一、问题的提出体育课的密度是客观评价体育教学质量的重要指标之一。它不仅直接影响到一堂课的生理负荷,而且也是检验教法的一种标志。因此在分析和评价体育课时,课的密度就特别引起人们的重视。测定一堂体育课的密度,传统的方法是两个人用两块秒表,一人按表,一人记录时间,然后统计、整理出各项活动的总时间及百分比,这种方法一个人用一块秒表测定不了一般密 First, the issue of the density of physical education class is one of the important indicators to objectively evaluate the quality of physical education. It not only directly affects the physiological load of a class, but it is also a sign of the test method. Therefore, in the analysis and evaluation of physical education classes, the density of classes has attracted particular attention. To determine the density of a physical education class, the traditional method is that two people use two stopwatches, one presses the watch, one records the time, and then statistics and sort out the total time and percentage of each activity. This method cannot be determined by a single stopwatch. General secret