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. 2019 May 28;10:650. doi: 10.3389/fphys.2019.00650

Table 1.

Ergospirometry data (peak values) during the laboratory assessments, before and after the combined (high-interval training HIIT + resistance training) exercise program.

Variables Pretraining Posttraining (3 months) % Change (from pretraining to 3rd month of training) Posttraining (6 months) % Change (from pretraining to 6th month of training)
Test duration 13 min 45 s 23 min 40 s +72.1 23 min 38 s +71.9
VO2peak (ml⋅kg−1⋅min−1) 11.6 19.9 +70.7 22.3 +90.2
VO2peak (ml⋅min−1) 846 1441 +70.3 1610 +90.3
VCO2 (ml⋅min−1) 932 2,235 +139.3 1,714 +83.9
VE (ml⋅min−1) 27.3 73.5 +169.2 81 +196.7
VE/VO2 32 51 +59.4 50 +56.3
RER 1.10 1.55 +40.9 1.06 −3.6
HR (beats⋅min−1) 144 182 +26.4 180 +25
% HRmax 73 92 +26.0 91 +24.7
Power output (watts) 70 120 +71.4 120 +71.4

Completed only 40 s of the last step. HR, heart rate; HRmax, age-predicted maximum heart rate (220 minus age, in years); RER respiratory exchange ratio; VCO2 carbon dioxide production; VE, ventilation; VE/VO2 ventilatory equivalent for oxygen; VO2peak, peak oxygen uptake.