Held Steffen, Rappelt Ludwig, Wiedenmann Tim, Rommelmann Julius, Gronwald Thomas, Donath Lars
Department of Sport and Management, IST University of Applied Sciences, Duesseldorf, Germany.
Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany.
Eur J Sport Sci. 2025 Oct;25(10):e70054. doi: 10.1002/ejsc.70054.
The concurrent validity of lactate thresholds (LT1, LT2) and between-day reliability data from the rowing-specific heart rate variability (HRV)-based thresholds (HRVT) were examined. Thus, 21 rowers (19.6 ± 2.8 years; 1.78 ± 0.09 m; 72.8 ± 11.3 kg) performed two rowing ergometer step tests (starting 100-150 W; 40-50 W increment/4 min) one week apart. Thirteen participants completed both sessions and were included in the reliability analysis. Reliability of power at first (HRVT1) and second HRVT (HRVT2) revealed low standard error of measurements (SEM: HRVT1 = 12 W; HRVT2 = 6 W), coefficient of variation (CV: HRVT1 = 11.5%; HRVT2 = 5.9%), and good to excellent intraclass coefficient (ICC: HRVT1 = 0.83; HRVT2 = 0.93). HRVT2 revealed a sufficient level of agreement (LoA = 35 W) and practicable low minimal detectable changes (MDC = 16 W). In contrast, LoA (46 W) and MDC (32 W) were notably higher for HRVT1. Furthermore, concurrent validity data showed good to excellent ICC values (0.90), low SEM (7 W) and sufficient LoA (35 W) between HRVT2 and power at LT2. Despite good ICC values (0.78), the SEM (LT1 = 12 W) and LoA (41 W) data were notably higher during HRVT1 versus power at LT1 comparison. Thus, HRVT might be a promising, valid, and reliable option to estimate LT in rowing, with HRVT2 having particularly favorable properties as a surrogate for LT2.
研究了乳酸阈值（LT1、LT2）的同时效度以及基于划船专项心率变异性（HRV）的阈值（HRVT）的日间可靠性数据。因此，21名划船运动员（19.6±2.8岁；身高1.78±0.09米；体重72.8±11.3千克）进行了两次划船测力计阶梯测试（起始功率100 - 150瓦；每4分钟增加40 - 50瓦），间隔一周。13名参与者完成了两次测试并纳入可靠性分析。第一次HRVT（HRVT1）和第二次HRVT（HRVT2）时功率的可靠性显示测量标准误较低（标准误：HRVT1 = 12瓦；HRVT2 = 6瓦），变异系数（CV：HRVT1 = 11.5%；HRVT2 = 5.9%），组内相关系数良好至优秀（ICC：HRVT1 = 0.83；HRVT2 = 0.93）。HRVT2显示出足够的一致性水平（一致性界限[LoA] = 35瓦）和可行的低最小可检测变化（最小可检测变化量[MDC] = 16瓦）。相比之下，HRVT1的LoA（46瓦）和MDC（32瓦）明显更高。此外，同时效度数据显示HRVT2与LT2时的功率之间的ICC值良好至优秀（0.90），标准误较低（7瓦）且一致性水平足够（35瓦）。尽管ICC值良好（0.78），但在HRVT1与LT1时的功率比较中，标准误（LT1 = 12瓦）和LoA（41瓦）数据明显更高。因此，HRVT可能是估计划船运动中LT的一种有前景、有效且可靠的方法，其中HRVT2作为LT2的替代指标具有特别有利的特性。
Zotero 插件