![]() Power also is measured in dBm, a relative logarithmic measure with 1 milliwatt as reference, calories per hour, Btu per hour (Btu/h).Įlectric power is defined as the amount of work done by an electric current, or the rate at which electrical energy is transmitted. One horsepower is equivalent to 33,000 foot-pounds per minute, or the power required to lift 550 pounds by one foot in one second, and is equivalent to about 746 watts. Other units of power include ergs per second (erg/s), horsepower (hp), and foot-pounds per minute. 1 watt is equal to 1 joule per second (J/s). In the SI system, power is measured in watts (W). In physics, power is the rate at which work is performed or energy is transferred. This article was written by Kateryna YuriĬommon Unit ConvertersLength, mass, volume, area, temperature, pressure, energy, power, speed and other popular measurement unit converters. 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. 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. 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. This is useful for people with injuries undergoing rehabilitation, or for those who want to carefully monitor their exercise routines.Īccording to some theories of exercise, the biggest performance improvement happens at a certain range of stimuli for a given individual. They can be programmed to provide warnings when a given power threshold is exceeded. ![]() Along with the overall measurements for the body, they can measure the power output for specific muscle groups. It measures the strength of different muscle groups. An isokinetic dynamometer consists of an exercise machine with sensors, connected to a computer. 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.Ī chassis dynamometer can measure torque and power delivered by the power train of a vehicleĭynamometers can also be used to calculate the strength of people for sports or medical reasons. For example, this calculator shows that a person 170 cm tall and weighing 70 kg will produce a power output of 39.5 watts by doing 50 push-ups for 10 minutes. ![]() Some websites help athletes calculate the work performed and the power output for different types of physical exercises, based on the weight of the athlete and of the equipment used, the distance traveled, estimated using the athlete’s height for exercises like weight lifting, and the exercise duration. 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. Work produced by animals and humans can be measured using power. Machines are not the only objects that can be evaluated through power.
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