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: Correct posture can effectively reduce energy consumption. When running, keep an upright position, with your shoulders relaxed, your arms swinging naturally with a moderate amplitude, and your legs alternating and forcefully stepping on the ground. The cadence should be fast and steady, with a moderate stride length, not too large or too small. Take Xiao Wang as an example, he used to run in an incorrect posture, always hunched over, not only could not improve his speed, but also was very easy to get tired. Later, after correcting the correct posture, I was much more relaxed in the 500-meter relay and my performance improved a lot.

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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.

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