This is not possible. The spinal cord is wired so that when an extensor muscle contracts, a flexor muscle must relax. It is not possible to contract antagonizing muscle groups at the same time.
If I'm not mistaken I believe that for this movement to happen there are two muscles that need to be used- because muscles work in pairs. For this particular movement I am sure that the Agonist muscle (prime mover), the muscle that relaxes, is the Bicep. And the Antagonist, the muscle that contracts, is the Tricep.
When you work the muscles gets stronger and healthy.
Muscle cramps occur when muscles contract involuntarily and do not relax. This can happen due to various reasons such as dehydration, muscle fatigue, or electrolyte imbalances. When a muscle cramps, the normal communication between the nerves and muscles is disrupted, causing the muscle to contract and stay contracted. This can lead to pain and discomfort until the muscle relaxes.
the boys would swoon at their muscles.
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yes burnig of candle chewing of food
boob musles. Vaginal muscles. These have to be relaxed for childbirth to happen.
What happens when a muscle shortens is that it is contracting. This is when the fibers of the muscles generate tension.
They be hot and and put storng
Yes, the antagonist can also be the protagonist in a story. This can happen when the character's actions and motivations are complex and they are portrayed in a way that makes the audience empathize with them, blurring the lines between good and bad.
With some muscles, called voluntary muscles, you must think of the movement for it to happen. With involuntary muscles, however (like the heart and diaphragm), your brain does the moving automatically without you having to think about it ahead of time.
9-11