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HRV-Based Thresholds in Rowing: Validity and Reliability Assessment.

Steffen Held1, Ludwig Rappelt2,3, Tim Wiedenmann2

  • 1Department of Sport and Management, IST University of Applied Sciences, Duesseldorf, Germany.

European Journal of Sport Science
|September 9, 2025
PubMed
Summary
This summary is machine-generated.

Heart rate variability-based thresholds (HRVT) show promise for estimating lactate thresholds (LT) in rowers. HRVT2 demonstrates better reliability and validity compared to HRVT1 for assessing LT2.

Keywords:
cardiorespiratory fitnessexercise monitoringperformance metricsphysiological testingpower output

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Cardiovascular Physiology

Background:

  • Lactate thresholds (LT) are crucial for determining endurance performance in rowing.
  • Assessing LT typically involves invasive blood sampling.
  • Heart rate variability (HRV)-based thresholds (HRVT) offer a non-invasive alternative.

Purpose of the Study:

  • To examine the concurrent validity and between-day reliability of rowing-specific HRVT.
  • To compare the performance of HRVT1 and HRVT2 against established lactate thresholds (LT1, LT2).

Main Methods:

  • 21 rowers completed two incremental rowing ergometer tests one week apart.
  • Heart rate variability (HRV) and power output were recorded during tests.
  • Concurrent validity and reliability of HRVT1 and HRVT2 were analyzed against LT1 and LT2.

Main Results:

  • HRVT2 demonstrated good to excellent reliability (ICC=0.93) and low measurement error (SEM=6W, MDC=16W) for assessing LT2.
  • HRVT1 showed lower reliability and higher measurement error for LT1.
  • Concurrent validity was good to excellent for HRVT2 vs. LT2 (ICC=0.90) and sufficient for HRVT1 vs. LT1 (ICC=0.78).

Conclusions:

  • Rowing-specific HRVT is a potentially valid and reliable method for estimating lactate thresholds.
  • HRVT2 is a particularly promising and accurate surrogate for LT2 in rowing.
  • HRVT offers a practical, non-invasive approach to LT assessment in athletes.