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Table 3 Peak values during the CLT at CP for V O 2 , V CO2, RER and HR on the first and fifth day of testing with either NaHCO 3 or placebo supplementation

From: Multiday acute sodium bicarbonate intake improves endurance capacity and reduces acidosis in men

  NaHCO3 Placebo
  Day 1 Day 5 Day 1 Day 5
V O2,CLT 4.64 ± 0.39 4.66 ± 0.30 4.59 ± 0.37 4.64 ± 0.47
V CO2,CLT 4.63 ± 0.47 4.67 ± 0.19 4.58 ± 0.36 4.59 ± 0.40
RERCLT 1.07 ± 0.04 1.08 ± 0.05 1.03 ± 0.05 1.05 ± 0.05
HRCLT 177.4 ± 8.5 172.8 ± 9.0** 176.3 ± 7.8 173.8 ± 8.6**
  1. Values are mean ± SD (n = 8). CLT, constant-load trials; CP, ‘Critical Power’; V O2, oxygen uptake; V CO2 carbon dioxide output; RER, respiratory exchange ratio; HR, heart rate. ** P < 0.01 relative to day 1.