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. 2015 Nov 5;10(11):e0142078. doi: 10.1371/journal.pone.0142078

Table 2. Estimated metabolic responses on the three rounds of taekwondo combat simulation in placebo and caffeine conditions.

Round 1 Round 2 Round 3
CAF PLA CAF PLA CAF PLA
Oxidative
WAER (kJ) 103.2 ± 11.8 b 97.1 ± 7.8 b 117.3 ± 15.2 116.8 ± 15.2 107.5 ± 20.8 b 109.8 ± 16.4 b
Relative (%) 66 ± 6 b 63 ± 5 b 66 ± 6 70 ± 3 65 ± 6 b 64 ± 9 b
ATP-PCr
W [PCR] (kJ) 37.8 ± 10.0 43.4 ± 7.4 43.1 ± 10.2 42.6 ± 8.7 55.3 ± 13.7 a b 54.7 ± 24.2 a b
Relative (%) 24 ± 4 27 ± 3 24 ± 3 26 ± 2 31 ± 4 a b 33± 9 a b
Glycolytic
W[La - ] (kJ) 17.7 ± 9.94 c 13.3 ± 6.9 11.8 ± 7.9 a c 7.5 ± 5.5 a 8.1 ± 4.3 a c 5.8 ± 3.3 a
Relative (%) 10 ± 5 9 ± 5 7 ± 4 a 4 ± 3 a 4 ± 2 a 3 ± 2 a
WTotal (kJ) 158.4 ± 22.7 b 154.2 ± 17.0 b 175.3 ± 26.3 163.9 ± 27.1 173.6 ± 28.0 167.6 ± 38.3

Data are reported as mean and standard deviation. CAF: Caffeine; PLA: Placebo. Waer = estimated oxidative energy, W[La-] = estimated glycolytic energy, WPCR = estimated ATP-PCr energy, WTotal = estimated total metabolic work (WAER + W[La-] + WPCR).

aDifferent than round 1;

bDifferent than round 2;

cDiferent than PLA condition.