Sarcomere length-tension relationship | Circulatory system physiology | NCLEX-RN | Khan Academy

Find out why the length of a sarcomere (in diastole) affects the amount of force that it can generate (in systole), and how that would look on a graph. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai.
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Oh my god, thank you so much! I was so confused about this before, and now I don't know why I was even confused in the first place. Thanks! :)

[@funnnkyk1d]

I've been struggling with this topic in the past few months . I never fully understood this sentence " overlapping of actin = less force of contraction= less tension ) . But now,everyting is so clear ! I made all the drowings that u made. ty so much

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literally I have an exam tomorrow about muscle physiology and this video saved me you nailed it i wonder why my professor never explain it this way now after this video it all makes sense thank you as hell

[@danielswenson9972]

This video was such a huge help! I'm studying for my personal training certification and I didn't understand this concept as taught by our book, but this video explains it perfect!!

[@fgorn]

Is this the basic principle as to why we get tired holding a rock in the same place even though no work is actually done? The sarcomere gets stretched and this leads to space for contraction, utilising ATP, and keeping the rock in place, at the expense of more ATP. Is this right?

[@claudeericsoncoronado1597]

Now i get the biphasic relationship between length and tension. Thank you!!!

[@jennifero5263]

So in summary what he’s saying is tension increases as sarcomere length decreases right?

[@maikatay]

Very Very helpful video. You made it so easy to understand the two relationship:) Thanks!

[@kodkodvodka]

THE AMOUNT OF ACTIN AND MYOSIN FILAMENT OVERLAP DETERMINES TENSION DEVELOPED BY THE CONTRACTING MUSCLE Guyton

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I didn't understand this concept until now! Thanks!

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Wow very nice explanation

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[@collidoskope]

This was a perfect video and explanation of the length-tension relationship. Thank you for posting this!

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[@CK_Fitness]

So, just to clarify, the greatest amount of tension is generally created at the midpoint of the shortening and lengthening curve? So halfway up during a bicep curl (or halfway down)? Bonus- tension can and should be consciously generated (by squeezing and contracting a muscle) throughout the entire contractile range in order for muscular hypertrophy? Correct?

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helped a great deal. thanks

[@vincejavier1510]

I'm assuming this is applicable to all muscle fiber rather than exclusively cardiac? Thanks and keep up the awesome work!

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ok now i totaly understand what you said but what does all that do/mean?

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thanks for your fabulous effects but I want to ask you a favour how you make that type of video and with what programs?

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Is there a video about contraction types? :)

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What software he used to creat that sketching excellent work with recording

[@sakonkeatchathirunpong5896]

Why was the number 2 blocked (could u clarify me more about this pls.)

[@postiveelectron8879]

Thank you, but why would the sarcomere be streched/tight in the first place ? Isn't it's length stable ?

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can anyone explain the term "tension of muscule".....please

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you neglect the passive force though. the passive force is even higher than the active force in picture number 5. not realistic but in theory it's the highest amount of force that can be generated

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hes a bit philosophical ig

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what about the circulatory system that is in the title ? Dislike.

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