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A tennis player's serve, a runner's stride, and a golfer's swing are examples of techniques that are very important for excellence in each of those sports. Computers can help people improve their technique by analysing and comparing images of their performance. Computer video is particularly common for this type of application. Computing technology is also used to measure fitness. This can include the fat/muscle composition of the body, the amount and flow of air into the lungs, as well as heart rate.
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