Table of Contents:
Type of Muscle Contraction
Video taken from the channel: The Charsi Of Medical Literature
Contraction types (skeletal muscle 4)
Video taken from the channel: KINprof
Isotonic, Isometric, Eccentric and Concentric Muscle Contractions
Video taken from the channel: Scientist Cindy
Muscle Contraction Types
Video taken from the channel: ORTHOfilms
Myology | Muscle Mechanics | Types of Contractions & Levers | Part 3
Video taken from the channel: Ninja Nerd Lectures
Isotonic & Isometric Contractions
Video taken from the channel: Paula Humanatomy
Isometric vs. Concentric vs. Eccentric, what’s the deal?
Video taken from the channel: James Braithwaite
An Overview of Eccentric Muscle Contraction Examples. Eccentric contractions are essentially the yin to concentric contractions’ yang. The two work in tandem to Biomechanics. This is an apt way to describe when a muscle is both activated and lengthened.
During an eccentric Negative Work.In an eccentric contraction, the external force on the muscle is greater than the force that the muscle can generate, thus the muscle is forced to lengthen due to the high external load. The maximal force generated by the muscle is the highest; however, the energy consumption is the lowest.
An eccentric (lengthening) muscle contraction occurs when a force applied to the muscle exceeds the momentary force produced by the muscle itself, resulting in the forced lengthening of the muscle-tendon system while contracting (Lindstedt et al., 2001).An eccentric or braking contraction is an interesting but routine type of muscular contraction that seems like a paradox: the muscle is contracting even as it is lengthening!An eccentric contraction is the motion of a muscle while it is lengthening under load, where the muscle contracts to control joint motion performed by an outside force.
An example of an eccentric contraction is when performing an exercise such as a biceps curl.Eccentric contractions, characterized by the lengthening of the muscle-tendon complex, present several unique features compared with other types of contractions, which may lead to unique adaptations. Due to its specific physiological and mechanical properties, there is an increasing interest in empl.An eccentric contraction is a type of muscle movement where the muscle lengthens as it is put under tension.
While the word “contraction” often conjures up an image of a muscle shortening, it is important to note that eccentric contractions involve an extension of the muscle. These types of muscle movements are very common.An eccentric contraction is the motion of an active muscle while it is lengthening under load. Eccentric training is repetitively doing eccentric muscle contractions.There are 2 types of isotonic contractions: concentric and eccentric.5In a concentric contraction, the muscle tension rises to meet the resistance then remains stable as the muscle shortens.
During eccentric contraction, the muscle lengthens as the resistance becomes greater than.Eccentric contractions are lengthening movements of your muscles. During this muscle movement, your muscle fibers are stretched under tension from a force greater than the muscle generates. Unlike.
Isotonic contraction has two subtypes; concentric and eccentric. Concentric contraction is when the muscle length shortens, while eccentric contraction is when the muscle length increases. This article will discuss the mechanism and examples of eccentric muscle contraction.Eccentric muscle action has several unique features compared with its concentric counterpart.
At equal external loads, less muscle activation (based on EMG) occurs and less energy is expended during eccentric muscle action. Many sports injuries are identified as occurring during deceleration, requiring strong eccentric muscle action.An eccentric contraction results in the elongation of a muscle.
Such contractions decelerate the muscle joints (acting as “brakes” to concentric contractions) and can alter the position of the load force. These contractions can be both voluntary and involuntary.In eccentric contraction, the tension generated while isometric is insufficient to overcome the external load on the muscle and the muscle fibers lengthen as they contract.
Rather than working to pull a joint in the direction of the muscle contraction, the muscle acts to decelerate the joint at the end of a movement or otherwise control the repositioning of a load.During an eccentric contraction, your muscle elongates as it contracts because the muscles are producing a tension that is less than the resistance. When you’re lowering your body toward the floor during a pushup, for example, your chest, shoulders and triceps are eccentrically contracting to prevent your body from slamming into the floor.
List of related literature:
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| from Dynamic Alignment Through Imagery | |
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| from Principles of Neuromusculoskeletal Treatment and Management E-Book: A Handbook for Therapists | |
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| from Physiology of Sport and Exercise | |
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| from Chiropractic Technique E-Book | |
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| from Pain Management in Veterinary Practice | |
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| from Orthopaedics for the Physical Therapist Assistant | |
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| from Safety Design for Space Systems | |
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| from Scientific Foundations and Principles of Practice in Musculoskeletal Rehabilitation E-Book | |
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| from Biomechanics of Sport and Exercise | |
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| from Canine Sports Medicine and Rehabilitation |
106 comments
Thank you for explaining and demonstrating the contraction types. This is so helpful! Great explanation.
Most comprehesive yet uncomplicated explanation so far. Thanks a million
very well explained, now I’m ready to kick ass in exercise physiology class haaa
best explanation! I am studying for my AFAA certification and could not understand this concept based on the book text, but I understood it instantly when you explained it. Thank you!
My yoga TTC teacher couldn’t explain the 3 types of contractions. Thanks god I found this! Getting into/out of a pose is concentric or eccentric contraction, and holding a pose is isometric contraction!
Thanks for the video, I have a comment regarding Class 1. i think there was a mistake. you have mentioned two forces in the same directions. you have said clockwise twice. Thanks!
Great explanation. To the point and very clear! Thank you!!
ECI: from > stress to < stress Eccentric (lengthen), Concentric (shorten), Isometric (inert). Is it safe to assume that Mr. Braithwaite means, "the eccentric phase is the most stressful on the PRIME MOVER or agonist muscle"? What about in a compound exercise? What of reciprocal inhibition?
Very helpful and straight to the point without going into too much detail and confusing me, thank you.
what if my biomechnics teacher was something like him, in that case i would have complete attendance. ����
thank yoo for helpful information for lifting and rounding butty which kind of squat do you prefer??
You damn braithwaits are all the same. Arthur Morgan will Rob you criminals, blind!!
Thanks mate from the UK as this will come in handy for revision for my Anatomy & Physiology Exam tomorrow!!!
Wouldn’t you have to exert more force than the load to achieve concentric contraction? If the force is the same as the loadforce it would just be the same as isometric right?
when you say lengthening component of the squat, what muscles are lengthening? why call it eccentric and not concentric.
What about an overhead barbell press? Would the up part be the eccentric?!
Awesome video.. James.. Thanks for uploading.. It will help me on Nasm ��
Another way to define the three types of contractions:
Concentric: Defeat gravity.
Eccentric: Reduce gravity.
Isometric: Neutralize gravity.
So, it doesn’t mater if you are seating, standing, or laying down, gravity always pulls the weight down. The name of your contraction depends on where the weight goes compared against the direction of the gravitational pull.
Glad I found this video, I was so confused. Great explanation!
James, I understand you’re running little low on time. I have had a Syrian Refugee who had a trauma and my request is identify which of three types of exercises would suit trumatic patients
as a medical student (ok im 1st year…) but this made understanding of muscles 1. interesting 2. beneficial to my patients (i hope) thank you so much!!
Boring…, talk with a different voice, not like sleeping one
Beautiful explanation! It’s a great thing to start with isometric movements for beginners and rehabilitated clients.
Very useful video. Understand why my trainer always told me to slow down when I was doing what I thought was the ‘easy’ part of an exercise….the downward element of a push up for instance. Makes sense now. Thanks
I’m confused. my book says that “the tension developed from isometric contraction is often higher than that developed during an isotonic contraction. PLEASE HELP I’m so confused. Also would stress and tension on a muscle be considered the same things? my book is called “serious strength training” second edition”. thank you.
you just don’t know how much you’ve helped me! you are appreciated. thank you
Nursing student here! Thank you for your help! I fully understand this now:)
Thank you! This really helped me because I didn’t understand the difference between isometric and concentric contractions before. Needed to know this for my test tomorrow
Physio therapists are gold. Thank you for choosing and being a phyiotherapist despite the salary. You guys are key to healing more than people realize.
Thanks alot Mr. James. you explained it just plain and simple….i got it perfectly.. i greatly appreciate it.the NASM textbook uses too much fancy words., i have trouble understanding it..
how would the lowering during a squat be the most stressful if the descent is aided by gravity? wouldn’t it be more stressful standing up?
Thanks James your videos are great!! It always helps to teach others to re-enforce your knowledgeI am a PT and how you are explaining this is something I am going to take on board with my clients.
You made it very simple to understand. Thank you very much. In this manner it doesn’t a genius to learn and appreciate anatomy and physiology. You made learners spent less time and not sacrificing the quality of learning in this topic. Again thank you very much.
Hello James. Which one should I use to gain bulk…and which one for definition?
Your video is short, simple, upto the point and easy to understand. Way to go. Make more videos but what about isokinestics? Did I type that right?
hey, isometric static hold is the best training as long as you add tons of weight
there’s 3 muscle fiber types and a 4th that is fast twitch glycalytic
they all recruit sequentially so you stimulate all when you go heavy as they said if you do light it doesn’t matter what speed or how you do it the muscle type level are recruited
they recruit at max when you do insane massive isometric static hold by super cheating and holding the weight in the position where the muscle is being target contracted
I think everyone does it wrong as my weight has went up far faster on everything than when I was moving weight. I honestly think it’s people who are misinformed why people don’t do it. It boost natural test which exceeds test boosters that last working up to one month and far exceeds steroids because steroids boost 300%+ test but after coming off it drops to like -400%. I’ve tested it first hand over 3 years what is best now the whole gym looks at me thinking I do too much weight that they can do if they just copy me considering they are at least 1.5x-4x my scale physical size in actual.
It also jacks up the bone density because the load is far higher. The connective tissues also become more dense considering nutrition and rest is there to rebuild.
Isometric contraction is the most soliciting contraction in terms on intensity (the downside is that it doesn,t activate all of the fibers of the muscle, -unlike eccentric or concentric which u use for the entire range of the joint)
really huge amount of knowledge is imparted through this video
I love all of your videos. You’re a brilliant teacher. You make it so easy to understand Thank you!:)
Great help Ma’am easily described and easy to understand. You just gained a subscriber. ����
You are so preetty I couldn’t take my eye off u seriously ��
I love you, I was so stuck on the levers part during my physics class on biomechanics ❤️ I hope you have videos on fluids and waves too haha
You are amazing! Thank you for helping other people xx
I’m a senior in hs that understood this perfectly after ur explanations thank u good sir
Thank you for this video. It made it much more clear to understand.:)
So isometric is like
Rrrrrrr4rrrrrrrrrrrr
And isotonic be like
Rrrrrrrroooorrrrrr
You kinda eccentered yourself from the initial title on the first half, and that got me confused.
Amazing! The way you demonstrated was really easy to understand! Very appreciated!
is weight lifting an isometric contraction? Can you give some more examples for isometric contraction…
Stretching your calves on the window sill works really well too!
Well done Paula. Good job. Hopefully I can find other videos you have done on body movement eg eccentric / concentric movement during the lunge
I don’t think the load necessarily has to change in isometric contraction.
This video is still helping people six years later, just wanted you to know.
If you found this helpful, head on over to AthleneX. He puts the science back in strength explaining how and why you should workout. He did a video on this, which led me here
I’m studying to become a physiotherapist your video helped me a lot! Thank you ✌✨
Thank you for being the teacher most people don’t have in their med schools. May god bless you. Please keep up the good work!
That is about the clearest I’ve heard that explained in two minutes! You’re awesome! Thank you!
This explains everything i need to know about the concept. Thank you!
1:14 apne bola muslces contract hoti hai Uski Length CHANGE NAHI hoti.
Fir apne bola Muscle ki Length bhi change HOGI? ��������
It’s easy to think isometric contraction in skeletal muscle. But what about cardiac muscle?
I find it difficult to understand isometric contraction in ventricles (one of the cause for first heart sound).
Thank you Paula for a very clear and simple explanation. It is true, as you say, that in yoga all the asanas (poses) are physically static (isometric). However, the isotonic principles are used in yoga in the many transitions between postures.
Brilliant! Quite a didactic and easy to follow explanation. Cheers!
I wasn’t looking for this topic, but it’s interesting. Good to know c:
Ok, well put together, but i have a question, what is a pliometric contraction then?
I mean i know what it is, but in what group does it fall in? Isotonic,isometric or isokinetic? it’s obvious that it’s not isokinetic or isometsic, i’m not quite sure if it falls into the isotonic group? or is it just on its own? or is a pliometric contraction a variant of the isometric contraction group? isomeans “equal” but pliomeans “more”? I’m done for researching for today, but my assumption is gonna be that the pliometric is a group for itself. i would love some feedback from smart people!
Simple principles explained in a simple (easy to understand) manner. Brilliant. Thanks.
thanx for explain of isometric in very simple way to understand
When it comes to the human body, your in the TOP TEN here on the world wide web!!!
Kudos!
Thank you so much sir…..your videos make all concepts clear��������thanks a lot������
Thanks sir. A question:
In isotonic (eccentric) contraction the tension is even greater than isotonic (concentric) contraction but in graph of tension/time it is shown that in muscle relaxation (eccentric contraction) the tension is decreasing,?
Very clear explanation. Preparing my PT Exams and this video helps me to understand the difference. Thanks.
Load force should be equal to muscle force for an isometric contraction, not greater
I absolutely love your videos! You have a natural talent in teaching. I have a question, forgive me if it’s a stupid question. You said that in an isometric contraction the load force is more than the muscle force. Wouldn’t that mean that the muscle force wouldn’t be able to hold the degree of flexion (in your example of a bicep curl) rather than being able to hold it at the same degree? Why isn’t the load force equal to the muscle force in an isometric contraction?
I absolutely love your videos! You have a natural talent in teaching. I have a question, forgive me if it’s a stupid question. You said that in an isometric contraction the load force is more than the muscle force. Wouldn’t that mean that the muscle force wouldn’t be able to hold the degree of flexion (in your example of a bicep curl) rather than being able to hold it at the same degree? Why isn’t the load force equal to the muscle force in an isometric contraction?
Thank you for the video. However, many biomechanic textbooks refer to a moment arm. Are they referring to the Resistance Arm or the Force Arm? My guess would be the Force Arm?
You say YOU appreciate us watching your videos but you’re highhandedly doing a much much much better job than a combined 8 of my “professors” & I’m not even exaggerating. I’ve stopped attending lectures and I’m mostly dependent on you, thank you so much for your hard work & effort.
for the first time in my life i am actually enjoying studying, thanks man.
Hi I’m basically a new subscriber and currently a premed student. We are dealing with muscle physiology rn and given just a 1 line definition of these stuff. In the lower classes we were taught Muscle contraction is basically the shortening of the sarcomeres of the muscle fibre. Now its all confusing what is actual muscle contraction and relaxation?
Every video deserves at least 100, if not 1000 times more views.
yeee woww you are awesome! Everything what you say makes sense.I have leraned so much!
I just watch your vids on my free time! Your vids are so well prepared, i enjoy learning from them. Thank you Ninja!!!
expecting videos from microbiology…general basic principles of microbiology etc etc….please do consider this buddy
I know everyone else has already said it, but this video was very helpful, and one of the best, most concise explanations of the concept. It really cleared things up for me. Thank you!
Thank you so much. This is so helpful. I should just send you my tuition because I learned so much watching your videos compare to what I learned in class. Continue to do what you do. You’re awesome!!!!
Thank you! that was easy learning and your smile made it even more easier ��������
So isometrics would be good for sprained ankle recovery too?
thanks for your videos!!! it helped me a lot! but i have a question about isometric and isotonic contractions.
is it possible that there is isotonic and isometric contractions in one movement?
for example: you want to lift a weight of 10 kilos from the floor. id you pick it up its isotonic contraction, but when you hold it in your arms, is it still isotonic? or is it then isometric?
Hi great video on anatomy. I have included this in my website article.
https://pinoyathletics.info/plyometrics-exercises/
How could exercise with that weight izotonic if the force is fluctuating?
I am so impressed by the explanation and the demonstration.
Does gravity play a part in differentiating between isotonic and isokinetic? do dynabands allow for isokinetic movement or would that still be isotonic?
thank uuuuu i get it now. what would i have done before youtube?
Hi Sarah, thank you for sharing this video. I would love to get in contact with you about sharing this video with our trainers.
Thanks James.
Imagine that since 4yeas and I am not following the right routine. But now that I found you, I am going to ask you give me a vid on rehab for cervical spondylitis that causes for me vertigo and headaches
Thank you! Finally I understood koncentric and wxcentric both goes under isotonic. Great videos!
so precise and easy to understand, bough a book of 240 bucks and that cant expain how wasily you did it.
Great and awesome video;saved me time of studying…it made muscle comtaction so simple…thanks and a big thumb up
4 Biomechanics lectures didn’t explain the concept as well as this 2 minute video. Thanks!:)
The tension does not stay the same during a so-called “isotonic” contraction. Both the muscular torque and the resistance torque change as the angles change and so the tension changes as well. Isotonic is a term that we should phase out of our vocabulary.
Good video but the job of the biceps brachii is flexion and supination of the elbow, the prime mover is brachialis.
Great video explaining the different types of muscle contractions.
So my professor who has a doctorate could not explain this short and concisely… something so damn simple. Proof that not everyone is gifted to teach even with years of experience and a Phd added to their name::eye roll::
Thank you for uploading this:)
The way you explained that was quite practical. I like it.
paid like $60 for this dumbass college book that can’t even thoroughly explain it this well.
This is so helpful! Best explanation ever. Thank you so much ��
Hello peeps. I love doing exercises it makes me feel lighter and less stressed. I keep thinking about fitness and wellness that I am beginning to want to have a career out of it but i don’t know where to start, and perhaps do business in this field in the future.
Thank you sir.Your lecture are great and very simple to understand. You make things simple. Again thank you from bottom of my heart
All well sir
Just a heads up it’s lengthening not longthening