I subscribed for this! I knew that the biceps' greatest moment arm are at 90-110 (from Brunnstrom) and this helped me understand the application of kinesiology into exercises. Thank you for this! Also, what you said at the end is true. The biceps is mainly recruited during forearm supination and elbow flexion. So if you want to exercise your biceps, better recruit it correctly.
Great video!! One thing I could correct is that the Biceps Muscle is a prime mover for supination. The muscle that does flexion is the brachialis muscle.
Thanks. Although you are correct that the biceps are responsible for supination, the biceps is also the prime mover (agonist) for elbow flexion, the brachialis is more of a synergist due its size. However, the reality it that these labels of prime mover vs. synergist are kind of silly anyway, since in truth they both carry a large portion of the load during elbow flexion movements like dumbbell curls. Here's a figure from an online anatomy textbook showing the biceps as the prime mover during elbow flexion, while the brachialis is a synergist: open.oregonstate.education/aandp/chapter/11-1-describe-the-roles-of-agonists-antagonists-and-synergists/
Always struggle with the true application of some of these principles, considering that in any everyday or athletic movement, you are utilizing 3-103 levers in your body to produce movement and torque, then you have to take into account neuro factors, fascia and tissue elasticity that act like rubber bands after stretching a tissue and more, and the importance of levers seems to be minimized. It is interesting to nerd out on sometimes, but it is really rare (if ever) that a therapist or performance coach really breaks any of this down in the gym or clinic. But it is part of every Kinesiology 101 course, so if that's the way its always been .....;)
what about with bands. and weights together . can you explain that? that would be cool to know. does the amount of force increase after 90 degrees with a band as the arm goes up?
Interesting, yes people tend to use band combined with weights because due to moment arms of some lifts, there really isn't much load into the muscles at the top of the lift, such as in a bench press or barbell squat. The band increases tension as it stretches more. That would indeed make a good video ;)
@@ShapeshiftWellness I think studies showed load increased or newton's of force increased as band gets longer. I can't remember the exact benefits. Something like that .
@@PUMPbyrob in middle of taking Kinesiology. I believe any movement after 90 degrees, the Mm will get decreased therefore less torque (muscle force) required. Anything below 90 or above 90 will require more force considering the line of pull will be closest to the axis of movement.
Hey! cool vid. I had a kinda a complicated question. So isn't the equation for torque (torque=distance*force*θ) (θ meaning the angle of which force is applied or theta) So in this equation force is multiplied by the angle in which force is applied. So, if you were measuring the torque from the fulcrum and using the bone as the moment arm, would you get the same answer as how you calculate it? Also that would still work with the theory of less force being applied when your are is parrellel with the ground because as the force was further from zero, the torque would decrease
@@ShapeshiftWellness chaturanga dandasana is the most obvious for the body. activation of the biceps in downward dog, upward dog, planks are less obvious and needs specific cueings
Can't tell if you're being sarcastic... On this channel I focus a lot on yoga, and it's important for yoga people to realize that yoga does not train the biceps. It's important to get out of that tunnel vision. Ido Portal is great, why do you bring him up?
@@ShapeshiftWellness My lack of punctuation did read somewhat sarcastically now that I look at it lol. I actually appreciated the fact you suggested strength training and other activities to build a more complete physical human. I mentioned Ido because he is the ultimate cross trainer. I have an extensive martial arts background and have enjoyed cross training with weights all my life so your words echoed my own thoughts on the subject. Fantastic channel - you're posts make me think and experiment more than most!
Awesome thanks for the clarification! Yep, Ido is great. There are so many wonderful people out there to draw inspiration from. I also have a long martial arts background so I can appreciate that too.
![The Stress-Strain Curve EXPLAINED [for Ligaments & Tendons]](/img/n.gif)
Easily the best video to explain these concepts
Thanks for the feedback, I'm glad it helped!
I subscribed for this! I knew that the biceps' greatest moment arm are at 90-110 (from Brunnstrom) and this helped me understand the application of kinesiology into exercises. Thank you for this! Also, what you said at the end is true. The biceps is mainly recruited during forearm supination and elbow flexion. So if you want to exercise your biceps, better recruit it correctly.
Thanks for the sub! I'm happy this video helped!
Great video!
Amazingly explained!
Great video!! One thing I could correct is that the Biceps Muscle is a prime mover for supination. The muscle that does flexion is the brachialis muscle.
Thanks. Although you are correct that the biceps are responsible for supination, the biceps is also the prime mover (agonist) for elbow flexion, the brachialis is more of a synergist due its size. However, the reality it that these labels of prime mover vs. synergist are kind of silly anyway, since in truth they both carry a large portion of the load during elbow flexion movements like dumbbell curls.
Here's a figure from an online anatomy textbook showing the biceps as the prime mover during elbow flexion, while the brachialis is a synergist: open.oregonstate.education/aandp/chapter/11-1-describe-the-roles-of-agonists-antagonists-and-synergists/
Great video bro you're a great teacher!
I appreciate that! Glad you liked the video!
Nicely explained, thank you!
Glad it was helpful!
Please keep posting this kind of videos for every muscle😢😅❤
Amazing nice explanation
Really good explanation of Moment arms! 💪
Fantastic. Thank you so much
Bravo 👏 excellent !
Always struggle with the true application of some of these principles, considering that in any everyday or athletic movement, you are utilizing 3-103 levers in your body to produce movement and torque, then you have to take into account neuro factors, fascia and tissue elasticity that act like rubber bands after stretching a tissue and more, and the importance of levers seems to be minimized. It is interesting to nerd out on sometimes, but it is really rare (if ever) that a therapist or performance coach really breaks any of this down in the gym or clinic. But it is part of every Kinesiology 101 course, so if that's the way its always been .....;)
Thank you🙏
what about with bands. and weights together . can you explain that? that would be cool to know. does the amount of force increase after 90 degrees
with a band as the arm goes up?
Interesting, yes people tend to use band combined with weights because due to moment arms of some lifts, there really isn't much load into the muscles at the top of the lift, such as in a bench press or barbell squat. The band increases tension as it stretches more. That would indeed make a good video ;)
@@ShapeshiftWellness I think studies showed load increased or newton's of force increased as band gets longer. I can't remember the exact benefits. Something like that .
@@PUMPbyrob in middle of taking Kinesiology. I believe any movement after 90 degrees, the Mm will get decreased therefore less torque (muscle force) required.
Anything below 90 or above 90 will require more force considering the line of pull will be closest to the axis of movement.
Thx
Hey! cool vid. I had a kinda a complicated question. So isn't the equation for torque (torque=distance*force*θ)
(θ meaning the angle of which force is applied or theta)
So in this equation force is multiplied by the angle in which force is applied.
So, if you were measuring the torque from the fulcrum and using the bone as the moment arm, would you get the same answer as how you calculate it?
Also that would still work with the theory of less force being applied when your are is parrellel with the ground because as the force was further from zero, the torque would decrease
You know lever arm and moment arm are not the same thing right?
are we discounting all isometric postures using biceps as null? Even in tadasana, I activate my biceps and triceps
Let's be reasonable here, tadasana is obviously not a pose that helps to strengthen the biceps. Can you come up with a better example?
@@ShapeshiftWellness chaturanga dandasana is the most obvious for the body. activation of the biceps in downward dog, upward dog, planks are less obvious and needs specific cueings
Awesome explanation! thank you
Great non tip at the end. I literally just watched an Ido Portal video before this.
Can't tell if you're being sarcastic... On this channel I focus a lot on yoga, and it's important for yoga people to realize that yoga does not train the biceps. It's important to get out of that tunnel vision. Ido Portal is great, why do you bring him up?
@@ShapeshiftWellness My lack of punctuation did read somewhat sarcastically now that I look at it lol. I actually appreciated the fact you suggested strength training and other activities to build a more complete physical human. I mentioned Ido because he is the ultimate cross trainer.
I have an extensive martial arts background and have enjoyed cross training with weights all my life so your words echoed my own thoughts on the subject.
Fantastic channel - you're posts make me think and experiment more than most!
Awesome thanks for the clarification! Yep, Ido is great. There are so many wonderful people out there to draw inspiration from. I also have a long martial arts background so I can appreciate that too.
saviour