背向滑步和后撤步是两个不同的推铅球技术, 目前对这两种技术的教学效果尚未作可靠定量对比分析。研究表明,在普通中学,后撤步技术的好于背向滑步技术的教学效, 其差异达非常显著水平;且两种技术在结构上也有许多不同,背向滑步难度高于后撤步技术, 在普通中学可试行和推广后撤步的教学。 Back sliding and retreat are two different shot put techniques, the current teaching of these two technologies have not yet been a reliable quantitative comparative analysis. Research shows that in ordinary secondary schools, the effect of back-step technique is better than that of back-slipping technique, and the difference is very significant. There are also many structural differences between the two techniques, and the difficulty of back-slipping is higher than that of back- Step-by-step techniques that can be piloted and promoted in ordinary high schools.