黑龙江阿城一中的中老年教师长期坚持慢长跑活动,收到了良好的效果。参加这项活动的中老年教师占全校教师总人数的三分之二。两年来,每天下午第二节课下课铃响后,这些同志就纷纷来到运动场,稍作准备活动后,就沿着四百米跑道外圈,步伐均匀、节奏轻快地跑了起来。一圈、两圈,最多的可跑四圈,时间 Middle-aged and middle-aged teachers in a city of Heilongjiang acridine long-term adherence to slow long-distance running, received good results. Middle and aged teachers participating in this activity accounted for two-thirds of the total number of teachers in the school. In the past two years, after the bell rang in the second lesson every afternoon, all these comrades came to the stadium one after another. After a little preparatory activity, they ran smoothly and rhythmically along the outer ring of the 400-meter runway. One lap, two laps, up to four laps, time