女子中长跑运动员与乏训练者在不同负荷状态下STI变化特征的比较与评价

Comparison and Evaluation to STI Changes During Different Loading States for Trained and Non-trained Women

本研究通过对优秀耐力跑运动员与非运动员STI的变化进行比较,以观察女子中长跑运动员在安静状态下、三级递增负荷期间以及恢复期间STI诸多指标的变化特征、变化规律以及各指标变化之间的相互关系,分析变化产生的原因,并提出相应的评价标准。结果发现优秀运动员STI表现出:①STI各指标受HR影响较小;②LVET、EMT、MST、ICT及PEP在负荷过程中均有一临界值,且在最大负荷期间仍保持相对稳定;③在负荷状态下EML与Q-U/LVET比值保持相对稳定;④PEP/LVET比值随负荷递增不断递减;⑤STI各指标恢复速率高。

This study tries to observe and compare STI changes during different loading states for trained and non-trained women, and understand regular patterns, characteristcs and interrelation of various STI indexes, and find out changing causes and put forward according standard to evaluate. Results suggest that following changes occur in trained girls; (1) effect of heart rate on STI indexes is smaller; (2)critical values exist in LVET, EMT, MST, ICT and PEP, and they remain relative stable during maximal loading; (3) EML and Q-U/LVET ratio remain relative stable; (4) PEP/LVET ratio decrease successively along with exercising intensity progress successively; (5) easy recovery from exercising states.