets?

[@Theiserino]

@@rodgerbane3825 6-8 reps, 4 sets, what do you mean by volume?

[@rodgerbane3825]

@@Theiserino Number of sets. By very heavy I was thinking 2-4 reps. But hey, I'm just going by what I've been told and read, I am no hulking beast by a long shot.

[@Ashish-er4kz]

This looks much like a lucid dream than a informative video.

[@datGuy0309]

Ashish if this is what your lucid dreams look like then you should be worried

[@f.n30]

@@datGuy0309 hahahaha

[@RosieWilliamOlivia]

@@datGuy0309 or happy... this is a pretty awesome dream!

[@kryptokingduels7345]

This looks more like a fever dream

[@frosty2857]

Bomboclaaat😂

[@SuicideBunny6]

How to explain a complicate topic in a detailed yet clear and colourful way. Another brilliant TED-Ed video!

[@AxelVenturatheboss]

When I watch videos like this it really makes me appreciate all the tiny things my body does for me💀

[@xinquiote9572]

Muscle gets tired: Na Na Na Na K, emma head out.

[@emmamorris5696]

im still right here

[@xinquiote9572]

@@emmamorris5696 lol

[@thediamondstewyt8260]

or in other words "Ok Emma, Leave"

[@lavenderturtle3759]

You called?

[@lenin7935]

@@emmamorris5696 bake me a cake mom

[@georgec8077]

Wow, I actually didn’t know that 😂 thanks 🙏

[@abosalah2854]

What do you mean? No one did.

[@IIBLANKII]

Moonlight blade except the people who took anatomy & physiology.

[@IMASTERgraal]

@@abosalah2854 i learned that at school lol

[@jondoe5926]

What is it that you didn't know?

[@showaibzaman400]

Your animation is amazing 😋 and interesting too. (Funny also)

[@izzywang7060]

The brain sending signals animation is so good :0

[@EdeYOlorDSZs]

Ikr

[@BlankVsudo]

This is so dam funny and educational, the ministry of education should learn from you guys.

[@paulhan1615]

1:11 Man, that potassium and sodium pump and the voltage of neurons. I hated biology problems involving those in my high school exam.

[@Danilego]

Weird, I didn't learn that in high school! I learned it in Crash Course :)

[@rebecca4680]

Just learned about the nervous system in Biology last term. The generation of action potentials was pretty confusing at first, and the Na/K pump... gah, it's everywhere!

[@razorcola4545]

paul han I ve to learn this for my final examen, but in reality its a lil bit more complicated

[@antoniomolina3612]

I thought it was chemistry lol

[@samuelvillemure92]

At 1:11, there was no pump, those are channels that open and sodium rushes in because electrochemical gradient. Na+K+ pump requires energy (ATP) and Na is actually pushed out.

[@BobMcCoy]

*_It’s Leg Day!_*

[@harisrehman5474]

_Bob McCoy *L E G S*

[@tanmaypalkar9861]

😫😫😫😫😫😫

[@ongobongo8333]

Every day is leg day

[@brane4859]

ongo bongo There's my man!

[@aidanmattson681]

Every day is leg day Don’t @ me

[@drivethruabortion280]

"Your muscles get tired because you're a lazy good-for-nothing." --Dad

[@killerpussy84]

Wow, what an assbutt of a dad.

[@lincolncolt3183]

We must be related

[@aaaaaa-hh8cq]

@@killerpussy84 bruh no

[@enderredacted112]

@@aaaaaa-hh8cq yes.

[@drivethruabortion280]

I speak on behalf of generic dad tropes, not my da.

[@frego24]

These explanations of how muscles work always leave me with a lot more question than I started with...

[@azuranokurobuchiumi]

the nature of knowledge; with more information you always get more questions, because while it is fundamentally impossible to know everything, humans learn by process of our asking questions from the findings of answers so we must remain ever-vigilant in our pursuit of wisdom.

[@MedicusVishalus]

I love how you make animation and teach non-Biology people understand easily *Good Luck*

[@theshoulderofgiants]

Non-biology people.....are you RK's student I ask???

[@justinliow3860]

I was gonna make a joke about sodium But Na

[@justinliow3860]

@David Z O K You may need oxygen as well

[@donovanrieman3592]

O

[@punee673]

Gabriel Ramirez r/woooosh

[@davgu3313]

NA

[@davgu3313]

Everyone got r/whooshed

[@gravnine]

so what you're telling me... is that to avoid muscle fatigue I just need to stuff my face with salty banana milkshakes?

[@nikosnikos8616]

Exactly

[@blammela]

Yes

[@yeseniarobles4289]

Si

[@My_Arse]

Oui

[@kenfee8961]

Ja

[@Omobsterrrr]

This animation is simply stunning. Its so good

[@justanothertypicalartist3884]

You make things so easy to understand while explaining the science behind why things are the way they are. So it would be cool to see a video about hypotonia and/or muscular dystrophy

[@TrueLifeRetelling]

Agreed!

[@user-cg9kg2qp7y]

I love how the brain sounds just like: *WAwAwAWAwaWawawa*

[@mrixzz8127]

“Kira did nothing wrong” that’s something Kira would say

[@nitro7644]

@@mrixzz8127 That actually means he's Kira? I thought he's dead.

[@felixbeutin8105]

That's what my brain sounds like

[@kalliboymusic]

It's kinda sounds like classic dubstep wobble

[@fatygalonenuno9315]

proper signals sfx

[@loadingyt4487]

Why could school not being this intertaining

[@ea9459]

Yeah school definitely had no effect on you. 😆

[@mrixzz8127]

@Ôœgiłuß • 15 years ago you shouldn’t be talking

[@ea9459]

@Aziz • yes 3aziz

[@Stillcantthinkofaname]

*I see what you did deer*

[@jayantzalki8039]

@Aziz • LMAO 🤣 'EA Sports'

[@catherine_404]

This is SO very cute!!! And educational. These videos are a great help to adults like me, who forgot a lot of stuff from school, and can refresh all that knowledge while chilling and relaxing. I love how kindly the voice sounds. This style, in general, encourages to learn (or re-learn) more 😊

[@OmarDelawar]

3:07 when your muscles try to fly but haven’t grown any wings yet lol

[@Liza-st4ut]

Ha. Ha.

[@kievalindajao6170]

The person who commented this must be the kid in the back

[@gavryy2549]

😳😳😳😳

[@dun8410]

They need Redbull.

[@cvpiguy]

Lol the animation so funny

[@prithvirajdj]

This video somehow makes me feel stronger now. 😂😂😂

[@beyond_the_infinite2098]

I've watched many videos on muscle building and hypertrophy and have been weight training for years and never seen this info. Very informative and cool animation.

[@Fjuron]

Wow, such an in-depth explanation in such a short amount of time. Color me impressed.

[@romeomsfg3109]

It's amazing how you guys are able to make complex things easy to understand even for kids. Congratuliations!

[@stevenhinkle6957]

These animations are adorable ! Amazing job to whoever drew this

[@jojo-lp4rd]

really great artwork and animation here, the colors were so vibrant and it really helped me absorb the information. They should show this at school.

[@lucifercoxi8324]

That animation kept a smile on me for the whole time.

[@Lucky1Yena]

Wow. I pretty much aced my exams at school and I STILL didn't know what EXACTLY made muscles tired. This has cleared that up for me.

[@workoutlui]

Thank you very much for this simple, yet informative breakdown of muscle fatigue. My 13 year old son was inquiring recently as he’s on his school cross country team. This says it all! Thanks again! 👍🏽

[@dainedada]

This animation is brilliant! Love the big grin on the contracting muscle.

[@waseque_ahmed]

Such a sophisticated design! Human body alone is so mysterious, let alone the universe.

[@incognitotorpedo42]

Yeah, three and a half billion years of evolution is amazing, isn't it?

[@ayushthumbarathy3961]

It's called survival of the fittest. and billions of years of evolution.

[@whoknows9857]

​@@incognitotorpedo42 It's honestly disappointing

[@incognitotorpedo42]

@@whoknows9857 Evolution is disappointing? If you say so.

[@thersten]

@@ayushthumbarathy3961 actually, it's called natural selection.

[@xaio-xen4433]

How many more art styles can you come up with?

[@ishaboy5090]

Sound effects are on point as well

[@fulcrum2951]

Yes

[@randomcommenter6734]

They have different artists working on every single video, so yeah, A lot more

[@SotraEngine4]

This makes so much sense!

[@QN00]

Amazing animation! Ted should give more projects to this artist!

[@noblepolygon8694]

This was so good. I do full body lifts and run 10k everyday. My muscles stopped getting sore after about a month and this explained why.

[@AYEEYOBEASTBOY]

But how do u not get tired bruh??? Everyday full body? Do u Max or no? And do you take roids ?

[@dosomestuff1949]

@@AYEEYOBEASTBOY he prob does like on excercises per body part lol. And doesn’t go all into it. That’s the only logical explanation

[@PhysiologywithChristian]

Thanks for watching! We had a lot of fun making this video, and really hope it's useful! There's also some quizzes surrounding the video, and extra information available on the Ted-Ed website!

[@momandude]

It's such a fantastic video! Very informative and helpful!

[@chrism8690]

I loved this video!! Thanks!

[@youngyoung9276]

Great, informative video!!!

[@medsim6638]

Fantastic work!!

[@GodSpeed1105]

3:04 Teacher: Heres work now do it... Me: *The Muscle* ...

[@zilchy2251]

Fun fact: the heart is just one big muscle which cannot get tired or else you would die

[@AirQuotes]

Yer but what stops it from not getting tired.

[@EddyLeeKhane]

@@AirQuotes that's the question

[@DD-fh6gy]

@@AirQuotes sheer willpower

[@nelsonvaldez9771]

@@AirQuotes Tren

[@uziman1322]

@@DD-fh6gy do you will your heart to pump 100,000 times everyday ? It Is a sign of God.

[@hunter.1]

Simply amazing

[@TannerForrest]

I once made a chemistry joke, *There* *was* *no* *reaction*

[@briansammond7801]

I'm sure if you keep trying, you will find the solution.

[@TannerForrest]

Na(OH), I’m too basic for that.

[@thefortunateson5593]

Must have been some Noble people.

[@Barsabus]

There is always some reaction

[@OG_Jin_Bling]

A chemistry joke once is not enough... It needs to be periodic.

[@stormysamreen7062]

3:10 Idk why I felt bad for that muscle.

[@elizabethlara8439]

Me encanta la animación, es una forma muy divertida de aprender sobre el cuerpo humano, ya que es bastante complejo entender y recordar el funcionamiento de todo el cuerpo. Aspectos que desconocía: 1. La fatiga muscular no solo es producida por el ácido láctico si no también se debe a la capacidad del musculo para responder a las señales del sistema nervioso para contraerse o relajarse por medio de la acetilcolina 2. Aun cuando los iones como el sodio, potasio o calcio estén agotados dentro o alrededor de la célula, abundan en todas partes del cuerpo. En poco tiempo vuelven a las zonas donde se necesitan. Entonces la fatiga muscular desaparecerá cuando el músculo se restablezca de esos iones.

[@NightWear21]

😂 being an enthusiast of working out. This is hands down the best and entertaining video i've seen. Wow. I was equally lol'n as well as being refreshed and informed.

[@nicole-secondaryemail-mort9617]

Key point: There are ions in and around muscles cells (K+, Na+. Ca2+). THese ions are necessary for muscle contraction. They can be depleted after repeated muscle use. (ion depletion @3:40). - If you exercise regularly, less signals need to be sent from the brain to the muscle cell to contract your muscle. Thus there is slower depletion of the ions. @3:30. @00:35 Reasons for muscle fatigue 1) lactic acid 2) running out of energy? (what does that means precisely?) 3) muscle's ability to respond to signals from the brain muscle contraction: - THere is a balance of Na+ ions outside the muscle cell, and K+ ions inside the muscle cell (@2:09) - Due to nerve signals via motor neurons, these charged particles exchange Na and K Action potential 1:35 - is an electrical signal spreading through the muscle cell. - muscle cell releases calcium Ca - Ca causes proteins to lock together, causing muscle contraction @2:00 ATP - is a form of energy - is stored in muscle cells - it is used by muscle cell to contract. It can get used up. @2:50 - there need to be enough Na+, K+ and Ca2+ ions near the muscle cell to continue muscle contraction. - these ions are used up during muscle contraction, but also repleneshed to some degree. - action potential? @3:05

[@jessicagoulet9260]

But how do ions deplete around muscle cell membrane if they flow in and out?

[@mauz791]

The animations so smooth that it qualifies for an ice rink

[@noahpehowic6080]

It's amazing and perplexing how many things happen in the most simple and tiniest of things.

[@millamant]

That was the cutest animation ever. Even made me chuckle a bit

[@jaykay6249]

Thanks to the the animation I now feel like a factory.

[@KikomochiMendoza]

Now I can exercise. WITH SCIENCE!!

[@CarlosRodriguez-dd4sb]

This presentation is a thing of beauty

[@itanmayi]

The narration is so soothing

[@a_sher2805]

I've always wondered about this whenever I workout. Thanks for the video!! P.S. I always like the animation. It always helps me understand it a bit more.

[@deepmeyt]

Just worked out and was wondering why 20 is my push-ups limit

[@johndanielvedania9501]

Thats 20 like for the 20 push ups

[@sidharthsidhu8774]

Try different push-ups like ... Incline ...decline.... diamond... wide

[@joyjuneja7091]

STOP TYPING

[@sense7074]

Keep trying, you have to crawl before you can walk, and you have to walk before you are able to run. Soon you’ll be flying through the skies at Mach 7 speeds :P

[@GambyEspion]

Mines .5

[@PurpleFreezerPage]

I wish there was a video like this for mental fatigue!

[@FinalMiro]

Fun, Im reviewing my lessons of last year while having fun and learning what I needed!

[@rociosilverroot2261]

This explains a lot. When I'm exercising hard, after about ten minutes, I'll start time feel like I can't keep going. I'll usually take little micro breaks and slowly increase my intensity back to where I had it.

[@hiddenfog1]

Awesome job animating that explanation Congrats to you and your team! Very didactic and pedagogical way to share knowledge 💪🏼😊👍🏼

[@858sameera]

One of the best illustrations! Keep up the good work guys! 🔥💯🤟🏻

[@Itachi69252]

Stay safe and healthy ❤️

[@Manic_Mitch.official]

I think this gives a whole new meaning to “muscle mind connection” perhaps guys who get really big muscles have a better response to signals sent from the brain despite fatigue

[@mihaimazuru1422]

Average person:i don't know what this is. Medicine student :hold my beer

[@beksultankalbaev2626]

We studied it in 10th grade at biology class.

[@mihaimazuru1422]

@@beksultankalbaev2626 you are right but that was just a joke

[@GAMEOVER-yy6zj]

I'm an engineer but love all branches of science and mathematics equally. This is the basic biology you learned in junior high school.

[@mihaimazuru1422]

@@GAMEOVER-yy6zj thanks and luv u 😇

[@ryanmohan3041]

@@GAMEOVER-yy6zj Well done to you. The part of the Ca job on Tropomyosine and Troponine though, I doubt many know. Why do you all have to boast about your knowledge?

[@raze7x]

Animation is so nice and clear!

[@juiceofsapho]

Whoever animated this is a pure genius, and the content is amazing as well

[@jazzypari]

The animations are so well done and engaging. And the narrator is, as usual, the best . Bravo 👏

[@mageinabarrel802]

Lol I'm actually exercising as I'm watching this.

[@ceskale]

Weird flex but ok

[@nicolesong6199]

how

[@bhupindertube]

Funny, I just did some biceps and youtube suggested this video! And I'm glad I've watched. Great video - funny and knowledgeable!

[@valenciaa.1404]

Never imagine muscle could be this cute 💕

[@georgethefish6725]

Oh my God! These are pretty unknown, but extremely interesting information. Keep up the work 💪(to get stronger 😄)

[@wasky3397]

0:34 better than skrillex....seriously im going to use that on a track.

[@sabaiftkhar4270]

Wow the animations are great, easier to understand and will stay in mind for longer time

[@martiatact6306]

Beautifull animation. Very organic. It fits in the theme perfectly

[@Oscar-sc2rz]

Is this why there is stuff like water and Gatorade which have added "electrolytes"?

[@mikelzubieta6003]

Kind of. When you exercise, you sweat. The sweat contains both electrolytes and water. If you drink just water the balace between this minerals (electrolytes) and water alters, which can cause many problems. That is why in long races you need salts, minerals or electrolytes (they refer to the same thing).

[@dakshbadal7522]

@@mikelzubieta6003 Sweat does not contain electrolytes

[@1077i3]

​@@dakshbadal7522sodium

[@lightyearahead]

Our body functioning is so complex and it is smartly designed.

[@piyalegendghosh9072]

Wowwwwww..god bless this chaneel for sharing such amazing videos!!!!!

[@wesjonm]

The illustrations are so good! 😍😍😍

[@Aboredbulborb]

Me: hey mom did you know (thing on Ted-Ed)? Mom: you know, not everything on the internet is true. Me: but it’s Ted-Ed! Mom: I have spoken.

[@randomspeedruns6292]

Lol

[@Matheus_Braz]

Also Mom: Coronavirus spreads through 5G 😱

[@catsouplover7745]

@JGD could u give exmps?

[@anti-loquax2758]

@leafonabreeze this is a genius response ngl

[@aoi1640]

@JGD Na (Sodium)

[@frederikoadr]

I remembered this from biology class in high school, disappoint that I'm not surprised

[@paradoxicalzenith6731]

This is more complex that I thought but it made it even more interesting

[@xprinceduranteofficial9275]

Apart from loving this very informative content, I just want to point out the lack of explanation on the part of "THE MORE REGULARLY YOU EXERCISE, THE LONGER IT TAKES FOR MUSCLE FATIGUE TO SET IN EACH TIME ETC...." For those who already know how the muscle repair works, it'd be very easy to grasp that idea, but it's not in the case of the opposite. The video forgot to be clear and explain that the MOST IMPORTANT reason why our muscles get less fatigued as we continue the exercise training is because as we lift, microscopic muscular damages happen to our muscle fibers and sarcomeres to be precise. Only after that moment would our brain receive an inflammatory signal from the muscle site that was used for lifting causing our brain to repair the muscular damage through the process of CYTOKINESIS. Myoblasts form myotubes and myotubes form muscle fibers allowing our muscle fibers to increase its diameter and motor neurons connected through neuromuscular junction which ultimately leads to more ACTION POTENTIAL (MUSCULAR STRENGTH) just after the recovery period. Now, there's an exception to the MORE-PAIN-MORE-GAIN principle for the fact that just because our muscles experience pain (caused by prostaglandins) doesn't mean PAIN always gives you GAINS. In VICIOUS CYCLE THEORY, our agonist muscles (BICEPS) receive at least the most pain during DOMS and muscle fatigue period unlike our antagonist muscles (TRICEPS), but still our antagonist muscles are symmetrically developed in size regardless of how much pain the agonist muscles receive. It seems that our antagonist muscles don't rely quite much on pain perception to grow but rely on its muscular activity and contraction.

[@chappyhappy8483]

Towards the end of the video. It incorrectly shows muscles expanding when working. They contract.

[@potatomanlp4812]

When you extend your arm. Does the tricep contract or extend. I feel my triceps after I work out when i extend my arm so does it in that motion contract?

[@chappyhappy8483]

@@potatomanlp4812 Muscles are tighter when they contract. Like when people flex their arms and show off their biceps. Biceps are in a contracted state. So extending arms straight is contracting tricep.

[@LoveDoctorNL]

Natrium and Kalium, what a vital role they play.

[@alexbarac]

Ya, that's why you need salt in your diet :)

[@pianoraves]

Eat Bannanas!

[@kalmahnalyd4615]

This was very educational

[@AntonioMeres]

I have no idea how cute my muscles are. Come on! The illustration? Sooooo good.