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Table 1 Summary of studies investigating the effect of hypoxia on RER during exercise matched for absolute intensity

From: Response: Commentary on the effects of hypoxia on energy substrate use during exercise

StudyParticipantsStudy designType of hypoxiaAltitude (m)Duration of hypoxiaRER
Braun et al. [7]15 (females)30 min cycling at SL (50% SL VO2max) and hypoxia (65% altitude VO2max)TA430010 daysSL: 0.95 ± 0.01 CH: 0.94 ± 0.02
Katz and Sahlin [8]8 (males)5 min exercise at SL (49% SL VO2max) and altitude (67% altitude VO2max)NH450022 minSL: 0.96 ± 0.01 AH: 1.10 ± 0.04
Kelly and Basset [9]7 (males)60 min exercise at SL (69% SL VO2max) and altitude (78% altitude VO2max)NH2750180 minSL: 0.92 ± 0.05 AH: 0.93 ± 0.04
Lundby and Van Hall [10] A8 (male = 6, female = 2)60 min cycling at SL (46% SL VO2max) and at altitude (54% SL VO2max)NH410070 minSL: 0.91 ± 0.01 AH: 0.95 ± 0.02
Lundby and Van Hall [10] B8 (male = 6, female = 2)60 min cycling at SL (46% SL VO2max) and at altitude (59% altitude VO2max)TA410028 daysSL: 0.91 ± 0.01 CH: 0.94 ± 0.01
Péronnet et al. [11]5 (males)80 min cycling at SL (54% SL max) and at altitude (77% altitude VO2max)HH4300110 minSL: 0.92 ± 0.02 AH: 0.97 ± 0.01
Van Hall et al. [12]6 (male = 5, female = 1)20 min cycling at SL (46% SL VO2max) and altitude (82% altitude VO2max)TA562063 daysSL: 0.92 ± 0.02 CH: 0.92 ± 0.01
  1. Values presented as mean ± SD
  2. HH hypobaric hypoxia, NH normobaric hypoxia, TA terrestrial altitude, SL sea level, AH acute hypoxia, CH chronic hypoxia