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Table 2 Cardioventilatory parameters and load obtained in incremental test

From: Effects of a single dose of beetroot juice on cycling time trial performance at ventilatory thresholds intensity in male triathletes

Variable VT1 VT2 VO2max
Power (W) 195.4 (43.3) 282.1 (37.9) 390.3 (52.8)
VO2 (L·min− 1) 2.2 (0.4) 3.0 (0.3) 3.9 (0.5)
VO2·Kg− 1 (mL·min− 1·Kg− 1) 26.5 (11.9) 42.1 (4.6) 54.8 (3.1)
VCO2 (L·min− 1) 2.1 (0.5) 3.2 (0.4) 4.9 (0.8)
RER 0.9 (0.1) 1.1 (0.0) 1.3 (0.1)
VE (L·min− 1) 56.3 (10.7) 87.7 (14.2) 167.7 (36.5)
VE·VO2− 1 24.7 (2.4) 28.1 (2.0) 41.2 (4.5)
VE·VCO2−1 26.8 (2.1) 26.8 (1.9) 32.3 (2.7)
PetO2 (mmHg) 90.8 (4.2) 95.3 (3.1) 106.6 (2.8)
PetCO2 (mmHg) 32.4 (2.9) 32.4 (2.6) 27.0 (2.4)
HR (beats·sec−1) 120.2 (13.5) 146.3 (13.1) 169.3 (12.8)
Intensity (% of VO2max) 55.8 (10.2) 75.7 (6.6)
  1. Data are provided as mean ± standard deviation (SD) and percentage (%)
  2. Abbreviations: HR heart rate, PETCO2 end-tidal partial pressure of carbon dioxide, PETO2 end-tidal partial pressure of oxygen, RER respiratory exchange ratio, VCO2 carbon dioxide, VE minute ventilation, VE·VCO2− 1 ventilatory equivalent for carbon dioxide, VE·VO2− 1 ventilatory equivalent for oxygen, VO2 oxygen uptake, VO2max maximum oxygen uptake, VT1 first ventilatory threshold, VT2 second ventilatory threshold