Whether you are a student who wants to be fitter, a netballer who wants a faster more powerful throw, a sprinter who wants to win that gyeongju or a weightlifter who wants to lift more heavier weights, you room trying to make your muscles occupational better.

You are watching: What is the amount of force a muscle can exert


There space three significant factors that impact how well your muscles carry out – strength, power and also endurance.

Strength

Muscle strength is also a an outcome of the combination of 3 factors:

Physiological strength, which relies on determinants such together muscle size, the cross-sectional area of the muscle and responses come training. Neurological strength, i beg your pardon looks at just how weak or how strong the signal is the tells the muscle to contract. Mechanical strength, which refers to a muscle’s pulling force and also the way those pressures can be changed using bones and also joints together levers.

When we talk around the stamin or muscles, we are describing the maximum force a muscle can exert. Muscle strength is directly dependant top top the size of the cross-sectional area of muscle, for this reason if after a period of training, you rise your muscle size by 50%, girlfriend will likewise increase the force the muscle can construct by 50%.

For every 1 square centimetre of overcome sectional area, muscle fibres can exert a maximum force of about 30–40 newtons (the weight of a 3–4 kg mass).

Example: Emily have the right to lift 21 kg (210 newtons force) utilizing muscles that have a cross-sectional area that 6 cm2. Use this formula to work-related out how numerous newtons per square centimetre she muscles can pull with:

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Emily’s friend Alisha has actually larger muscle that have a cross-sectional area the 8 cm2. Usage this formula to occupational out what weight Alisha should have the ability to lift if she muscle organization is comparable to Emily’s:

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Power

When muscles contract or large in relocating a fill they execute work, and energy is moved from one kind 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 increase a distance of 1.5 m. 100 kg has a weight force of 1000 newtons. Use this formula to calculation the job-related done (energy transferred) through the weightlifter:

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If the weightlifter lifts the 100 kg explosively and takes just 0.5 seconds to make the lift, usage this formula to calculation the strength their muscle produce:

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Where walk the power come from and also where does the go?

The power for muscle contraction originates from glucose transported through the blood and deposited in muscle tissues. In the weightlifter example, the power has been revolutionized to gravitational potential energy. Also, heat power will be produced in the muscle tissues themselves. This method that the muscles will have actually transferred even an ext energy 보다 the quantity calculated above.

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Putting the relationship together

There room three different equations that can be simplified to make an even much more useful equation:

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Because

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the formula have the right to be rewritten: strength = force × velocity

Sports scientists use this formula to measure up the strength profiles of particular sets of muscles by measuring both the force of the muscles and also the rate with which they are contracting or lengthening. Lock have uncovered that the biggest power is created when the load is much much less than the maximum fill on the muscles.