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Machines are not the only objects that can be evaluated through power. Work produced by animals and humans can be measured using power. For example, the power of an athlete throwing a basketball can be calculated by finding the force, with which she propels the ball for a given distance and the time during which she completes this work. For example, this calculator shows that a person cm tall and weighing 70 kg will produce a power output of Some athletes use special devices for these calculations, record their performance with respect to power output, and then analyze it to determine the effectiveness of their workout program.
Power can be measured by a special device, a dynamometer. Dynamometers can also measure torque and force. They can have a range of applications, from engineering to the medical field. For example, dynamometers can help measure and evaluate the power output of engines. There are two types of dynamometers, the engine, and the chassis type. Engine dynamometers can only work with engines, taken out of the vehicle or machine, but they are more accurate.
Chassis ones can be used more easily, but are less accurate and more expensive. Dynamometers can also be used to calculate the strength of people for sports or medical reasons.
They are usually the isokinetic type. An isokinetic dynamometer consists of an exercise machine with sensors, connected to a computer. It measures the strength of different muscle groups. Along with the overall measurements for the body, they can measure the power output for specific muscle groups. They can be programmed to provide warnings when a given power threshold is exceeded.
This is useful for people with injuries undergoing rehabilitation, or for those who want to carefully monitor their exercise routines. According to some theories of exercise, the biggest performance improvement happens at a certain range of stimuli for a given individual. When the exercise is too easy, there is no improvement, and when the exercise is too difficult, the athlete may have poor performance due to overstraining.
For exercises that depend on the environment, such as cycling and swimming, it is difficult to measure the stimulus, because one has to consider various environmental aspects such as the effect of wind or the conditions of the ground or water on the strain, produced by exercise.
Power is one of the easiest ways to measure this stimulus by tracking the response of the athlete to the stimulus with a dynamometer; therefore it is a useful concept in exercise.
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