背景:长期运动训练可能对心血管功能产生负面影响。中心血流动力学参数的测量和计算可以全面评价心血管功能。这项研究旨在比较年轻篮球运动员和对照组之间的中心血流动力学。
方法:共有19名长期训练的年轻男子篮球运动员和17名匹配的男性娱乐活动对照参加。中心血流动力学参数,如中心血压,脉压,心率(HR),增强指数归一化为75bpm(AIX@HR75),增强指数(AIX),喷射持续时间(ED),测量心内膜下活力比(SEVR),和总外周电阻(TPR),计算每搏输出量(SV)和心输出量(CO).非参数检验和t检验用于分析运动员和对照组之间的中心血液动力学参数。
结果:HR(56±5bpm对79±9bpm,p<.001),AIx@HR75(-8±10%对-1±10%,p<.05),ED(28±2%对36±3%,p<.001)和TPR(0.004±0.006mmHgs/mL与0.012±0.006mmHgs/mL,与对照组相比,篮球运动员的p<.001)显着降低。SEVR(231±32%对159±21%,p<.001)和SV(154±50mL对101±43mL,p<.01)篮球运动员明显高于对照组。然而,中枢血压没有显著差异,脉压,它们之间的AIX和CO。
结论:青少年篮球运动员长期运动训练对中枢血流动力学无负面影响。青少年篮球运动员有较高的心肌灌注,更高的血液供应效率,在此中心血流动力学参数分析中,与对照组相比,血管功能更强,心肌供氧平衡更好。
BACKGROUND: Long-term exercise training may have negative effects on cardiovascular functions. Measurement and calculation of central hemodynamic parameters can comprehensively evaluate the cardiovascular functions. This study aims to compare the central hemodynamics between young basketball athletes and matched controls.
METHODS: Total 19 young long-term trained male basketball athletes and 17 matched male recreationally active controls participated. The central hemodynamic parameters such as central blood pressure, pulse pressure, heart rate (HR), augmentation index normalised to 75 bpm (AIx@HR75), augmentation index (AIx), ejection duration (ED), sub-endocardial viability ratio (SEVR) were measured, and total peripheral resistance (TPR), stroke volume (SV) and cardiac output (CO) were calculated. Non-parameter tests and t-test were used to analyse the central hemodynamic parameters between athletes and controls.
RESULTS: HR (56 ± 5 bpm versus 79 ± 9 bpm, p < .001), AIx@HR75 (-8 ± 10% versus -1 ± 10%, p < .05), ED (28 ± 2% versus 36 ± 3%, p < .001) and TPR (0.004 ± 0.006 mmHg s/mL versus 0.012 ± 0.006 mmHg s/mL, p < .001) were significantly lower in basketball athletes compared to the controls. SEVR (231 ± 32% versus 159 ± 21%, p < .001) and SV (154 ± 50 mL versus 101 ± 43 mL, p < .01) were significantly higher in basketball athletes than those in the controls. However, there were no significant differences in central blood pressure, pulse pressure, AIx and CO between them.
CONCLUSIONS: There is no negative effect on central hemodynamics in young basketball athletes after long-term exercise training. The young basketball athletes have a higher myocardial perfusion, higher efficiency of blood supply, stronger vascular functions and better balance of myocardial oxygen of supply and demand than the controls in this central hemodynamic parameters analysis.