EA3920, Prognostic Marker and Regulatory Factor of CardioVascular Disease, University of Franche-Comte, Besançon, France.
EA 4660 Culture Sport Health Society and Exercise Performance, Health, Innovation Platform, University of Franche-Comté, Besançon, France.
Int J Sports Med. 2014 Mar;35(3):203-8. doi: 10.1055/s-0033-1345172. Epub 2013 Aug 14.
The development of personalised training programmes is crucial in the management of obesity. We evaluated the ability of 2 heart rate variability analyses to determine ventilatory thresholds (VT) in obese adolescents. 20 adolescents (mean age 14.3±1.6 years and body mass index z-score 4.2±0.1) performed an incremental test to exhaustion before and after a 9-month multidisciplinary management programme. The first (VT1) and second (VT2) ventilatory thresholds were identified by the reference method (gas exchanges). We recorded RR intervals to estimate VT1 and VT2 from heart rate variability using time-domain analysis and time-varying spectral-domain analysis. The coefficient correlations between thresholds were higher with spectral-domain analysis compared to time-domain analysis: Heart rate at VT1: r=0.91 vs. =0.66 and VT2: r=0.91 vs. =0.66; power at VT1: r=0.91 vs. =0.74 and VT2: r=0.93 vs. =0.78; spectral-domain vs. time-domain analysis respectively). No systematic bias in heart rate at VT1 and VT2 with standard deviations <6 bpm were found, confirming that spectral-domain analysis could replace the reference method for the detection of ventilatory thresholds. Furthermore, this technique is sensitive to rehabilitation and re-training, which underlines its utility in clinical practice. This inexpensive and non-invasive tool is promising for prescribing physical activity programs in obese adolescents.
个性化训练方案的发展对于肥胖症的管理至关重要。我们评估了两种心率变异性分析方法在确定肥胖青少年通气阈值（VT）方面的能力。20 名青少年（平均年龄 14.3±1.6 岁，体重指数 z 分数 4.2±0.1）在接受 9 个月多学科管理方案前后进行了递增试验直至力竭。第一（VT1）和第二（VT2）通气阈值通过参考方法（气体交换）确定。我们记录了 RR 间隔，以便使用时域分析和时变频谱域分析从心率变异性中估计 VT1 和 VT2。与时域分析相比，频谱域分析的阈值之间的相关性更高：VT1 的心率：r=0.91 对 r=0.66；VT2 的心率：r=0.91 对 r=0.66；VT1 的功率：r=0.91 对 r=0.74；VT2 的功率：r=0.93 对 r=0.78；分别为频谱域与时域分析）。VT1 和 VT2 的心率没有发现系统偏差，标准偏差<6 bpm，这证实了频谱域分析可以替代参考方法来检测通气阈值。此外，该技术对康复和再训练敏感，这突出了其在临床实践中的实用性。这种廉价且非侵入性的工具有望为肥胖青少年制定体育活动方案。
