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反应时在运动实践中应用极为广泛，有经验的教师和教练员都用手动控制测定学生和运动员的反应时。根据心理学实验室中反应时测定仪的原理，研制出能在运动场上直接测定起跑反应时的DZW—A型起跑反应时测定仪。本仪器主要用于测定运动员起跑反应时和起跑教学中的反应时测定，测定的数据对于提高短跑速度专门训练效果、创造优异成绩和体育选材及改进体育专业起跑教学质量等提供了科学依据。
Reactions are widely used in sports practice. Experienced teachers and coaches use manual controls to measure student and athlete reactions. According to the principle of the reaction time detector in psychology laboratory, a DZW-A start-up time-of-reaction meter which can directly measure the start-up reaction in the sports field was developed. The instrument is mainly used to determine the reaction time when the athletes start the reaction and the starting reaction, the measured data provide scientific basis for improving the special training effect of the sprint speed, creating excellent grades and sports material selection and improving the teaching quality of PE specialty.