Is There Power Involved in Holding a Weight at Rest?

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Holding a weight at rest does require energy expenditure from the body to maintain muscle tension. However, since there is no movement or displacement, no mechanical work is done according to physics principles. The distinction between "effort" and "work" is crucial, as effort involves energy use without resulting in work. Therefore, while energy is used to hold the weight, power is not involved during the static hold. Understanding these concepts clarifies the relationship between energy, work, and power in weightlifting scenarios.
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For example,
if you are going to the gym and lift a 5kg weight and you lift it till you wrist level and stop moving. Does your body lose/exerts energy during the interval when you are not moving?
And is there are power involved?
 
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matttan said:
For example,
if you are going to the gym and lift a 5kg weight and you lift it till you wrist level and stop moving. Does your body lose/exerts energy during the interval when you are not moving?

Yes, one "uses" energy to hold the weight.

matttan said:
And is there are power involved?

No, since there is no displacement, no work is done. Note that "effort" and "work" are not the same thing.

CS
 

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