This video is an excellent presentation of the henneman's size principle. I use it in my resistance weight training. I use heavier weights in my compound resistance exercises than in isolation resistance exercises. Using this approach, I am attempting to train type 2 muscle fibers and type 1 muscle fibers, respectively. Also, this approach impacts myofibrillar hypertrophy training with compound exercises and sarcoplasmic hypertrophy with isolation exercises
Love your videos!! ......You know that moment when you finally FULLY understand something...well I have those moments watching your videos so thanks they have been Super Helpful!
Here for medical information, not sports. But really well done. Well organized. Clearly explained. Efficient-- a good amount of info in only a little time. Good job. Thank you.
Good question. Muscles have many nerves and each nerve goes to one motor unit (group of muscle fibers). One nerve always activates every muscle fiber within that motor unit. But you may only activate for example 50 motor units (all type 1) for a light exercise vs. 500 motor units (type 1, type 2a, and type 2x) for a heavier exercise.
Thanks for the video! Can you explain how Concentric only movement and Eccentric only movement affect the recruitment of motor units? Am i right in saying that since Concentric movements only use Active elements (Myosin-Actin Contraction) and not passive elements (Titin/ Collagen..) the fast rate of contraction means fast rate of fatigue, thus exhausting type 1 fibers faster, which then activate the type 2 muscle fibers? On the other hand, the Eccentric only movement does not require as much Active elements (Myosin-Actin contraction) with the help of Titin Protein molecule that generates another source of force, thus it mainly activates higher threshold of motor units (Type 2) ? Does the eccentric only movements not involve Type 1 as much? Thanks!
There is some evidence that some people can do what you're suggesting which is selective recruitment of type 2 fibers first. However in general most muscles contract with type 1 first then type 2 if needed.
@@samuellewis3991 But it could be protective for example if you needed to jump out of the way of an oncoming car. So there's a reason the body may learn to develop selective recruitment.
@@samuellewis3991 Yea over time as you develop better connection between the brain and type 2 muscle fibers they can begin to be selectively recruited.
If soleus has high type I ( 80-95% composition), should I change this muscle with more high reps and intensive tempo ( slow eccentric) to gain muscle hypertrophy? I feel a bit confused about how to use these information into practice although I understand clearly all your information Thank you :)
You missed an important part of the activation. In that, during sustained exercise resulting in fatigue, additional motor units are activated to sustain force- which can include the activation of higher threshold motor units during a relatively low intensity exercise providing that exercise is performed to failure or close to failure
I’m not the smartest in this field, so to summarize what you said in layman’s terms - when jogging or walking (the exercises that he said only use type 1 fibers) for a long time, and no more type 1 fibers are left, the body will start to recruit type 2 fibers. Then when those run out, muscle failure is reached. - Is that the gist?
@@chrisawesome3091 it's more like if you were to do a set of biceps curls with a low weight for example. At first maybe there is a good proportion of type 1 fibres and type 2 fibres active. However the fibres Doing the work will soon fatigue (predominantly the type 2 fibres due to their lower resistance to fatigue) so then more type 2 fibres will have to be recruited to assist the now fatiguing fibres in order to sustain the exercise. This will basically go on until a vary large amount of motor units are recruited to attempt to sustain the exercise until all the muscle fibres are fatigued and the exercise cannot continue.
@@aztechproductions5146 also, would my first comment be correct about if one walks or jogs (only uses type 1 fibers) and then eventually fatigues all those fibers, will the body start to use type 2 fibers and then muscle failure is reached? Or once the type 1 is used up, muscle failure is reached?
@@chrisawesome3091 jogging is too maintainable to really fatigue all the fibres as it mainly used type 1 fibres and type 1 are more aerobic and so are more resistant to fatigue. You would need an intensity of exercise that would build up enough lactate to cause localised muscular fatigue. So more like cycling up a hill or something like that
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This video is an excellent presentation of the henneman's size principle. I use it in my resistance weight training. I use heavier weights in my compound resistance exercises than in isolation resistance exercises. Using this approach, I am attempting to train type 2 muscle fibers and type 1 muscle fibers, respectively. Also, this approach impacts myofibrillar hypertrophy training with compound exercises and sarcoplasmic hypertrophy with isolation exercises
Helps with A&P test I'm taking in the morning! Thanks!
Thank you, im taking a strength and conditioning class right now towards my Exercise Science degree and this video helped me!
You're welcome!
Great explanation..thanks!! Your lectures are really helping me understand my ACE CPT course material 😃
Love your videos!! ......You know that moment when you finally FULLY understand something...well I have those moments watching your videos so thanks they have been Super Helpful!
Here for medical information, not sports. But really well done. Well organized. Clearly explained. Efficient-- a good amount of info in only a little time. Good job. Thank you.
Your videos are really helping me learning fitness. I regularly watch your channel.
I appreciate that! Happy to help!
Thank you! All your videos have helped my studying
Great! I'm glad they have been helping
Your short vids help me out SO much! Thank you so much for simplifying these complex concepts :)
So glad you have a video on this!! I'm studying this for my exam!!
Studying the CSCS and watching these videos is helping tremendously. Love what ya do!
Thanks!
same when I study CSCS always his channel is on and search the topic to a better understanding
Thank you!!! This video is so helpful in understanding what muscle fibers we use when :)
Glad it was helpful!
Thank you Matt as usual !
You're welcome!
Hey man. Nice video. Great work and well explained. Thank you. Ben.
Thanks Ben!
Such a good explanation 👏
Thank you!
Your graph was cool too thanks
Thanks
Thank you! Very helpful ❤️
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Great explanation!
Thanks!
Thank you!
Glad it was helpful for you!!
Great video keep up the good work well done.
Thank you!
Thank you so much!
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Wow. Thanks, man!
Thanks for watching!
Thank you. Great informative video. Thumbs up from me
Thanks!
Very well explained. Thanks!
Great info as always! Thanks for all of your videos! 💫🙏🏼😄
Thanks! Trying to keep really high quality info!
Very informative 😎. Your hairstyle remind me Sheldon Cooper TBBGT
Haha thanks!
Sooper
Question, if all the muscle fibers are being activated on one signal from the nervous system, how can only one type be recruited for specific jobs?
Good question. Muscles have many nerves and each nerve goes to one motor unit (group of muscle fibers). One nerve always activates every muscle fiber within that motor unit. But you may only activate for example 50 motor units (all type 1) for a light exercise vs. 500 motor units (type 1, type 2a, and type 2x) for a heavier exercise.
Thanks for the video! Can you explain how Concentric only movement and Eccentric only movement affect the recruitment of motor units? Am i right in saying that since Concentric movements only use Active elements (Myosin-Actin Contraction) and not passive elements (Titin/ Collagen..) the fast rate of contraction means fast rate of fatigue, thus exhausting type 1 fibers faster, which then activate the type 2 muscle fibers? On the other hand, the Eccentric only movement does not require as much Active elements (Myosin-Actin contraction) with the help of Titin Protein molecule that generates another source of force, thus it mainly activates higher threshold of motor units (Type 2) ? Does the eccentric only movements not involve Type 1 as much? Thanks!
Hi! So during powerful muscle contractions, the fast fibers will not be recruited first correct? This video was very helpful, keep doing what you do!
There is some evidence that some people can do what you're suggesting which is selective recruitment of type 2 fibers first. However in general most muscles contract with type 1 first then type 2 if needed.
@@TheMovementSystem Why would that even be beneficial? You'd be using a nonrenewable resource, depleting an energy system before it was necessary.
@@samuellewis3991 But it could be protective for example if you needed to jump out of the way of an oncoming car. So there's a reason the body may learn to develop selective recruitment.
@@TheMovementSystem So it's not just that the fibers are sitting in reserve, it's that they actually behave differently?
@@samuellewis3991 Yea over time as you develop better connection between the brain and type 2 muscle fibers they can begin to be selectively recruited.
A motor unit is the neuron and the muscle fibers it innervates.
Correct
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If soleus has high type I ( 80-95% composition), should I change this muscle with more high reps and intensive tempo ( slow eccentric) to gain muscle hypertrophy? I feel a bit confused about how to use these information into practice although I understand clearly all your information
Thank you :)
Hey whats up guys
How can I develope bigger motor units as a teenager, and how?
Lift heavy weights consistently
If i do 100 reps to failure with a low weight, do i only use tipe 1 or at the end, when i almost reach failure, I use also tipe 2?
Thank you
What about Type 2 b ?
How do I get superstrong?
Is it possible that motor units fire in an incorrect order. IE 2 X first
You missed an important part of the activation. In that, during sustained exercise resulting in fatigue, additional motor units are activated to sustain force- which can include the activation of higher threshold motor units during a relatively low intensity exercise providing that exercise is performed to failure or close to failure
I’m not the smartest in this field, so to summarize what you said in layman’s terms - when jogging or walking (the exercises that he said only use type 1 fibers) for a long time, and no more type 1 fibers are left, the body will start to recruit type 2 fibers. Then when those run out, muscle failure is reached. - Is that the gist?
@@chrisawesome3091 it's more like if you were to do a set of biceps curls with a low weight for example. At first maybe there is a good proportion of type 1 fibres and type 2 fibres active. However the fibres Doing the work will soon fatigue (predominantly the type 2 fibres due to their lower resistance to fatigue) so then more type 2 fibres will have to be recruited to assist the now fatiguing fibres in order to sustain the exercise. This will basically go on until a vary large amount of motor units are recruited to attempt to sustain the exercise until all the muscle fibres are fatigued and the exercise cannot continue.
@@aztechproductions5146 ook. I get it now, ty. I think I saw, in another video, an animation explaining this.
@@aztechproductions5146 also, would my first comment be correct about if one walks or jogs (only uses type 1 fibers) and then eventually fatigues all those fibers, will the body start to use type 2 fibers and then muscle failure is reached? Or once the type 1 is used up, muscle failure is reached?
@@chrisawesome3091 jogging is too maintainable to really fatigue all the fibres as it mainly used type 1 fibres and type 1 are more aerobic and so are more resistant to fatigue. You would need an intensity of exercise that would build up enough lactate to cause localised muscular fatigue. So more like cycling up a hill or something like that
For a big crap go with the Type-II fibers. Then flush with the Type-I fibers.
Concerning the All-or-Nothing Principle in recruiting muscle fibers via nerve impulses: Quite simply, there are no half-ass muscle fibers.
Im super late here but you think its possible to use 100% of a muscle
hii daddy
*Type 2b
Not necessarily. There's a spectrum of fiber types potentially including 2b but that's not likely a very large % of human muscle fiber types
I think your'e color blind my dude. The "purple" looks pretty red. Might be purple irl idk
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Thanks for watching!
Awesome explanation !
Excellent explaination!
Thank you!
You're welcome!