Key result
HRV threshold shows acceptable agreement with ventilatory threshold in young women with ~0.1 km/h bias.
Why the study?
Heart rate variability threshold is a useful alternative to estimate ventilatory threshold, but its validity in women remains underexplored.
Does the heart rate variability threshold (HRVT) agree with the ventilatory threshold (VT) in young women?
Cross-Sectional (n=61)
Does the heart rate variability threshold (HRVT) agree with the ventilatory threshold (VT) in young women?
HRVT assessed via visual and Dmax methods shows acceptable agreement with ventilatory threshold in young women, offering a useful alternative for estimating VT.
HRVT may support noninvasive VT estimation in young women; leaves open validation and generalizability beyond this cross-sectional sample.
The heart rate variability threshold (HRVT) is a useful and inexpensive alternative to estimate the ventilatory threshold (VT). However, its validity in women remains underexplored. We investigated the agreement between HRVT and VT in young women and the influence of cardiac parasympathetic status and cardiorespiratory fitness (CRF). Sixty-one women [Age: 24.5 ± 4.6 years, BMI: 23.4 ± 2.6 kg/m2, V˙O2max: 36.6 ± 6.1 (mL (kg.min)−1)] underwent a maximal exercise test on a treadmill. We assessed HRVT using four methods: HRVTvisual, HRVTDmax, HRVT3ms, HRVT1ms. Low bias and limits of agreement were observed between VT and HRVTvisual [−.1 (−1.5. 1.3) km/h] and HRVTDmax [−.1 (−1.6, 1.4) km/h] methods. Higher limits of agreement were observed for HRVT3ms [.1 (−2.1, 2.1) km/h] and HRVT1ms [.4 (−1.8, 2.7) km/h]. In conclusion, acceptable agreement was observed between VT and HRVT in women, mainly when visual and Dmax methods were used for HRVT assessment.
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Cruz et al. (2021) conducted a cross-sectional in Young women (n=61). Heart rate variability threshold (HRVT) vs. Ventilatory threshold (VT) was evaluated on Agreement between HRVT and VT. Heart rate variability threshold assessment showed acceptable agreement with ventilatory threshold in young women, with low bias for visual (-0.1 km/h) and Dmax (-0.1 km/h) methods.
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