Still a gem of a video 4 years later man

THANK YOU so much @Catalyst University. Ive been sat here for 2.5 hours trying to understand this concept from my uni lecture recording, playing the same section on repeat and getting frustrated. Had it not been for you my brain would still be stuck isometrically trying to understand! LOL

Thank you very much I was stack at this stage on my online course trying to understand this concept but you put it clearly 👍

Thank you so much for uploaded this video. This is very useful.

That was well explained, thank you!

Thank you! I had to watch 4 videos to get to yours to explain it with common sense.

Amazing thank you, I also imagined the rubber pull ! It helps a lot to picture it

Thank you very much

Thank you !! such a good explanation

Thank you! thank you! Thank you!

dude i have been trying to understand these graphs since we started learning about muscle mechanics and i finally came across this video and i feel stupid now because the concept is so easy to understand. thank you for explaining this so clearly, this helped me a lot.

@hiral4734

3 жыл бұрын

Me tooo

@arslanbajwa7448

Жыл бұрын

Mujy smj nahi Ayi kindly mujy BHI Thora SA concept dy den in urdu

@skiesraha1

Жыл бұрын

same here! this made it so much simpler to understand than the books do!

Thank you!

i could not like this video because i loved it! im an exercise science student of Trinidad and Tobago

Thank you

How would each of the following affect the force-velocity relationship: a) An increase in muscle fiber cross-sectional area with training; b) a reduction in myosin ATPase activity

Excellent explanation and visualization! And kudos for knowing how to pronounce _eccentric._

Thanx man!!

Great explanation! Thanks for making this! - Pshysiotherapy student from *Belgium*

@CatalystUniversity

4 жыл бұрын

Thank you! I'm actually applying for physiotherapy school soon. Best of luck to you in Belgium.

Great Job ! Good video

Just aced my exercise Phys midterm. God bless you

@bskulldragon100

4 жыл бұрын

YOOOO KINE GANG I MISS YOU😢

Omfg thanku!🎉

Also the position matters: the amount of actin-myosin overlap and leverage with joint.

So is this why it is recommended to do slower eccentric and faster concentric contractions ?

easy to understand but if you skip to the last minute of the video its an extremely concise summary of the entire video.

Thank you so much it really helped me with my exam!

@CatalystUniversity

5 жыл бұрын

Very glad this was able to help you, Ernestine!

@ernestinegerry6466

5 жыл бұрын

Catalyst University 😆

Is Y-axis the resistance or muscle tension ?

Does it have a relationship with gravity?

How do u apply this to jumping

THANK YOU! I have been trying to understand this concept and couldn't. But the way you explain it, and break it down is perfect and makes it so easy to understand!

That’s great! I have a question so now when it comes to training with heavy weights On concentric you’re basically gonna lift the weight slowly so you’re muscle going under tension for long period On the other hand I think now that when the weight is high the dumbbell will go down so quickly so I have to move the dumbbell slowly down to get that tension and don’t leave the high force pull my arm down according to the equation Is it right?

@dion8021

5 ай бұрын

You don’t want to move it too slow on the concentric, force velocity relationship won’t apply the same if you’re purposely lowering the velocity. So move it fast but controlled

Back in my gym days I was always taught to do the eccentric phase of the exercise half as fast as (twice more slowly than) the concentric phase, as the eccentric phase is better for hypertrophy. Is this true? And what's the physiological explanation for it? Then...why not just train eccentrically only. What's the purpose of concentric? To make sure you use all of your myosin heads or something?

@CatalystUniversity

5 жыл бұрын

You still get both strength and hypertrophy benefits from both concentric and eccentric. I recently read a paper about the reason for the increased force due to prior active stretching of the muscle. The paper basically said that the mechanism is not completely understood, but it is known that this is a property of individual sarcomeres. I should probably make a video on that!

@Biomeducated

5 жыл бұрын

@@CatalystUniversity by active stretching you mean PNF? Could you share a link to the article, please? And yes, good idea about the video! ;)

If fast twitch muscles are quick and powerful and are used for generating greater forces how is a high muscle contraction velocity considered to be less forceful according to the graph if fast twitch muscles contract quickly with greater force than slow twitch muscles? If you are attempting to lift something heavy and are exerting maximal force against the object wouldn't your fast twitch muscles be engaged meaning that they would be contracting quickly with a lot of force?

@dion8021

5 ай бұрын

Because as your concentric veocity decreases, high threshold motor units are activated, which means you’re recruiting more muscle fibers and therefore capable of producing more force

Found the video very helpful but still found myself stuck with one doubt. Can you please just brief me how to do the eccentric phase in any exercise Slow or fast?

@dion8021

5 ай бұрын

For most exercises 3 seconds will be adequate. Don’t wanna go fast on the eccentric, you want to control it as much as you can

load-velocity relationship?

@CatalystUniversity

4 жыл бұрын

Yes, this is the same thing as load-velocity relationship since the force required by the muscle is related to the load it is lifting.

Why does the lengthening velocity induce an increase in more force?

@CatalystUniversity

4 жыл бұрын

Take bicep curls for example. When you lower the weight down (biceps in eccentric phase), more weight in your hands (i.e., the dumbbell) causes greater rotational acceleration downward due to increased torque.

@adamaguirre2265

4 жыл бұрын

@@CatalystUniversity how about in terms of muscular tension between crossbridge interactions? (during eccentric actions)

@CatalystUniversity

4 жыл бұрын

@@adamaguirre2265 I recently read a research paper over this. Unfortunately, I don't remember the exact paper. However, it said that while the process was not understood completely at the sarcomeric level, there is an increased force in concentric contraction following an active stretch of the muscle, which appeared to be an intrinsic property of the sarcomere. Addressing this question, I would guess that there is possibly less resistance to stretch of the sarcomere (eccentric) with more resistance to active compression of the sarcomere (concentric). But to be honest, I'm not sure; this is just a guess.

@adamaguirre2265

4 жыл бұрын

@@CatalystUniversity I agree, its a tough concept to understand. Concentric actions are well understood at the whole muscle and sarcomere level, but less is understood about the force development during eccentric actions at the sarcomere level. I have read articles that say things like the crossbridges are attached will bring stretched, which can lead to disruption of the sarcomere z-discs. Also, some mention the elastic protein titin and its contribution to passive tension. But have yet to find anything that discusses crossbridge kinetics during eccentric actions. Thanks !

@flampard1111

4 жыл бұрын

@@adamaguirre2265 It is all to do with Titin acting as a winding filament (winding filament theory). Through muscle activation titin becomes stiffer and when the sarcomere is stretched it produces massive amounts of elastic energy that is used for sarcomere recoil and increased tensions.

How could you have a velocity of absolute zero and be generating force?

@dion8021

5 ай бұрын

Because the arm was at a 90 degree angle, still holding a dumbbell

You didn't tell what's the reason behind this behaviour..

10 minutes is a bit long for explaining a graph, but it was a good video nonetheless. Everyone who knows how to read graphs: Watch at 1,5x since he explains it for people not so versed with graphs (which is nice)

U started to stutter while saying the important point 🙄🙄🙄

Thank you !

@CatalystUniversity

4 жыл бұрын

Glad this helped you!