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心缩间期或STI“Systolic Time Intervals)能够反映心室收缩中张力——速度的关系,是评价心室收缩功能的较好指标,由于它是定量的,在测定中又有重复性强和敏感性高等优点,加之采用了非创伤性的测定方法,所以自六十年代以来,已多方面应用于心脏病学临床及心血管生理学。心缩间期的测定自七十年代介绍到我国,近数年已开始为运动生理学及运动员的机能评定所采用。国家体委体育科学研究所及上海体育科学研究所都在这方面做了大量的工作。从七十年代末至今就已运动员安静时正常值、不同项目的运动员负荷前后的对比及集
Systolic Time Intervals, or STI Systolic Time Intervals, reflect the tension-velocity relationship of ventricular contraction and are a good indicator of ventricular systolic function. Because it is quantitative, it is highly reproducible and sensitive in the assay Since the 1960s, it has been widely used in cardiology and cardiovascular physiology. The measurement of systolic interval was introduced into our country from the seventies. Nearly few Year has been started for the exercise physiology and athletes’ performance evaluation used.National Sports Commission Sports Science Institute and the Shanghai Institute of Sports Science have done a lot of work in this area.Since the late seventies has been normal athletes when quiet, Comparison of different athletes before and after the load and set