Type 1 and type 2 muscle fibers | Muscular-skeletal system physiology | NCLEX-RN | Khan Academy

[@frankem4837]

Type 1 a marathon runner Type 2 some Usain bolt dude

[@rikschoonbeek]

Isn't the power of type 2's high and the power of type 1's low? Or I am not getting the concept of power correctly.

[@robertmyatt]

Nah, you're correct.

[@rakchiangmai]

Rik Schoonbeek You're right - Type 1 fibers can carry sustained but small loads, whereas Type 2 fibers are only recruited at high levels of muscle force (and thus more powerful), they just can't sustain the force for long.

[@robertmyatt]

There's a very simple method to remember the difference: 1 = long duration + low power = get tired slower because of low amount of force produced. e.g. jogging. 2 = short duration + high power = get tired quicker because of high amount of force produced. e.g. sprinting.

[@snowqueen19900]

+Rob Myatt thank u

[@coderain1816]

Right, think of type 2's as your arm muscles and type 1's like the ones in your thigh.

[@awrite2dream]

Great explanation! I learned it as type 1 = slow oxidative and type 2 = fast glycolitic, so we didn't have the problem of the useless names!

[@SocksKr]

I really lost my shit laughing at "*equally descript* type 2 muscle fibers" thank you for starting the video hilariously!

[@claudius189]

Holler if you caught the "deep breath" after "easily fatigue" (around 6:55)

[@estiakshakil2663]

Smart way of teaching... Take love from Bangladesh sir❤️❤️

[@rickshaw711]

Taking MCAT on Saturday so I’m justing brushing up on high yield stuff that is a little fuzzy, and the type 1 and m1tochondi1a analogy is golden. I’ll never forget now!

[@Pro.mkSportsFitness]

Thank you for being simple. Great presentation 😍

[@rodrigokannon4944]

A trick : you can watch movies on flixzone. Me and my gf have been using them for watching loads of movies these days.

[@torincody8378]

@Rodrigo Kannon yup, been using Flixzone for months myself =)

[@tylane6192]

@Rodrigo Kannon Yea, have been watching on Flixzone for since december myself =)

[@ashrafAL111]

Excellent explanation - Excellent delivery- Excellent Voice - Great Job - I loved it

[@SuperVale0]

That was really a good piece of information. made me understand better about them. Thanks man!

[@taldavis8874]

this was explained so well thank you !!!

[@guidofranzo5117]

The power in type 1 is weak and it's strong in type 2

[@cs3518]

+Guido Franzó agreed

[@antdx316]

+Guido Franzó I think red and white fibers are independent. I've been working on white for 3.5 years and when I go light for endurance it feels mad heavy. I never worked on red in those 3.5 years really. I always thought it was about going heavy then light is easy but nah. Red fibers have to be brought up with endurance starting light like doing white at the beginning. There is no avoiding it because the white fibers will always kick in making red fibers never be worked. I was wondering how the people who do ruck sacks with massive weight do it. They said they started light then upped the weight next week or back down then eventually they got to their weight. I look stupid doing light weight like it's hard. Now I'm changing up my workouts to have 5:1 light to heavy so I don't look like a total weakling. I need to catch up my red fibers but the only way is to lose all ego entirely when doing the weight. I have to really break it down to 5 lbs and endurance that for a long duration. I can do way more that weight but I'm only going to work white and that's not what I need. Getting tired all the time w/ light weight and wondering why it's hard to hold it a long time is because red fibers are bad. Working white is great because the joints, connective tissue, and bones are probably super dense and strong. People who only work white can easily rip and fracture those things.

[@MrPridizzle]

oh, absolutely ;)

[@mariejanellemoore8089]

This is a great video, but I think it's missing the differentiation between Type 2A and Type 2X. Type 2A is moderate (size) and red in color. It is resistant to fatigue but can also contract quickly if needed, and has both glycolytic (fast) and oxidative (slow) function.

[@NetjerAshe]

OH he's good! I got all that very easily and smooth keep that up!

[@pablo525ar]

I loved this video. I shared it in my class with everyone

[@abdola-g6v]

Thanks Mr. Khan. We appreciate what you are doing for us, greatly.

[@9-volt247]

That is not Sal. That's Raja Narayan.

[@jaredgrantduxfield7153]

Firstly, thanks for the great video! I have a question about this: You've said that type 1 muscle fibers have high strength and power, while Type 2 muscle fibers are weak. This is contrary to my understanding. My understanding is that Type 2 muscle fibers use anaerobic energy and create explosive, powerful movements (high strength and power) while type 1 muscles, relying in the slower delivery of aerobic energy, are not able to produce the same amount of power, so are relatively weak. Am I wrong, or is this a mistake in this presentation?

[@oliverstrand6]

A man who knows how to think, Thank you!

[@FiddiTwo]

perfect timing for me to find this gem, thx !

[@AugustooCunhaa]

Fantastic! The most logical explanation I've ever seen for this subject. You only mixed the things up in the power line.

[@kayo2615]

Great video! made perfect sense to me and helped me conceptualize concept for my test. Thank you!!!!

[@VolcanicLioness]

Thank you! very informative and easy to follow

[@virupannamedikinal]

Thank you so much Sir and Khan academy

[@ayooalcaideee7758]

Great Help Thank you much💯

[@SafaAqeel-r9c]

thanks 🌹

[@Weltte]

Thank you!

[@evilj3836]

Great job 🤙🏻 thanks

[@leahpatek4653]

God damn this makes it so intuitive, thank you

[@ehudkirsh766]

Power = Energy/Time - so Type II is more powerful than Type I

[@omarbenilles5207]

you mean more endurable, not powerful.

[@sour3000]

@@omarbenilles5207 no you're wrong and he's right...

[@javascriptkiddie2718]

@@sour3000 endurance is different from power. Endurance is durability at a particular workload, but power is capacity of the workload. This is the biggest difference between powerlifting and body weight exercise.

[@rajkumarloya8592]

@@javascriptkiddie2718 yes...you are absolutely correct type 2 muscle fibres are more powerful & mostly used for heavy weight lifting....while type 1 fibres have low power but fatigue resistant thats why useful for endurance activities like marathon

[@jessgross1170]

what about difference btwn Type 2a and Type 2b???

[@mjclaudianava5397]

Hi, I read that inactivity has been shown to increase the risk of high fat content in the multifidi muscle. does that mean the Aerobic energy produced in this muscle is stored in the form of triglyceride (fat) due to inactivity ?

[@noorclark2226]

thank you for your amazing explanation, but according to Lauralee sherwood for human physiology, it is saying that muscle fibers type two especially (fast-oxidative) are red in nature, the only type of fibers that is not red is fast-glycolytic which is one of types two muscle fibers.

[@rebeccabailey5126]

Thank you so much this lecture has really helped. 🤗

[@mikelindqvist]

I also just saw a video saying red fibers are the fast ones! Please answer, difficult to decide who to trust even though I want to trust the K Academy!

[@mahmoudahmed3468]

Man this golden role is op🔥

[@whereisthehall]

I wish in muscle fibers Type 2 a & b differentiation should have been mentioned with more explanation including type of ATPase activity and oxidative capacity which explains better in understanding of the muscle fibers.

[@joyfuljoy3629]

^^^THIS^^^

[@KonstantinosEvgeniou]

I have a question A teacher of mine once said that as we get older our muscles are slowly becoming "white" like "tendons" (not literally) Did he mean that when we are young we have more type 1 mucles fibers and as we get older they transform into type 2? But that does not make any sense cuz marathon runners that need endurance muscles are always older people.....i am confused can anybody explain me what happens to the mucle fibers as we get older? And if age plays a role in the concentration of type 1 muscle fibers?

[@Spicydoc1]

So the Simone answer is that perhaps an individual was misinformed- many of our grade school teachers got it all wrong. After Med School, we likely got the correct answer.

[@melodyqueen4212]

thanks a lot for real I was having a hard time about this subject now I learned :))

[@AmandaVF1]

Yup. That was awesome.

[@rickeejay6363]

what a gift you are thank you :)

[@kitty5511]

thanks!!

[@memoryofthefuture2379]

What kind of cardio and calisthenics would I have to do to develop type-2 muscle/red muscle on my arms? Thank you.

[@thatlithuanianguy6589]

Lift HEAVY

[@dekalbgarealtor]

Gr8 job! You really did make that a whole lot clearer. Thank you.

[@prakharvishnoi8457]

What about size/fibre thickness?? Plz update, i await eagerly

[@phillipdoan9919]

I think you're very clear. thank you

[@Buraqflyinghorse]

I've bought twitter.com/490f549205676880f/status/742668391975096320 . This prоduсt is аwеsоmе. I gainеd wау mоrе musссlе mаss аnd rеduсеd bоdуууу fat fаstеr thаn аnу оther рroducts! Туре 1 and tуpе 2 musсlе fibers

[@zahraabkbk4977]

Amazing

[@benjaminwestrup]

Thanks for this

[@mahmoodmoosavi3616]

thanks. but how do u know which one is dominant in your body? when I compare myself whith someone of the same waight and age group and pretty much the same fitness I am usually stronger but it does not last or my muscles and whole body look bigger than them. please help me find out which type mine is thx.

[@adamnorris6101]

Mahmood Moosavi if you do alot of running or swimming crossfit...then u got more type 1. if you do heavy weights thats type 2. if your squating and deadlifting your gonna increase type 2 in your legs and back which is mostly type 1s.

[@Nicole-bc1bm]

Thank you for this video!!

[@ariaroayaie4396]

Type 2 muscle fibres creat more power than type 1 . Unless you meant something else by power

[@casse4019]

I was also going to comment this!

[@benclarke5914]

i think the power stats need to be swapped, maybie means power per gram of red vs white meaning that white has to be big to compensate , but i'm not sure about that either

[@markjones1444]

Type 1 are slow twitch muscle fiber, and they are red because of the myoglobin, which is like hemoglobin, therefore oxidative, using oxygen(aerobic=with oxygen) Type 2 are fast twitch, and are white, because they don't need oxygen to use ATP, and are called anaerobic.

[@mauriziovaluta7980]

Thanks for your video, but I am confused. I just found two explanations where they say that "Type 2" are actually legs, back and bigger muscles, the ones you actually categorize as "Type 1" in your video (you say that Type 2 are your finger muscles). Type 2 seem to be the red ones according to two random searches on the internet (white in your video). Can you please clarify? Source here: buildingmuscle.org/muscle-fibers-explained-type-1-and-type-2/ www.quora.com/What-are-the-examples-of-type-I-and-type-II-muscle-fibres Both the above state the opposite of what you are saying. I am confused as your video seem to be quite deep.

[@mikelindqvist]

Nevermind. I trust this one hands down. 👍

[@aby3773]

This vid is wrong my friend, there is type 1 and type 2A and type 2B muscle fiber , also type 1 is weak and type 2B is strong. Don't trust anything you see online jus bcs he explained it easy. I have to study this for college and I almost fall for it!!!

[@sunnyluo3287]

brillant

[@firmancardi]

is it possible for type 2 muscle fiber turn into type 1 muscle fiber?? or its just created that way?

[@marie-audepicard-turcot6511]

It is impossible; you are born with a certain proportion of type I and type II, which you can't change. However, when you train them, you can enhance their motor recruitment, size and efficacy at using energy!

[@00MrPanda00]

Type I: -Slow -Oxidative Type II: -IIa: --Fast --Oxidative --Glycolytic --Higher Production --Fatigue Resistant -IIb: -- Fast --Glycolytic --Fatigue Quickly --Strong

[@Auguste86]

Great

[@xstatic6985]

Please add a correction to your video regarding the bit about Power.

[@StephonsDoom]

Imma be so fr rn when I say this is the most khan academy video I’ve ever seen. Bro makes every statement using the most complex words possible , this is why kids grow to hate school. Simplify things. We all know you love to sound smart. Make it understandable. I can go watch any other video on this subject and come away with a much much better understanding which is exactly what I did. There’s a difference between a great teacher and someone who loves to sound smart. One teaches and one doesn’t shut up.

[@xeonix7050]

I can twitch every muscle in my body at will and make it twitch rapidly. They get tired very easily. Non of my muscles have endurance but a lot of force output. I have at least a 90/10 ratio leaning towards fast twitch. Fast twitch definitely have more power but less endurance

[@thatlithuanianguy6589]

I’m blessed with 50/50

[@thatlithuanianguy6589]

I can be explosive and last a good 40 minutes

[@xeonix7050]

Rory Colwill it’s always good to have endurance. Honestly I can lift really heavy and sprint fast but In all honesty I’d rather have endurance. Cause what’s the point in being strong if it only last for a little while.

[@thatlithuanianguy6589]

Xeonix it’s great but you will be less explosive if you work on your endurance

[@ASHTUTORIAL]

👌👌👌👌

[@kathiacortez2013]

Wait so what about oxidative-glycolytic fibers type 2A? :( I'm confused lol

[@asfandyarmk2466]

right

[@JesustheonlywaytoGod89]

this guy is total bullshit, there is 3 muscles fibers.exemple: when you do sprint 100 metres and comes back at 9 km h and do again 100 m sprint and repeat it over and over again, you will be very good at it, and so you aerobic system will be very good at doing it.but, because you use your fast muscles twitch type 3, (very fast muscles twhitch), and comes back to very low intensity (fibre 1), if you must keep a speed of 13 kmh per hour for even 6 minutes, you will not succed if your training were sprint and comes bacl with low entnsity for sprinting again...so, aerobic can need as well fast twithches muscles, this guy say only bullshit stuffs, aerobic is very wide, it can be endurance with sprints intervals or endurance whith classic intervals, thoses 2 kinds of exercises are opposite and if you work more on sprint interval, you will get better at sprint intervals while if you work more on classical intervals (12 kmh per hour 16 km h er hour for exemple), you will get better at marthon for exemple, but it doesnt mean you heart and aerobic sysem will be better since the guy which does only classic intervals will tire quicker with sprints intervals... sprint interval are aerobic too so... if you want to get better endurance at sprint intervals you need to have more very fast twitch muscles, and if you want to be better at marathon you need to have better muscles type 2 (not fast twitch muscles neither slow, it's middle).

[@AusOpening]

so do you know how to train specifically to build type 2a in order for 200m/400m & 800m?

[@Textbook000]

Da bestest

[@Pamela777Carlita]

Thank you very much!!! you saved my but.

[@DoJo-HyGe]

Type-1 = LESS force, Type-2 = MORE force

[@osmosinsane9611]

Type 2 is weaker? I though long muscle fibers were more explosive and could lift heavier.???? Am i wrong????????? I doubt that

[@kylephaneufmusic]

Set to 1.5x speed in order to be bearable.

[@frigglebiscuit7484]

and the golden rule is: mitochodria is....THE POWERHOUSE OF THE CELL! im sorry xD

[@kaspersorbom2837]

like your prensentations

[@ayushaesthetics7172]

Type 2 power is not weak, if it is then Usain bolt is weak.

[@nutritiontrivia]

awesome! but you got the power part wrong. According to your power explanation, Mo Farrah should be able to beat Usain Bolt!

[@YouDabian]

Thank you for pointing that out! I was getting confused. Also his storage explanation seems simplified at best. As far as I know, CrP is (primarily) used to convert ADP into ATP.

[@user-cl3gz9ey1w]

Is type 2 fascia

[@فيديوهاتالمشاهير-ت4غ]

إياك ومرافقة المنافق فهو ماكرٌ جداً : "يأكل مع الذئب وينبح مع الكلب ويبكي مع الراعي...!!! #حقيقة 👆

[@babatomiwaburaimoh7263]

i really felt that exhale at 6:56

[@dragonballov]

arnt type 1 muscle fibers red cause of myoglobin (a red pigment? ) :/

[@aby3773]

yes, type 1 has myoglobin, a red oxygen binding protein !!!

[@coryallen3817]

I've done a lot of studying on this over time. Where was the talk about type 2a and type 2b? Where was the talk about the way type 2 stores glycogen, in the muscles themselves as carbs and sugar? Where was the talk that a type 2 fighter would beat the shit out of a type 1 in the first 45 secs of a fight, and a type 2b might do far worse? type 1 depends on oxidation for sure but how is that going to work when they're being destroyed and choked out in the beginning? With type 2b the energy is there waiting, in the muscle, doesn't need oxygen for a good while. Person getting ready for your MCAT, the areas of the different muscle fibers are closely proportionate. Men have a lot more area of type 2, the whiter looking fiber, women have more type 1 - muscle that depends on triglicorides and oxygen that is why it looks more red. The triglicorides stored in the fat cells in type 1 and have have to have oxygen for this movement. Type 2 is from starches and sugars our bodies store as carbs in the muscles. We call that glycogen. The byproduct of using it is your lactic/ lactate acid, that store in the muscle and it reacts right away and much stronger but can't hold out too long. That lactic acid has to drain from your body using a slow twitch (type 1) exercise. Or from a massage, it's why they give you a bottle of water. For the toxicity of lactate. Going back to what I said about the type 2 a or b, beating the shit out of the type 1, they'd have to do in those 45 secs or so before they deal with fatigue. Then it could be over. A person that cross trains mixing their muscles 1 and 2a will have the best of both worlds. Love to all! I hope my information isn't out dated, I just tried to add more clarity. Sorry for criticizing the video sir

[@RaviKumar-mt1ox]

any power lifter has type 2musle fiber ..u mention that typ2 musle hv week power ....r u joking dude...wil u explan this

[@berner]

Christ... can you tell us WHAT muscles are type 1 and type 2? Example: Are calves type 1? Are abs type 1? Pecs? Forearms? Why cant people just do a video that gets to the point instead of flooding youtube with "This is how type 1 fibres function" videos?

[@haugealx]

how the fuck do you write so pretty on a computer? is it possible to learn this power?

[@samer-xz2bo]

baby

[@3rdpartyU5er]

Sal can you get a pop filter between your mic and your mouth please?

[@mayaswinehart6251]

+3rdpartyU5er lol this isnt sal..=(

[@3rdpartyU5er]

Damn, well whoever he might be. My apologies

[@HDSofficial]

Thank you.

[@MeiziVu]

awesome

[@jessicajess2980]

Thank you