摘要
研究目的:为了以无创而简易的方法获取长期从事体育锻炼者的心力储备方面的信息,进行了该研究。研究方法:46名运动员和43名非运动员大学生加入测试,同时记录心动周期和心力信息,并把不同负荷下运动后第一心音(S1)幅值对安静时S1幅值增加的相应倍数定义为心力变化趋势(CCCT)。研究结果和结论:运动员在1/4运动量下的CCCT(1/4)和全运动量下的CCCT(1)与非运动员的CCCT(1/4)和CCCT(1)对应的心力数据间都有非常显著的差异(p<0.01),而仅部分心率数据间有显著的差异(p<0.05),说明运动员高水平的心脏储备主要是心肌收缩能力储备而不是心率储备。运动员和非运动员在不同运动量下的功率以及心力储备动用水平与所用时间的比值之间也有非常显著的差异(p<0.01),说明运动员比非运动员能更迅速地动员其心力储备。该方法可用来量度心肌收缩能力和评估运动员和一般人的心脏储备,为运动员选拔、训练安排、竞赛安排以及一般人体质评估提供一种客观量化的参考指标。
To obtain information on cardiac reserve of long -term exercisers with a non-invasive and ease method, the authors made this controlled and comparative study between 46 athletes and 43 non-athlete students on the change trends of their cardiac contractility and heart rate. The subjects accomplished a designed exercise workload and the signals of cardiac cycle and cardiac contractility were simultaneously collected and recorded. The increase of the amplitude of the first heart sound after accomplishing the whole exercise workload, with respect to the amplitude of the first heart sound recorded at rest, was defined as cardiac contractility reserve index ( CCRI) while the increase of the amplitude of the first heart sound after accomplishing different exercise workloads was defined as cardiac contractility change trend (CCCT). It was found that after accomplishing one-forth of workload the athletes'CCCT (1/4) was 7. 14 ± 2. 75, heart rate ( HR) was 135 ± 19, and the non - athlete students'CCCT (1/4) was 5. 12 ± 2.05, their heart rate was 130 ± 19. After accomplishing whole exercise workload, athletes'CCCT ( 1 ) was 11. 86 ±3.43, HR was 169 ± 10, and non-athlete students'CCCT (1) was 8. 61 ± 3. 39, HR was 163 ±11. All the Cardiac contractility data showed significant difference ( p < 0. 01 ) between the two sets but just some of the heart rate data showed significant difference (p <0. 05) between the two sets. The results indicate that athlete' s high level cardiac reserve is mainly the reserve of cardiac contractility rather than the reserve of heart rate. There is also a very significant difference of the power and the ratio of cardiac reserve mobilization level to time between athletes and non-athletes, which suggests that athletes can mobilize their cardiac reserve more rapidly than non-athletes.
出处
《体育科学》
CSSCI
北大核心
2003年第1期107-110,共4页
China Sport Science
基金
国家自然科学基金资助项目(30070211)
