Effect of Acute Altitude Exposure on Anaerobic Threshold Assessed by a Novel Electrocardiogram-Based Method.

IF 1.6 4区 医学 Q4 BIOPHYSICS High altitude medicine & biology Pub Date : 2024-03-01 Epub Date: 2024-01-31 DOI:10.1089/ham.2023.0073
Georges Weis, Jenny Schlichtiger, Korbinian Lackermair, Wolfgang Hamm, Dominik Schüttler, Stefan Brunner, Anna Strüven
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Abstract

Background: Acute altitude has a relevant impact on exercise physiology and performance. Therefore, the positive impact on the performance level is utilized as a training strategy in professional as well as recreational athletes. However, ventilatory thresholds (VTs) and lactate thresholds (LTs), as established performance measures, cannot be easily assessed at high altitudes. Therefore, a noninvasive, reliable, and cost-effective method is needed to facilitate and monitor training management at high altitudes. High Alt Med Biol. 25:94-99, 2024. Methods: In a cross-sectional setting, a total of 14 healthy recreational athletes performed a graded cycling exercise test at sea level (Munich, Germany: 512 m/949 mbar) and high altitude (Zugspitze: 2,650 m/715 mbar). Anaerobic thresholds (ATs) were assessed using a novel method based on beat-to-beat repolarization instability (dT) detected by Frank-lead electrocardiogram (ECG) monitoring. The ECG-based ATs (ATdT°) were compared to routine LTs assessed according to Dickhuth and Mader. Results: After acute altitude exposure, a decrease in AT was detected using a novel ECG-based method (ATdT°: 159.80 ± 52.21 W vs. 134.66 ± 34.91 W). AtdT° levels correlated significantly with LTDickhuth and LTMader, at baseline (rDickhuth/AtdT° = 0.979; p < 0.001) (rMader/AtdT° = 0.943; p < 0.001), and at high altitude (rDickhuth/AtdT° = 0.969; p < 0.001) (rMader/AtdT° = 0.942; p < 0.001). Conclusion: Assessment of ATdT is a reliable method to detect performance alterations at altitude. This novel method may facilitate the training management of athletes at high altitudes.

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基于心电图的新方法评估急性高海拔对无氧阈值的影响
背景:急性海拔高度对运动生理学和运动表现有相关影响。因此,对成绩水平的积极影响被专业运动员和休闲运动员用作训练策略。然而,通气阈值(VTs)和乳酸阈值(LTs)作为已确立的成绩衡量标准,在高海拔地区不易评估。因此,需要一种无创、可靠且经济有效的方法来促进和监测高海拔地区的训练管理。方法:在横断面环境下,共有 14 名健康休闲运动员在海平面(德国慕尼黑:512 米/949 毫巴)和高海拔(楚格峰:2650 米/715 毫巴)进行了分级自行车运动测试。无氧阈值(ATs)是根据弗兰克导联心电图(ECG)监测发现的逐次搏动再极化不稳定性(dT),采用一种新方法进行评估的。将基于心电图的有氧阈值(ATdT°)与根据 Dickhuth 和 Mader 评估的常规低氧阈值进行了比较。结果显示急性高原反应后,使用基于心电图的新方法检测到 AT 下降(ATdT°:159.80 ± 52.21 W vs. 134.66 ± 34.91 W)。AtdT° 水平与基线时的 LTDickhuth 和 LTMader 显著相关(rDickhuth/AtdT° = 0.979;p Mader/AtdT° = 0.943;p Dickhuth/AtdT° = 0.969;p Mader/AtdT° = 0.942;p 结论:ATdT 评估是检测高海拔地区成绩变化的可靠方法。这种新方法可能有助于高海拔地区运动员的训练管理。
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来源期刊
High altitude medicine & biology
High altitude medicine & biology 医学-公共卫生、环境卫生与职业卫生
CiteScore
3.80
自引率
9.50%
发文量
44
审稿时长
>12 weeks
期刊介绍: High Altitude Medicine & Biology is the only peer-reviewed journal covering the medical and biological issues that impact human life at high altitudes. The Journal delivers critical findings on the impact of high altitude on lung and heart disease, appetite and weight loss, pulmonary and cerebral edema, hypertension, dehydration, infertility, and other diseases. It covers the full spectrum of high altitude life sciences from pathology to human and animal ecology.
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