An investigation into the relationship between heart rate variability and the ventilatory threshold in healthy moderately trained males

Abstract

There does not appear to be a relationship present between the VT and the SD1 stabilization point in moderately trained healthy males, whereas the HFp stabilization point revealed a strong relationship with the VT when expressed as heart rate.

Máxima oxidación de grasa mediante variabilidad de la frecuencia cardiaca en sujetos físicamente activos

“…Although this study did not seek to corroborate concordance but rather to analyse the association between HRVT1 and VT1, it must be verified in the intensities of studies since the intention is to replicate the relationships in VT1 or LT and Fatmax. On this point, it coincides with the results of previous studies (Grannell & De Vito, 2017;Karapetian et al, 2008) as no significant differences are found in watts, heart rate and V • O 2 . However, there are only significant correlations in terms of watts and V • O 2 which may be the result of the 5-minute steps which are outside the HRVT1 protocol, where they are from 1 to 3 minutes per step.…”

“…The SD1 average when Fatmax occurred was 5.56 ms, and this average value, in terms of time, precedes the 3 ms reference value for HRVT1 (Grannell & De Vito, 2017;Sales et al, 2011) this coincides with the abovementioned phenomenon when Fatmax is less than VT1 and LT. There are no significant differences (p > .05) in watts in this method, Máxima oxidación de grasa mediante variabilidad de la frecuencia cardiaca en sujetos físicamente activos Maximal Fat Oxidation by Heart Rate Variability in Physically Active Subjects with a correlation of .84 (p < .01) and only one case outside the 95% confidence intervals.…”

“…The SD1 values of the Poincaré plot of the last minute of each step were analysed to determine the first HRV threshold. The criteria were: intensity, where the difference between the values of two consecutive stages is less than 1 millisecond; inflection point less than 3 milliseconds, and/or the combination Máxima oxidación de grasa mediante variabilidad de la frecuencia cardiaca en sujetos físicamente activos Maximal Fat Oxidation by Heart Rate Variability in Physically Active Subjects of the two previous criteria (Sales et al, 2011;Grannell & De Vito, 2017).…”

“…Por lo tanto en este caso si se podría afirmar que el 84.2% del UVFC1 para watts como un método para la identificación del Fatmax, con la salvedad de un sesgo de sobrestimación sistemática de 2.5 W. Por el contrario, este método en frecuencia cardiaca no obtuvo una correlación significativa, por lo tanto se descartaría como un método alternativo independiente de poseer un buen acuerdo y no presentar diferencias significativas con el método de calorimetría indirecta. El promedio de SD1 al ocurrir Fatmax fue de 5.56 ms, este valor promedio se ubica temporalmente antes que el valor de referencia de 3 ms del UVFC1 (Grannell & De Vito, 2017;Sales et al, 2011), esto coincide con el fenómeno ya expuesto como cuando el Fatmax es menor que el VT1 y UL. En este método no se aprecian diferencias significativas (p > .05) en watts, con una…”

“…Heart rate variability (HRV) is a method of estimating the level of SNS and PSNS activity by means of the mathematical analysis of the variations in heartbeat (RR intervals) (Task Force, 1996). There are two thresholds in incremental exercise HRV analysis which separate three exercise stages, and the first heart rate variability threshold (HRVT1) is an alternative method for determining VT1 and LT (Grannell & De Vito, 2017;Karapetian et al, 2008;Sales et al, 2011).…”