Agreement between Ventilatory Threshold, Heart RateVariability Threshold and Conconi Threshold in Runners

Vitor Bertoli Nascimento, Bruno Vinícius Santos, Jhonatan Luiz Soave, Fabiano de Macedo Salgueirosa, Thales Augusto Costa Rosa

OBJECTIVE: To assess the agreement between the ventilatory threshold,  heart rate variability threshold obtained by different parameters and Conconi threshold in runners.
METHODS: The sample consisted of 16 male athletes 26.3 ± 3.9 years, weight 65.2 ± 4.96 kg, height 172 ± 0.07 cm, BMI (kg / m²) 22.2 ± 1.4, 12.0 ± 4.2% fat, oxygen consumption 61.1 ± 2:48 ml / kg / min and vVO2pico 20.0 ± 0.8 km / h. The subjects underwent a maximal incremental treadmill for determination of oxygen consumption (VO2max), ventilatory threshold (VT),  heart rate variability threshold (HRVT) and Conconi threshold (CT).
RESULTS: agreement was observed between the ventilatory threshold and heart rate variability: LiVFCSD1 and LV (p = 0.989, bias = - 0.01km / h, r = 0979, 95% CI = [0940, 0993], p <0.001), and LV LiVFCSD1SD2 (p = 0729, bias = 0.17 km / h, r = 0902, 95% CI = [0735, 0965], p <0.001), and LV HRVT RMSSD (r = 0959,, 95% CI = [0883-0986], p <0.001), LiVFCHF * HF (p = 0.1843, bias = 0.88 km / h, r = 0528, 95% CI = [0.045; 0811]​​, p = 0.035) and lower bias was observed for the parameter SD1. Among LV ane Conconi threshold no agreement was observed but the measures are correlated (p = 0.037, bias = 0.24 km / h, r = 95% 0950 = [0857, 0982], p <0.001).
CONCLUSIONS: For being a low-cost  heart rate variability threshold can be used for monitoring and training prescription for aerobic endurance runners who do not have access to gold standard.