Muscle Contraction Explained | Concentric, Isometric, & Eccentric
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- Опубліковано 1 сер 2024
- Exclusive strength and sport science content: / drjacobgoodin
Muscle doesn't just "flex", it contracts in three distinct ways! In this video I will explain muscle contraction at the whole muscle and myofibrillar levels. In short, sarcomeres shorten during a concentric contraction, lengthen under tension during eccentric contraction, and maintain tension without changing length during isometric contraction. This lecture is part of a free, 25-video series covering every facet of structural anatomy. Don’t just memorize human anatomy, master it: bit.ly/38MuIHg
TIME-STAMPS
00:00 - Intro
00:53 - Concentric
02:55 - Eccentric
03:55 - Isometric
05:15 - Recap
06:25 - Where to Head Next
#kinesiologyconcepts #activeandpassiveinsufficiency #DrGoodin
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Hey there kinesiology friends! Thanks for checking out this video-it’s part of a playlist that covers every major region of the body: including bony landmarks, joint movements, and muscle actions. You can find that here: bit.ly/38MuIHg
Additionally, check out my Kinesiology Concepts playlist where I spend 5-10 minutes simplifying important kinesiology concepts: bit.ly/3mgKy1K
Or stop by my channel for complete teaching series on strength and conditioning, statistics in kinesiology, and sport science: bit.ly/2Rlg5kQ
Have a great day and remember to move well, live well, and teach others to do the same!
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Structural Kinesiology - bit.ly/38MuIHg
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At-Home Follow-Along Workouts - bit.ly/3k8OQqc
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Dr. Jacob Goodin is a professor of kinesiology at Point Loma Nazarene University (PLNU), and holds a PhD in Sport Physiology and Performance from East Tennessee State University. He has over a decade of experience as a strength and conditioning coach and sport scientist from the high school to NCAA Division I levels. In addition to his role as a professor and research mentor, Dr. Goodin directs the Athlete Monitoring Initiative at PLNU, which provides testing and monitoring services to over 200 athletes yearly as well as research opportunities for kinesiology students.
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This was such a great refresher! The visuals are super helpful as well as the explanations. Going back to the basics is always great!
The visuals are super helpful, thank you. The repetition of the terms in the video lectures and in class and how much they overlap makes it harder to forget things, which I appreciate.
Loved the simplicity of this review, such a good refresher! I loved your point about gravity's role in eccentric contractions and the way you explained what was going on at the sarcomere level!
I really appreciate how this video went over all three of these really clearly and made it easier to understand.
I have learned about the various muscle contractions before, but this was a great refresher. I also really enjoyed seeing the visuals you included in teh lecture. As a visual learner I always appreciate the use of visual aids along with words and definitions!
Thank you for the helpful video! I really liked how you went through the bicep curl and the different contractions. Being able to do it myself alongside the lecture really helped my learning!
I really appreciate this video because it explained all three very clearly. I would always get stuck when seeing these words on an assignment or quiz, and when I would 'research' them, I never got a clear enough answer! I'm glad I can come back to this video!
This was a great refresher on the different muscle contractions that occur! Thank you
Great use of the visuals to show the differences in tension and give a breakdown of the sarcomere and z disks actions as well as the myosin and actin cross bridges.
This was a great summary of concentric, isometric, and eccentric muscles. It was so helpful!
This was a great review of muscle contraction, and the visuals were also super helpful to compare concentric, eccentric, and isometric.
This is was a good review! The pictures helped me understand the different types of contractions!
I like that you mentioned the bicep being the agonist in the concentric portion of the curl, and the antagonist in the eccentric portion of the curl. This really helped me to put the concepts of biomechanics and muscle contraction together!
Loved the deep dive on the 3 different types of contractions!
Thanks for the recap Dr. Goodin, always appreciate the examples you provide!
Great refresher and explanation of the the three muscle contractions.
This is definitely something we've gone over in many of our other KIN classes although a welcome refresher
Really great explanation of the 3 types of muscle contractions. I liked how you added in what's happening at the sarcomeres for each movement!
I appreciate your artistic skills! This was a great refresher video and the explanation of resistance and muscle force added a helpful layer to the content!
I really looked for this thorough explanation, thanks! now i finally understand the concept of different contractions.
Great breakdown of concentric, eccentric, and isometric muscle contractions! The explanation using the example of the bicep curl makes it easy to understand. I appreciate how you clarified the mechanics behind each type of contraction, especially highlighting the role of torque.
The diagram and drawing you created to differential between isometric, concentric, and eccentric contraction was very helpful and gave me a clear understanding for each one!
This was a great and simple video about muscle contractions! From previous anatomy and kinese courses, these three types of muscle contractions have been engrained into my head; however, I liked how you touched on the resistive and muscular forces because those seem to not be talked about as much.
man I didn't know I'd miss your intro so much. I took it for granted lol. you are also a really good drawer! Speaking of that really helped understand better and especially for my notes it helps reminder me of what the notes are for
I recall learning these muscle actions in other classes, but this was a great refresher on the material.
This was a great review of the muscle actions and this video also helped me understand what is occurring in the sarcomeres during an isometric contraction.
This video was a great recap in going through the explanation of concentric, eccentric & isometric muscle contraction!
Love the drawings of the joints! It helped me get a better visualization of the different types of muscle actions.
Great recap of concentric, eccentric, and isometric contractions. I also liked how you included sarcomeres and their role in muscle contractions
I really like how you explained each one. I knew the main idea between the three but I learned what it meant for the resistive and muscle torques to be different. The arrows did help too!
Awesome explanation for the "bro science" way of thinking how muscles work. Very helpful!
These illustrations were very simple yet effective at demonstrating the different types of muscle contractions. Even though these types of movements are a bit more simple to understand than others, these types of contractions are very vital in understanding when it comes to training (weight lifting).
Thank you for clarifying the three different contractions and how the different forces impact each one.
I really liked that you drew out the muscle and bone to give us a visual aid of the 3 types of contractions. Thank you!
Thank you for explaining what contraction is making the muscle the agonist and antagonist! Also great drawings really easy to identify what was happening!
This video was great to review the different types of muscle contractions! Even after taking multiple classes using these terms, it's always nice to come back to basics :) the drawings of the joints are helpful in visualizing!
This was a good review of the different muscle contractions. I appreciate the drawings!
I already had a knowledge of the types of contraction but it was great to review them!
Thank you for the review Dr. Goodin. All three types of muscle contractions are very important for gaining muscle. I like to focus on eccentric after a bicep curl because i can feel the muscle tension the most.
Going over the main muscle contractions was super helpful for me. Your diagram drawings are definitely better than anything that I could have made.
Honestly a great refresher video for the terms as it has been a whole summer where I didn't use any of these terms at all.
Getting a refresher on muscle contractions is very helpful and builds a base for what is to come for future lessons.
The muscle contraction is one of the most fascinating things to me! Z discs are still difficult to understand but this video helped me a bit in visualizing the "flex" of our arms! Ive also noticed how much more my muscles, specifically in my arms have been reacting and growing to eccentric movements paired with isometric holds!
This is a good review of muscle contractions! The drawings were very helpful as I am a visual learner. Thanks!
I really liked how we can apply the concentric, eccentric, and isometric positions with the bicep curl! Thank you for drawing the diagrams they were really helpful.
This video was helpful refreshing the different contractions. I appreciated noting that the muscles are agonists in concentric and antagonists in eccentric, alongside the resistive and muscle torque are equal in isometric. Going through the bicep curl was a lovely example, thank you!
since I am in biomechanics right now, this video is very helpful and goes hand-in-hand with the other class. Also a great refresher! Thank you, Dr. Goodin!
The drawings were really beneficial in helping me understand the different movements in each type of contraction.
This was a great review for me. Thanks!
I was confused about concentric and eccentric contractions and the lengthening and shortening for so long, after first learning it, so its always good to get a refresher.
Great drawings! During tests, I am always moving my arms around trying to figure out movements (eccentric, concentric, isometric). Great explanation of all of these!
Being able to do these movements on myself is very helpful and makes more sense. It's so interesting to know how muscles act.
thank you for the reminder of what are the 3 type of contractions for our muscle !
The drawings were very helpful for me to visualize what was happening during each type of muscle contraction.
Although I have already learned much of this information, this video was good review on concentric, eccentric, and isometric contractions.
Great video! I love learning about these muscle actions because I can immediately think of examples when I am working out and how my muscle feels while doing the exercise. At least for me, the biceps are a great example that never fails when I forget the movements during a test!
I found this to be good review of the 3 different types of muscle contractions and I liked how you explained what is happening when we are "flexing" our muscles
Always found it hard to explain what an eccentric contraction was but this video gave a good simplified definition.
I think this video is perfect when trying to explain to someone what the different types of contractions are for the first time. I thought it was very simple and very well produced.
This was a good review of Biomechanics during my junior year! specifically the lengthening and shortening of the muscles.
Aww missed the sick intro on this video but it was a nice surprise seeing it as an outro instead! Miss that ocean view.
Thanks for drawing out the different kinds of contractions. Your little drawings were well done and really helped get the point across visually. I am still confused about torque but hopefully I'll get the hang of it!
Something so simple can sometimes still create confusion. This was an amazing way to refresh that knowledge
The pictures were really useful to help visualize! Good work on those! I have tried and failed with computer drawing.
This video helped me understand how to relate force to muscle movements!
Great explanation of the different movements using a biceps curl. It can be hard to conceptualize these things using scholarly terms, but your explanations really help!
concentric = shortening
eccentric = lengthening
isometric has equal muscle force and resistive force
won't forget these three muscle contractions especially with the live drawings you gave, very applicable with many of my classes right now
This was a good review of how in a concentric contraction the muscle shortens, in an eccentric contraction the muscle lengthens and isometric in where the muscle doesn't change lengths.
The force diagrams were great for helping me nail this concept. I'll start training to rip the granite countertop off the table!
Super helpful and great drawings! You should make some art tutorials alongside these anatomical reviews!
THis was a nice reveiw from structural kin and biomechanics. Its hard to remember sometimes whats essentric and concentric so this is a good reminder.
Visually seeing the drawings really helped to better comprehend the differences between concentric, isometric, and eccentric contractions.
Dr. Goodin, what can't you do?! Vast amounts of information, solid video production, and you can draw!?
The drawings helped a lot!
Dang Doc! You're such an artist!
I found the comparison of gravity to the force of the muscle very interesting, and when you think about it makes a lot of sense
I always connect eccentric contractions with slow lowering of the arm in bicep curls and it helps me remember.
Got it! These were pretty easy to understand as well as to remember...I hope! Good stuff though.
I remember these topics from anatomy! I think that the concept of resistive and muscular forces are interesting.
Dr. Goodin has got a strong vertical. I am changing my exercise plan to increase my vertical jump because of the outro of these videos. I have come to terms that I will never be as musclebound, but maybe I can have that vertical.
Took me a few years to get there but yes it's very trainable Josh! Also, you might be surprised at what 3-4 years of training and good diet can do for your muscularity. Remember that I was once a long distance runner...
Thank you for the video! I read somewhere that the swelling of the muscles had more to do with the affluence of blood to the muscle rather than a "bunching up" of the z lines. I'm not sure how the bunching up makes sense if the overall muscle lenght stays the same? If some fibers relax and some shorten how is it that the overall result is swelling? What could I read to further my understanding of this?
I have a question. If your lying on the ground in a prone position and arms arm palm face up, is the bicep now in concentric position because gravity is overcoming force on muscle?
When training, is it better to train the eccentric part for optimal muscle growth?
Using your example of the kitchen counter, would doing an isometric hold with a dumbbell be the same? The kitchen counter wouldn't move, but the dumbbell could be moved, were just holding it in place
Could you elaborate on what you said from 5:02-5:09?
Sir could i just clarify as i am having a debate with a UK exam board - for a Bicep curl on the way down - the agonist is the tricep, and the bicep would be the antagonist, or is the Bicep the agonist (even though it is lengthening)for the downward phase of a bicep curl.
That's correct Eugene. Because the biceps is slowing the rate of extension, it is considered an antagonist. Good luck in your debate!
Quick question, how effective would eccentric bench press be for escaping a plateau? I remember doing these in high school where you’d overload the bar to where you could only control the weight down but needed a spotter to help on the way up.
Very effective if your limiting factor is eccentric control, or if eccentric training causes a new stimulus for growth
I had not known that the proper terminology is eccentric and concentric "muscle action" rather than simply using "contraction" for each as contraction mainly refers to concentric movements.
Tq sir
I find it crazy that sarcomeres can be changing length while the muscle is contracting isometrically however the muscle itself as a whole is not changing length.
I'm gonna imagine z-disks being pushed together every time I flex now😂.
6:00
Cool how technology works w/ the ipad
during concentric contractions gravity has less of a torque than the muscle does
Remember that torque is rotational force, so we would speak of joint torques, but muscle and gravity forces
Next time I flex ill be sure to thank my z discs.
my least favorite type of workout is isometric squats with that pause at the bottom
So instead of complimenting someones muscles when they flex, can we say nice conncentric muscle contraction bro?
EXACTLY
Or: "Sick cross-sectional area my dude!"
Concenctric exercises = fun - Eccentric exercises/training = not so fun - Max intent isometric training = ABSOLUTELY MISERABLE
This was such a great refresher! The visuals are super helpful as well as the explanations. Going back to the basics is always great!