Barbara Bruce, Clinical Director of Mayo Clinic’s Pain Rehabilitation Center in Rochester, Minn., provides a brief introduction to the Clinic.
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In the penultimate episode of Crash Course Anatomy & Physiology, Hank explains your adaptive immune system. The adaptive immune system’s humoral response guards extracellular terrain against pathogens. Hank also explains B cells, antibodies, and how vaccines work.
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Table of Contents
Adaptive Immune System’s Humoral Response 1:19
How B Cells Mature, Identify Antigens, and Make Antibodies 2:42
How Antibodies Warm Pathogens and Mark Them for Death 5:22
Active and Passive Humoral Immunity 6:03
How Vaccines Work 6:27
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http://www.handwrittentutorials.com – This tutorial looks at the differentiation of the cells of the immune system. Beginning with the stem cell, the tutorials maps the differentiation of the cells to their functional state. For more entirely FREE tutorials and accompanying PDFs visit http://www.handwrittentutorials.com
Hank calls in a friend to do his push ups for him today to explain how skeletal muscles work together to create and reverse movements. Hank and Claire also demonstrate the role size plays in motor units, the three phase cycle of muscle twitches, and how the strength and frequency of an impulse affects the strength and duration of a contraction. This episode also explains twitch summation, tetanus, and isotonic vs. isometric movements.
Table of Contents
Skeletal Muscles Work Together to Create and Reverse Movements 1:14
Motor Units 3:52
Three Phases of Muscle Twitches 4:41
Strength and Frequency of Impulses 5:29
Strength and Duration of a Contraction 5:29
Twitch Summation vs Tetanus 6:19
Isotonic vs Isometric Movements 8:50
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View full lesson: https://ed.ted.com/lessons/what-makes-muscles-grow-jeffrey-siegel
We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow. Jeffrey Siegel illustrates how a good mix of sleep, nutrition and exercise keep your muscles as big and strong as possible.
Lesson by Jeffrey Siegel, animation by Brett Underhill.
We’re kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing in a process called the sliding filament model. Your skeletal muscles are constructed like a rope made of bundles of protein fibers, and that the smallest strands are your actin and myosin myofilaments. Its their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax.
Table of Contents
Smooth, Cardiac, and Skeletal Muscles Create Movement 1:18
Sliding Filament Model 4:52
Skeletal Muscles Are Made of Bundles of Protein Fibers 2:40
Actin and Myosin Myofilaments 3:54
Calcium and ATP Cause the Binding and Unbinding 5:05
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It doesnât take long to get âbiggerâ muscles if you know how to improve the muscularity of your physique. In this video, Iâm going to show you 4 workout techniques that you should start implementing into your training right now to start seeing fast changes in the way your body looks. With Summer just around the corner, you are going to want to use these tips to get bigger muscles quickly.
It starts with the realization that you donât have to actually grow bigger muscles in order to have bigger looking muscles. This has to do with the key difference between muscle size and muscularity. This is good news however since making true muscle gains at any appreciable rate becomes much more challenging the more training experience that you have.
Beyond that, ultimately your genetics are going to have something to say about the size that you can eventually become. No matter how hard Jesse trains he is never going to be a 300 pound beast unless he figures out a way to go back in time and choose different parents.
That said, when you realize the advantage in training for muscularity you can quickly see new changes with not much having to change at all about your current workouts. It comes down to the following four workout strategies for building bigger looking muscles. Make sure that you apply these to your accessory lifts and not necessarily your big compound strength movements. Keep your foundational training the same and incorporate these as an adjunct to increase the rate of muscle gains and muscularity you see.
First, you want to make sure that you limit the amount of momentum you use in your lifts and make your muscles do the work instead. This can easily be seen in the example of a side lateral or front shoulder raise. If you swing or bounce the weights at all you are likely to shut down the amount of work being done by the very muscles you are trying to hypertrophy. Drop the weight you are using and make sure that every rep is being initiated and controlled by the delts and not only will they be doing more of the work at the end of the day but you will see size gains because of it.
Second, stop counting reps and start making reps count. You can do this by not worrying about just getting the weights from point A to point Z but by enjoying the journey from B to Y on every single rep you do. In the case of the crossover, you donât just want to get your arm across your body to engage your chest but you want to appreciate the benefits that additional internal rotation below shoulder height and keeping the shoulders back can have on increasing the output and gains seen by the chest as a result.
Thirdly, you want to learn how to squeeze every rep as if itâs the only one you are going to do. Donât worry if you are going to have anything left in the tank for the 12th rep. Instead, focus on getting the most you can out of the rep youâre doing and let the rest take care of itself. I apply this to the lat pulldown and you can see even additional muscle fiber recruitment as you squeeze and hold from the first second to the last.
Finally, in some cases the working muscles will actually do more work if you let the muscles around them help them to do so. In the case of the dumbbell curl, the activation of the abs is going to help stabilize the body and give the biceps more leverage from which to pull from. Likewise, the activation of the chest and lats is going to prevent the elbows from drifting and cheating the work the biceps are doing, therefore giving them more stimulus for faster muscle growth.
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