Gonçalves Thiago R, Farinatti Paulo de Tarso Veras, Gurgel Jonas L, da Silva Soares Pedro P
1Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil; 2Physical Activity and Health Promotion Laboratory, Physical Education Institute, Rio de Janeiro State University, Rio de Janeiro, Brazil; and 3Research Group on Biomechanics, Physical Education Institute, Fluminense Federal University, Niterói, Brazil.
J Strength Cond Res. 2015 May;29(5):1415-21. doi: 10.1519/JSC.0000000000000769.
Increased heart rate variability (HRV) at rest is frequently associated to maximal oxygen uptake (VO2max), physical activity, and markers of quality of life (QoL). However, the HRV has not been observed during physical exercise or orthostatic (ORT) challenge. This study investigated the associations of HRV changes (ΔHRV) from rest at supine (SUP) to ORT positions with (VO2max), physical activity level, and QoL in young adults. Cardiac autonomic modulation was assessed by spectral analysis of R-R time series measured from SUP to ORT positions in 15 healthy volunteers (26 ± 7 years). Questionnaires were applied for evaluation of QoL (SF-36 score), to estimate (VO2max), and to quantify physical activity (Baecke Sport Score). All HRV indices at SUP, but not ORT, strongly correlated to QoL, estimated (VO2max), and physical activity. The ΔHRV from SUP to ORT showed significant correlations with all questionnaire scores (r = 0.52-0.61 for low frequency and r = -0.61 to -0.65 for high frequency, p ≤ 0.05). Higher vagal activity at rest and greater changes in adrenergic and parasympathetic modulation from SUP to ORT were detected in the volunteers exhibiting higher scores of QoL, estimated (VO2max), and physical activity. Taken together, the level of neural adaptations from resting SUP position to active standing, and physical activity and QoL questionnaires seem to be a simple approach to understand the physiological and lifestyle adaptations to exercise that may be applied to a large sample of subjects in almost any sports facilities at a low cost.
静息时心率变异性（HRV）增加通常与最大摄氧量（VO2max）、身体活动及生活质量（QoL）指标相关。然而，在体育锻炼或直立（ORT）挑战期间尚未观察到HRV情况。本研究调查了年轻成年人从仰卧位（SUP）静息到ORT体位时HRV变化（ΔHRV）与（VO2max）、身体活动水平及QoL之间的关联。通过对15名健康志愿者（26±7岁）从SUP到ORT体位测量的R-R时间序列进行频谱分析来评估心脏自主神经调制。应用问卷评估QoL（SF-36评分）、估计（VO2max）并量化身体活动（贝克体育评分）。SUP时的所有HRV指标，但ORT时并非如此，与QoL、估计的（VO2max）及身体活动密切相关。从SUP到ORT的ΔHRV与所有问卷评分均呈显著相关性（低频r = 0.52 - 0.61，高频r = -0.61至-0.65，p≤0.05）。在QoL、估计的（VO2max）及身体活动得分较高的志愿者中检测到静息时较高的迷走神经活动以及从SUP到ORT时肾上腺素能和副交感神经调制更大的变化。综上所述，从静息的SUP体位到主动站立时神经适应的水平以及身体活动和QoL问卷似乎是一种简单方法，可用于理解对运动的生理和生活方式适应，这可能以低成本应用于几乎任何体育设施中的大量受试者样本。
