Healthy Lifestyle
11 major muscle groups This quick video goes over 11 major muscle groups in the body. Rishi is a pediatric infectious disease physician and works at Khan Academy.
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- There are 11 major muscle groups in the body
- and I'm just going to go through them really quickly
- I'm not going to talk too much about the names
- of the muscles, but I want you to get a sense for where they are located
- on the body. So the arm, the leg, and the core.
- and I'll write that over here. So the 11 groups
- there are three - actually four- in the arm.
- three in the leg
- and four in the core.
- And just being familiar with where these muscles are is actually
- really really helpful and powerful because when you
- go to the gym or you're working out somewhere else,
- it's important to stretch these muscle groups out
- it's important to also focus on each one
- and try to figure out which one is weak or strong
- and develop whichever one is imbalanced
- sometimes the left and the right side are not equal in their strength.
- So it's important to be aware of where they're located
- and we're going to go through that really quickly right now.
- So let's do the arm first.
- You have first the forearm. And you can see that one the best from the front.
- And above that you have the biceps, and that's about right there.
- There's your biceps. And behind your biceps, actually on the other side
- is the triceps, and that's right there.
- And above both the biceps and the triceps is the shoulder.
- And actually I'm going to draw that right there.
- You can actually see it from the front and the back.
- I'm just gonna draw it right there, just for simplicity.
- So those are the four arm muscles, and now let's just jump down to the leg.
- And put in the quads, this is your quadriceps.
- And this is actually called the quadriceps because it's actually four different muscles working together
- And below the quads- or actually on the other side of your quads, rather- is your hamstring.
- Right here is your hamstring.
- And I want to give a special shout out to the hamstring
- because it does a lot of work and a lot of people forget to stretch it out.
- And you can often get in a lot of pain from not having a good stretched out hamstring.
- Below it is the calfs.
- And the calf is actually sitting on the opposite side
- of the bones in the lower leg, the tibia and fibula
- which is why it's so boney on the front part of your lower leg,
- but on the back it's very meaty and muscley.
- So you have three leg muscles there.
- Now let's put in the core muscles.
- So you have, let's do the front first.
- So right here is where we'll talk about getting a six-pack.
- Your abs. That's an important muscle group.
- Helps you do sit-ups.
- And above it is your chest. So right here is your chest.
- And there are two in the front. And similarly there are
- two in the back. So the back ones-let me do in yellow-
- are your trapezius, and trapezius actually kind of
- comes down like a diamond almost- kind of like that.
- And it helps with the neck and upper back.
- And then almost like you have wings in a way
- you have two other muscles, or actually another muscle
- with two sides on it, called the Latissimus dorsi.
- Actually kind of a large spread out muscle- and I'm not drawing all of it.
- But it basically kind of spreads all the way through your back
- and this is the major muscle of your back.
- So when people say "I threw out my back" often times, if it's the
- lower back they're talking their Latissimus dorsi.
- And that means that we have now our four core muscles shown up here.
- So counting them out, we've got our 11 muscle groups.
- So just to again go over it very quickly, we've got one shoulder, biceps, forearm, and triceps.
- In our leg we have our quads, our hamstring and our calf.
- And then in the core of our body we have our abs, our chest,
- our upper back-which would be the trapezius- and the lower back-which is the latissimus dorsi.
- That's your eleven groups.
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