Body position affects the power spectrum of heart rate variability during dynamic exercise
Body position affects the power spectrum of heart rate variability during dynamic exercise
复制标题
身体姿势影响动态运动时心率变异性的功率谱
DOI：
10.1007/bf00235095
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Veicsteinas
中科院分区：
文献类型：
--
作者：
R. Perini;C. Orizio;S. Milesi;L. Biancardi;G. Baselli;A. Veicsteinas
本文用自回归方法对6名男性卧位(S)和坐位(C)静息状态和稳态周期运动时R-R间期变异性(RRV)的功率谱进行了估计，分别为最大耗氧量(%VO2max)的14010%、28%、45%和67%。在两种姿势下，RRV的总功率随着运动强度的增加而呈指数级下降。功率谱可识别出三个成分：第一个高频峰(HF)是呼吸性心律失常的表现，在67%VO2max时，S和C的中心频率(Fcenter)都从0.26 Hz增加到0.42 Hz；第二个与动脉压控制有关的低频峰(LF)，在C中保持不变，在C中保持不变，而在S，超过28%的VO2max下降到0.07 Hz；第三，很低的频率成分(VLF；小于0.05 Hz，没有fcenter)。这三种成分的能量(占总能量的百分比)取决于身体姿势和代谢需求。安静时的HF%S组为30.3%(SEM6.6)%，C组为5.0(SEM0.8)%。在运动中，S组的HF%下降了约30%，C组在28%VO2max时增加到19.7%(SEM5.5)%。安静时S组的LF%低于C组[31.6(SEM5.7)%vs44.9(SEM6.4)%；P<；0.05]，最高可达28%VO2max。在最高强度时，S组增加到54.0(SEM15.6)%，而C组下降到8.5(SEM1.6)%。甚低频代表剩余功率，变化方向与低频相反。运动过程中RRV功率谱分布的变化与运动强度和体位有关。特别是在S任务和C任务中，LF峰表现出相反的趋势，从而提示动脉压控制机制与血液分布和外周阻力的不同重新调整。
SummaryThe power spectrum analysis of R-R interval variability (RRV) has been estimated by means of an autoregressive method in six men in supine (S) and sitting (C) postures at rest and during steady-state cycle exercise at about 14010, 28%, 45%, 67% of the maximal oxygen consumption (% VO2max). The total power of RRV decreased exponentially as a function of exercise intensity in a similar way in both postures. Three components were recognized in the power spectra: firstly, a high frequency peak (HF), an expression of respiratory arrhythmia, the central frequency (fcentral) of which increased in both S and C from a resting value of about 0.26 Hz to 0.42 Hz at 67% VO2max; secondly, a low frequency peak (LF) related to arterial pressure control, the fcentral of which remained constant at 0.1 Hz in C, whereas in S above 28% VO2max decreased to 0.07 Hz; and thirdly, a very low frequency component (VLF; less than 0.05 Hz, no fcentral). The power of the three components (as a percentage of the total power) depended on the body posture and the metabolic demand. HF% at rest was 30.3 (SEM 6.6) % in S and 5.0 (SEM 0.8) % in C. During exercise HF% decreased by about 30% in S and increased to 19.7 (SEM 5.5) % at 28% VO2max in C. LF% was lower in S than in C at rest [31.6 (SEM 5.7) % vs 44.9 (SEM 6.4) %; P<0.05], remaining constant up to 28% VO2max. At the highest intenstities it increased to 54.0 (SEM 15.6) % in S whereas in C it decreased to 8.5 (SEM 1.6) %. VLF represented the remaining power and the change was in the opposite direction to LF. The changes in power spectrum distribution of RRV during exercise depended on the intensity and the body posture. In particular, the LF peak showed opposite trends in S and C tasks, thus suggesting a different readjustment of arterial pressure control mechanisms in relation to the blood distribution and peripheral resistances.
影响因子：
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作者：
POMERANZ, B;MACAULAY, RJB;BENSON, H
通讯作者：
BENSON, H
影响因子：
56.9
作者：
AKSELROD, S;GORDON, D;COHEN, RJ
通讯作者：
COHEN, RJ