Whether you room a college student who desires to be fitter, a netballer who wants a faster more powerful throw, a sprinter who wants to victory that race or a weightlifter who desires to lift heavier weights, you space trying to make your muscles work-related better.
You are watching: What is the main factor that determines the power of a muscle
There are three major factors that influence how well her muscles do – strength, power and also endurance.
Muscle stamin is also a an outcome of the mix of 3 factors:Physiological strength, which counts on determinants such as muscle size, the cross-sectional area of the muscle and responses come training. Neurological strength, i m sorry looks at how weak or how strong the signal is the tells the muscle come contract. Mechanically strength, which refers to a muscle’s pulling force and the method those forces can be adjusted using bones and also joints together levers.
When we talk around the strength or muscles, we are describing the maximum pressure a muscle have the right to exert. Muscle toughness is straight dependant upon the dimension of the cross-sectional area that muscle, for this reason if after ~ a duration of training, you boost your muscle dimension by 50%, you will additionally increase the pressure the muscle can construct by 50%.
For every 1 square centimetre of overcome sectional area, muscle fibres have the right to exert a maximum pressure of around 30–40 newtons (the load of a 3–4 kg mass).
Example: Emily can lift 21 kg (210 newtons force) utilizing muscles that have a cross-sectional area of 6 cm2. Usage this formula to job-related out how numerous newtons every square centimetre her muscles have the right to pull with:
Emily’s friend Alisha has larger muscle that have a cross-sectional area that 8 cm2. Usage this formula to occupational out what weight Alisha should have the ability to lift if her muscle tissue is similar to Emily’s:
When muscle contract or big in relocating a fill they do work, and also energy is moved from one form to another. The strength of muscles refers to how easily the muscles have the right to do this work and transfer the energy.
Example: A weightlifter elevator 100 kg up a distance of 1.5 m. 100 kg has a weight pressure of 1000 newtons. Usage this formula to calculate the occupational done (energy transferred) by the weightlifter:
If the weightlifter elevator the 100 kg explosively and takes just 0.5 secs to make the lift, use this formula to calculate the power their muscles produce:
Where walk the power come from and where does that go?
The energy for muscle contraction comes from glucose transported through the blood and deposited in muscle tissues. In the weightlifter example, the power has been changed to gravitational potential energy. Also, heat power will be generated in the muscle surfacetoairnewyork.comanization themselves. This method that the muscles will have transferred even more energy than the lot calculated above.
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Putting the relationships together
There space three various equations that have the right to be streamlined to do an even much more useful equation:
the formula have the right to be rewritten: strength = force × velocity
Sports researchers use this formula to measure up the power profiles of certain sets of muscles by measure up both the pressure of the muscles and also the rate with i beg your pardon they are contracting or lengthening. Castle have discovered that the greatest power is developed when the load is much much less than the maximum load on the muscles.