Muscle Contraction Explained | Concentric, Isometric, & Eccentric

[@vanessaviramontesPLNU]

Dr. Goodin, what an amazing refresh on the muscle actions of the body. I was reminded that eccentric is not simply just the "downward" motion of a concentric contraction, rather the control movement against gravity as a muscle is eccentrically contracting and controlling the weight. the muscle is actually becoming the antagonist resisting the force of gravity and the tricep extends the arm ( in the case of a bicep curl).

[@NatalieSeaholm]

This video did a really good job of refreshing my memory on the different types of contractions. I really appreciated the visuals for the eccentric, concentric, and isometric contractions so that I was able to compare it to our physical body.

[@MatthewDuPrey325]

I really appreciate how this video went over all three of these really clearly and made it easier to understand.

[@ClaireStone-jq4wg]

This was a helpful and concise refresher on the different muscle actions. When looking at isometric contraction I forget that there is more to it than just holding a position and that there are other ways to train isometrically.

[@IvyBartlett]

I appreciate you mentioning how the bicep acts as the agonist during the concentric phase of the curl and as the antagonist during the eccentric phase. This really helped me connect the concepts of biomechanics and muscle contraction!

[@karatemplin5506]

I love being able to continuously use this video as a refresher on the types of muscle contractions.

[@maryerickson4093]

I really appreciate the illustrations you drew when explaining eccentric vs concentric contractions. They were very helpful!

[@jakegellatly8261]

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!

[@audreyoates3242]

This was such a great refresher! The visuals are super helpful as well as the explanations. Going back to the basics is always great!

[@ameliabrock]

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.

[@miadenava585]

This video was a great refresher on different types of contractions. It is important to understand the differences for training designs because each of them plays different roles in muscle control and can affect strength development.

[@dannicazambrano]

These were great illustrations of muscle contraction! I appreciate the explanation about there being equal torque in isometric contraction.

[@Moniiiqueee824]

Muscle contractions can be somewhat confusing to grasp. This video is always helpful when I'm trying to sort out the details. The visuals and your drawings really clarified things for me. Thanks, Dr.Goodin!

[@torilucht5871]

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!

[@moirabryson5042]

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!

[@ameliabrock]

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.

[@wyattcarlson7504]

Going over the main muscle contractions was super helpful for me. Your diagram drawings are definitely better than anything that I could have made.

[@davidhaynes3269]

The pictures were really useful to help visualize! Good work on those! I have tried and failed with computer drawing.

[@madelinehernandez8838]

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!

[@DerekLinck]

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.

[@macynunez4455]

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!

[@VirAquinoPLNU]

I really enjoyed learning about the different types of muscle contraction. I find myself saying these terms during my workouts a lot to ensure I am doing the right movement

[@emilywalker9462]

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!

[@devynpryor8228]

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.

[@brysonhashimoto2878]

Getting a refresher on muscle contractions is very helpful and builds a base for what is to come for future lessons.

[@DevanneyBoyd]

This was a great review of muscle contraction, and the visuals were also super helpful to compare concentric, eccentric, and isometric.

[@emilywalker9462]

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!

[@luciavaldez2601]

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!

[@sarahcox-barden]

I love the littel drawings in this video! I was definently moving around and trying to find actions that fit all of these movements!

[@AylethLizarraga]

Something so simple can sometimes still create confusion. This was an amazing way to refresh that knowledge

[@zoiezantua7002]

Thank you for clarifying the three different contractions and how the different forces impact each one.

[@ChynnaKifer]

Thank you for explaining what contraction is making the muscle the agonist and antagonist! Also great drawings really easy to identify what was happening!

[@mollytucker567]

I remember learning about the different types of muscle actions in structural kinesiology and having a difficult time truly understanding. However, like in many other cases, learning about them again helped me feel like I actually really understand this time.

[@saeternj]

Loved the deep dive on the 3 different types of contractions!

[@thelmasepulveda4481]

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.

[@evakoutelieris1633]

This was a great refresher on the different muscle contractions that occur! Thank you

[@lexireynish5892]

This was a great summary of concentric, isometric, and eccentric muscles. It was so helpful!

[@JonathanKozasky]

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!

[@ellieconiaris9073]

helpful and detailed review of different contraction types and their characteristics

[@ryanharris8481]

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!

[@dimitricarrion6145]

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

[@joyshang5670]

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.

[@evaozimec]

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!

[@kennyvogan5673]

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.

[@matthewbeecher2592]

This was a great video on the different types of contractions. I think its so cool how sarcomeres work in order to create bodily movement. I'm also quite impressed with your ability to draw on a computer, I find it impossible.

[@madelinejewelnebril2871]

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.

[@caleighgarcia7792]

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.

[@kieranmccarty4050]

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!

[@morganrolleri9198]

Great refresher and explanation of the the three muscle contractions.

[@Revitalrik]

I really looked for this thorough explanation, thanks! now i finally understand the concept of different contractions.

[@aribhalla9820]

I recall learning these muscle actions in other classes, but this was a great refresher on the material.

[@jamarmack9626]

The drawings were really beneficial in helping me understand the different movements in each type of contraction.

[@BrianaReynoso]

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!

[@isabellecousineau302]

Love the drawings of the joints! It helped me get a better visualization of the different types of muscle actions.

[@jupshaw]

Awesome explanation for the "bro science" way of thinking how muscles work. Very helpful!

[@aliciahernandez00233]

Dr. Goodin thank you for these explanations on muscle contractions. During eccentric contraction I forgot that the force of gravity played a role in the muscle lengthening.

[@myawilliams8357]

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

[@cjbuenviaje]

This is was a good review! The pictures helped me understand the different types of contractions!

[@rozalynnlarson8835]

Great recap of concentric, eccentric, and isometric contractions. I also liked how you included sarcomeres and their role in muscle contractions

[@Chasebowen23]

Great refresher of each movement!

[@celinegriffin3244]

This video was a great recap in going through the explanation of concentric, eccentric & isometric muscle contraction!

[@milandiklic1080]

thank you for the reminder of what are the 3 type of contractions for our muscle !

[@cjbuenviaje]

This is a good review of muscle contractions! The drawings were very helpful as I am a visual learner. Thanks!

[@matthewwadley4348]

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.

[@julianasum8481]

Although I have already learned much of this information, this video was good review on concentric, eccentric, and isometric contractions.

[@emmasanchez5975]

Being able to do these movements on myself is very helpful and makes more sense. It's so interesting to know how muscles act.

[@braedenmoore3743]

The drawings were very helpful for me to visualize what was happening during each type of muscle contraction.

[@MaryErickson335]

This was a great review from what I learned in anatomy and also biomechanics!

[@melanieweirich8482]

This is definitely something we've gone over in many of our other KIN classes although a welcome refresher

[@wyattsimms4472]

I already had a knowledge of the types of contraction but it was great to review them!

[@kelli-lynroche8446]

This was a good review of the different muscle contractions. I appreciate the drawings!

[@oliviadyck510]

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!

[@jadenrea1109]

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).

[@abartsch0022]

A great reminder of the three muscle contractions and I love how simple you made it with the example of the elbow. And I love how you encourage us to practice this on ourselves since you can learn these muscle contractions with muscle memory. (see what I did there.)

[@jackmalone5800]

Always found it hard to explain what an eccentric contraction was but this video gave a good simplified definition.

[@everoche3754]

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!

[@tianguyen3897]

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.

[@thomaskinzler]

I was intrigued by the piece about sarcomeres changing lengths as different ones took over because I feel like the idea of rotating fibers to sustain contraction was talked about briefly in my Ex Phys class but I hadn't necessarily had it engrained in my mind that this is what is occurring during isometric contraction.

[@cutetwinkie47]

Thanks for the recap Dr. Goodin, always appreciate the examples you provide!

[@DerekLinck]

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!

[@cameransherwood5157]

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!

[@NoelleDarquea]

Every semester, the Kin department talks about muscle contraction but it was another great, short but sweet refresher

[@jakegonzales1367]

This was a good review of Biomechanics during my junior year! specifically the lengthening and shortening of the muscles.

[@hannahb872]

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

[@makennakaczmarczyk7563]

This video helped me understand how to relate force to muscle movements!

[@Adam.gates_]

The force diagrams were great for helping me nail this concept. I'll start training to rip the granite countertop off the table!

[@jakegonzales1367]

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.

[@willhopkins4197]

Super helpful and great drawings! You should make some art tutorials alongside these anatomical reviews!

[@eugenesmith5348]

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.

[@DrJacobGoodin]

That's correct Eugene. Because the biceps is slowing the rate of extension, it is considered an antagonist. Good luck in your debate!

[@karatemplin]

I found the drawings to be very helpful. I wish we could see these different contractions happening at the molecular level!

[@avajgallo]

This was a great review for me. Thanks!

[@alannabergherm8046]

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!

[@joshcombs123]

I always connect eccentric contractions with slow lowering of the arm in bicep curls and it helps me remember.

[@SuperTroyAustin]

Dang Doc! You're such an artist!

[@TRamos-pl6oo]

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

[@clairemasterson6031]

Dr. Goodin, what can't you do?! Vast amounts of information, solid video production, and you can draw!?

[@joshuawada8783]

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.

[@DrJacobGoodin]

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...

[@charmenatchison854]

Got it! These were pretty easy to understand as well as to remember...I hope! Good stuff though.

[@emilydonahue8216]

The drawings helped a lot!

[@laurenwahl9715]

I think its important to remember that in isometric the muscle and resistance force will be the same, and this video stressed that properly!