December 1, 2006International Journal of Sports Medicine
Assessment of Ventilatory Thresholds from Heart Rate Variability in Well-Trained Subjects during Cycling
Key result
Heart rate variability time-frequency analysis accurately determined ventilatory thresholds in well-trained cyclists, correlating strongly with VT1 (r2=0.94) and VT2 (r2=0.97, p<0.001).
Why the study?
Can ventilatory thresholds be accurately determined from heart rate variability analysis during cycling in well-trained subjects?
Population
11 well-trained subjects
Comparison
Heart rate variability analysis using Short-Term… vs Standard ventilatory thresholds determined from…
Design
Cross-sectional
Authors
Discussion
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Implication
May support non-invasive VT assessment in trained cyclists; extends prior HRV methods but remains hypothesis-generating pending prospective validation.
Study Design
Type
Observational (n=11)
Structured PICO
Can ventilatory thresholds be accurately determined from heart rate variability analysis during cycling in well-trained subjects?
P
Population
11 well-trained subjects
I
Intervention
Heart rate variability (HRV) analysis using Short-Term Fourier Transform to compute high frequency HRV energy (HF) and HF frequency peak (fHF)
C
Comparator
Standard ventilatory thresholds (VT1, VT2) determined from VO2, VCO2, and VE
O
Outcome
Agreement and correlation between HRV-derived thresholds and standard ventilatory thresholdssurrogate
Main Result
Effect estimate: r2 = 0.97
p-value: p=<0.001
Ventilatory thresholds can be accurately determined from RR time series using HRV time-frequency analysis in healthy well-trained subjects, with HF.fHF providing a reliable index.
Cite This Study
Cottin et al. (2006) conducted an observational in Healthy well-trained subjects (n=11). Heart rate variability (HRV) time-frequency analysis vs. Ventilatory equivalents (VO2, VCO2, VE) was evaluated on Ventilatory thresholds (VT1 and VT2) (r2 = 0.97, p=<0.001). Heart rate variability time-frequency analysis accurately determined ventilatory thresholds in well-trained cyclists, correlating strongly with VT1 (r2=0.94) and VT2 (r2=0.97, p<0.001).