Table of Contents:
Biomechanics 7Isometric isotonic contractions
Video taken from the channel: Wendy Riggs
Concentric-Eccentric Muscle Contraction Fitness Tip_02-18-13
Video taken from the channel: SCSU Huskies
Muscle Contractions
Video taken from the channel: Institute Education
Length Tension Relationship (Video 2.6) PhysioStasis
Video taken from the channel: Prof. Roofs, MD
Eccentric exercise in maximizing patient rehabilitation
Video taken from the channel: ECSS.tv
The Force of Muscle Contraction
Video taken from the channel: EmpoweRN
Concentric Contraction: What Is Concentric Exercise All About (Rehab)
Video taken from the channel: Physio Explain
Concentric contractions are muscle movements that shorten your muscle fibers when performing an action. Essential to increasing muscle mass, concentric movements help to.Concentric contractions are a central aspect of the growth and development of muscles. As muscle contracts, they begin the process of hypertrophy (“hyper” meaning increased and “trophy” meaning growth). With muscle hypertrophy, each muscle cell will grow under the influence of consistent stress.
Concentric contraction involves shortening of the muscle with requisite movement of the origin or insertion and limb translation. 9 Athletes use concentric contractions to counter a load. They are used to accelerate the distal segment of the limb and attached equipment, such as a racquet or ball.
Concentric contractions are considered positive contractions. It will make more sense if you think of doing bicep curl while I explain. The bicep starts at a rest and then contracts concentrically (positive) while you curl the weight. During this process your bicep muscle shortens and acts against the weight.
Concentric Contraction Eccentric contraction activates the muscles so that tension on a muscle is increased as it lengthens. This phenomenon ordinarily occurs whenever a muscle counters a stronger force which leads to lengthening of muscle as it contracts.A concentric contraction causes tension on the muscles as it shortens by generating force. When you perform a bicep curl, you are doing a concentric contraction by squeezing the muscles. Generally, this is the only part of an exercise people focus on.
During a concentric movement, the muscle shortens as it speeds up the action. As your muscle gets shorter, it has enough force to generate a movement. An example of a concentric movement is the lifting in a bicep curl.
In an exercise program, you read tempo as a four-digit number.While concentric contractions help to build strength in muscles, they can also contribute to the development of excess muscle tension. In addition to the concentric contraction, some other causes of tension imbalance include physical injuries, lengthy sedentary positions, and emotional trauma.When your muscles shorten, it’s a concentric contraction, and when they lengthen, it’s an eccentric contraction, according to the American Council on Exercise. Isometric contractions occur when your muscle contracts and actively holds, meaning there’s no change in muscle length, according to the National Academy of Sports Medicine.
Muscle contractions can be described based on two variables: force and length. Force itself can be differentiated as either tension or load. Muscle tension is the force exerted by the muscle on an object whereas a load is the force exerted by an object on the muscle. When muscle tension changes without any corresponding changes in muscle length, the muscle contraction is described as isometric. If the muscle length changes while muscle tension remains the same, then the muscle contraction is isotonic.
A concentric contraction is a way of using the body’s muscles for physical tasks. A concentric muscle contraction is a very common kind of muscle contraction. It is part of many basic physical exercises and everyday activities. Some people use free weights to build muscle.Concentric (Positive) Contractions: Put simply, this contraction shortens your muscle as it acts against resistive force (like a weight).
For example, during a biceps curl, the biceps contract concentrically during the lifting phase of the exercise.The muscle tenses as you lengthen the muscle. With a concentric and eccentric contraction put together, you create a combination of fired up muscle motor units and tearing muscle fibers. This allows you to get bigger or stronger.
But, there’s got to be something else out there right?Concentric movement is when the muscle shortens while producing force (contracting the muscle). This happens when you are raising the weight during a biceps curl. Eccentric movement is when the muscle lengthens while producing force.
For example, when you’re lowering the weight back down during a.Concentric muscle contractions happen when the muscle shortens. Using the same example, the concentric movement is during the upward phase of a biceps curl.
Concentric moves have been known to help build speed and improve muscle mass and strength.
List of related literature:
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| from Miller’s Review of Orthopaedics E-Book | |
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| from Orthopaedics for the Physical Therapist Assistant | |
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| from Orthopedic Massage E-Book: Theory and Technique | |
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| from Biomechanics of Sport and Exercise | |
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| from Adult Physical Conditions: Intervention Strategies for Occupational Therapy Assistants | |
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| from Instructing Hatha Yoga: A Guide for Teachers and Students | |
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| from Pharmacology for Women’s Health | |
| |
| from Wellness and Physical Therapy | |
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| from Tidy’s Physiotherapy E-Book | |
| |
| from Medical Sciences |
40 comments
Great video. but why didn’t you include strength/contraction velocity relationship
What software you use to record and sketch in the same time to creat this video?
I get it every day ☹️ do you know why it happens to people every day
I was really hoping you were going to answer the question I have been trying to figure out. Very interesting to see a visual of how the myosin bond to the actin at different muscle contraction states. What I was hoping you were going to touch on is when total tension increases past the point of peak active tension due to the addition of passive tension, is this because the bonds formed at peak active tension (for example 16 myosin bonds in this video) would remain bonded whilst passive tension increases? Or do the myosin bonds still reduce as passive tension is added. And in that case how is the extra total tension generated?
Taking my A&P final today with a 93% in the class already, don’t think I could have done it without these videos! Thank you! Keep up the great work!
great video, thank you so much for helping me understand that the teacher didn’t know how to teach it
i wish the books were as clear as this dude in a video.
He deserves more than 10k subs.
Keep it up m8
thank you so much!! you explained very well. Can you do a video on electromyography?
so the more the muscle is stretched the less the tension. Less tension means more risk of injuries?
would this explain why muscles in their most extended position are vulnerable to tears when resistance is introduced?
You are awesome!!!!! Your students are so lucky!!! My teachers are soooooo boring.
1000 lbs for curls ����
Great video it helped me alot. Thanks
U r the best thank u for this explanation its just amazing!!
You have a great personality and bee informative too. Thank you darlin
thank you!! my teacher recommended your channel to me and it helps a lot
thank you so much! Couldn’t understand this relationship before. looking for one video on the strength-velocity relationship now!
You are supper excellent gifted prof wow… watch out women are coming! Big plus
Can you provide a scientific paper in which this information is written?
Hello,Roofs.
How are you?
What do you think about voluntary cramp on calvs for get stronger calvs?
I do only isometric exercises.
Thank you.
Can you do a video on how to use a stethoscope to listen to heart sounds?:)
also i have a question
how is eccentric and cocentric isotonic contractions
when actually the tension is not iso(constant) in these contractions as length is changing
The video is really helpful! Thank you!
I think you mentioned Video 2.4 in this video. But I cannot find it. Could you please tell me where I can find it?
If you enjoyed this video, feel free to subscribe at: https://bit.ly/2spRwdZ
Leave a comment here if you have any questions ��
Your’e a hero! A huge thank you from a physiotherapy student from Belgium, Europe
That was an awesome video. Now i can understand what Guyton says ������
thank you! I’m studying for an exam and muscle tension will be on there.
Thank you soo much sir for simplifying this physiological concept:) It has been a great help to me.
Awesome and so informative. Will be watching your other videos
woooow i wish i could just copy and paste this in my book. Very effective explanation
great! I have a question, how a nerve impulse can be more intense than another nerve impulse? I mean does a high intensive nerve impulse mean it has a greater flow of ions through the axon’s membrane?
Your are the best! I used your info while studying to be a massage therapist and now I’m using it to be an acupuncturist, thank you
OMG thank u
You just made really simple as if it really was������������������������������������������������������������
This is great! You are an amazing teacher. Thank you for posting this.
Awasome knowledge I got by you Mam about Isotonic & Isometric contraction and Mam plz also cover Isokinatic, myotatic reflect, plyomatric effect and Muscle synergy
When I flex my biceps consciously, does the triceps serve as an antagonist and both flex isometricly?
Love love love your videos!! Every time I’m confused about something and see you’ve done a video on the subject I choose your vid first!! Keep up the awesomeness!!! ����������
Wow the way you explain things is amazing,you make it fun to watch. Im trying to follow you on Instagram, how would I do that?
Oh my god I’m going to lose my mind. When we contract a muscle it’s become shorter or longer
Very clear detailed explanation made simple. Thank you and appreciate your video!
hit like if you are studying for USMLE step 1 and ended up here
You are the BEST teacher i’ve NEVER had, youre helping me succeed in medicine. I am sure everyone who has come across your videos feels the exact same way. Please dont stop making these videos! Highly appreciating them