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Running became the main form of national fitness. As the saying goes, "practice volts," keep on winter, summer, now it is winter, the winter is suited for running? Will make it easier to catch a cold attack? In the process and what need to pay special attention to matters?be sure to bring stopwatch to running exercise may be effective in preventing influenza.
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The author talks about the use of the electronic stopwatch and how to use it to talk about few points (for example, four-button electronic stopwatch). Learn the basic operation of the electronic stopwatch button (see stopwatch elucidation book)