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Table 2 Metabolic and performance measures for pre- and post-supplementation

From: High-intensity interval training and β-hydroxy-β-methylbutyric free acid improves aerobic power and metabolic thresholds

  Control (n = 8) PLA-HIIT (n = 13) HMBFA-HIIT (n = 13)
Measure Pretest Posttest Pretest Posttest Pretest Posttest
VO2peak (ml · kg-1 · min-1) 39.1 ± 4.5 38.9 ± 4.0 38.9 ± 3.4 40.3 ± 2.6 39.8 ± 6.7 42.7 ± 5.1
Ppeak (W) 218.8 ± 41.7 215.6 ± 32.6 221.2 ± 46.6 236.5 ± 48.5 226.9 ± 56.3 246.2 ± 54.8
Tmax (min) 12.5 ± 2.9 12.2 ± 2.3 13.0 ± 3.8 14.2 ± 3.7 13.6 ± 4.7 14.9 ± 4.5
RCP (ml · kg-1 · min-1) 30.5 ± 5.0 28.7 ± 2.7 29.3 ± 3.1 31.9 ± 2.2 32.2 ± 4.2 33.7 ± 3.8
PRCP (W) 175.3 ± 38.8 167.0 ± 24.8 168.4 ± 36.0 185.0 ± 33.5 182.6 ± 33.6 196.5 ± 35.1
VT (ml · kg-1 · min-1) 27.7 ± 3.3 27.2 ± 2.7 28.6 ± 3.1 29.0 ± 4.1 27.8 ± 4.8 31.7 ± 3.7
PVT (W) 156.3 ± 17.7 153.1 ± 28.2 159.6 ± 40.2 169.2 ± 37.0 161.5 ± 39.02 184.6 ± 37.6
  1. Values are means ± SD. HIIT, high-intensity interval training; HMBFA, β-hydroxy-β-methylbutyrate in the free acid form (BetaTor™, Metabolic Technologies Inc, Ames, IA); PLA, placebo; VO2peak, peak oxygen uptake; Ppeak, peak power achieved; Tmax, time to exhaustion during graded exercise test; RCP, respiratory-compensation point; VT, ventilatory threshold.