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: This is a crucial step. Warming up prepares the body for exercise, increases blood circulation, and allows muscles to better adapt to the upcoming exercise load. For example, start with a few minutes of easy jogging to make your body sweat slightly, and then do a full-body stretching exercise, focusing on the joints and muscles of the legs, waist, shoulders, etc. For example, Xiao Li's team did not warm up seriously before a competition, and as a result, the first player felt tight in his muscles shortly after he ran out, which affected his follow-up performance.