Schmitt L, Regnard J, Parmentier A L, Mauny F, Mourot L, Coulmy N, Millet G P
National Centre of Nordic-Ski, Research and Performance, Premanon, France.
Université de Franche-comte, Besancon, France.
Int J Sports Med. 2015 Nov;36(12):999-1007. doi: 10.1055/s-0035-1548885. Epub 2015 Aug 7.
This study investigated changes in heart rate variability (HRV) in elite Nordic-skiers to characterize different types of "fatigue" in 27 men and 30 women surveyed from 2004 to 2008. R-R intervals were recorded at rest during 8 min supine (SU) followed by 7 min standing (ST). HRV parameters analysed were powers of low (LF), high (HF) frequencies, (LF+HF) (ms(2)) and heart rate (HR, bpm). In the 1 063 HRV tests performed, 172 corresponded to a "fatigue" state and the first were considered for analysis. 4 types of "fatigue" (F) were identified: 1. F(HF(-)LF(-))SU_ST for 42 tests: decrease in LFSU (- 46%), HFSU (- 70%), LFST (- 43%), HFST (- 53%) and increase in HRSU (+ 15%), HRST (+ 14%). 2. F(LF(+) SULF(-) ST) for 8 tests: increase in LFSU (+ 190%) decrease in LFST (- 84%) and increase in HRST (+ 21%). 3. F(HF(-) SUHF(+) ST) for 6 tests: decrease in HFSU (- 72%) and increase in HFST (+ 501%). 4. F(HF(+) SU) for only 1 test with an increase in HFSU (+ 2161%) and decrease in HRSU (- 15%). Supine and standing HRV patterns were independently modified by "fatigue". 4 "fatigue"-shifted HRV patterns were statistically sorted according to differently paired changes in the 2 postures. This characterization might be useful for further understanding autonomic rearrangements in different "fatigue" conditions.
本研究调查了优秀北欧滑雪运动员的心率变异性（HRV）变化，以描述2004年至2008年期间接受调查的27名男性和30名女性中不同类型的“疲劳”。在仰卧8分钟（SU）和站立7分钟（ST）期间记录静息时的R-R间期。分析的HRV参数包括低频（LF）、高频（HF）功率、（LF+HF）（ms²）和心率（HR，bpm）。在进行的1063次HRV测试中，172次对应“疲劳”状态，首先考虑对这些进行分析。识别出4种“疲劳”（F）类型：1. 42次测试的F(HF(-)LF(-))SU_ST：LFSU降低（-46%）、HFSU降低（-70%）、LFST降低（-43%）、HFST降低（-53%）以及HRSU升高（+15%）、HRST升高（+14%）。2. 8次测试的F(LF(+) SULF(-) ST)：LFSU升高（+190%）、LFST降低（-84%）以及HRST升高（+21%）。3. 6次测试的F(HF(-) SUHF(+) ST)：HFSU降低（-72%）以及HFST升高（+501%）。4. 仅1次测试的F(HF(+) SU)，HFSU升高（+2161%）且HRSU降低（-15%）。仰卧和站立时的HRV模式因“疲劳”而独立改变。根据两种姿势下不同的配对变化，对4种“疲劳”导致的HRV模式进行了统计学分类。这种特征描述可能有助于进一步理解不同“疲劳”条件下的自主神经重排。
