In my last post I asked you dear readers what you thought was the strongest muscle in the body is. Many of you agreed that the tongue is the strongest. If this were a contest I’d be hanging onto the prize because due to a technicality I’m afraid you all lost. (Though to be honest, you’re not alone. The tongue is possibly the most common answer for this question.)
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So what is the strongest muscle in the body? Well that’s debatable. There are various reasons why this is so. One being that there are different ways to measure strength: Absolute strength (maximum force exerted), dynamic strength (repeated motions), elastic strength (exert force quickly), and strength endurance (withstand fatigue).
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Another reason being that muscles do not work alone. It’s not realistic to isolate the rectus femoris and compare it to others because other quadricep muscles contract with it. I suppose one could argue that the quadricep group is the strongest, but then you wouldn’t be singling out one muscle and claiming it as the strongest, but an entire group. That opens up a whole new category.
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There are also different biomechanical factors that one would need to consider as well. Muscle length and the points on the bones where muscles attach (origins and insertions) also play a role in a muscle’s strength.
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The statement that the tongue is the strongest muscle in the body, while obviously a crowd favorite, isn’t so. It is difficult to find any definition of strength that would make this true. Also, note that the tongue is made up of 16 muscles, not one. This puts it into that “other” category along with the quadriceps.
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Strength usually refers to the ability to exert a force on an external object. By this definition, the masseter (chewing muscle) would be the strongest. It can close the teeth with a force as great as 55 pounds on the incisors and 200 pounds on the molars.
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If strength refers to the force exerted by the muscle itself, then by definition the quadriceps femoris (not to be confused with the quadricep group) or the gluteus maximus would be the strongest. Did you know that the gluteus maximus is referred to as the anti-gravity muscle? It is quite powerful because one of its jobs is to keep our trunk erect.
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Pound for pound, the myometrial layer of the uterus may be the strongest muscle in the human body. Short muscles are stronger than long muscles. This muscle is one of the many that assists during labor.
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The external muscles of the eye are frequently considered the strongest muscle for the job they have to do. They are constantly moving to readjust the position of the eye. It is said that in an hour of reading, the eyes making nearly 10,000 coordinated movements.
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The heart is considered the hardest working muscle. Daily it pumps at least 2,500 gallons of blood. It also has the ability to beat over 3 billion times in a person’s life. 3 billion doesn’t seem like that much when spread out over 80+ years does it?
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Some other fun facts:
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- Bulkiest muscle = gluteus maximus
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- Muscle with the most surface area is the latissimus dorsi
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- The smallest muscle is the stapedius, attached to the smallest bone in the ear.
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- The longest muscle is the sartorius.
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- The only jointless bone in your body is the hyoid bone in your throat.
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- The average cough comes out of your mouth at 60 miles per hour.
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- Human thigh bones are stronger than concrete.
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- There are 10 human body parts that are only 3 letters long (eye, hip, arm, leg, ear, toe, jaw, rib, lip, gum)
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- The average human will shed 40 pounds of skin in a lifetime (imagine losing that all at once!)
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- You were born with 300 bones. When you get to be an adult, you have 206.
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- Each square inch of human skin consists of 20 feet of blood vessels.
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