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Table 3 Aerobic exercise capacity results observed among groups

From: Effects of 28 days of beta-alanine and creatine supplementation on muscle carnosine, body composition and exercise performance in recreationally active females

  BA (n = 8) BAC (n = 8) CRE (n = 8) PLA (n =6) Time P value
VO 2peak (ml/kg/min)
 Baseline 41.50 ± 5.60 40.85 ± 6.98 34.20 ± 5.73 35.88 ± 9.65 38.26 ± 7.33 T = 0.54
 1 Week 41.58 ± 5.96 39.89 ± 7.62 36.10 ± 6.04 33.75 ± 10.5 38.10 ± 7.72 G = 0.20
 4 Weeks 41.53 ± 6.12 39.35 ± 6.96 35.34 ± 2.98 37.90 ± 9.03 38.57 ± 6.52 T × Gq = 0.07
 Group 41.53 ± 2.35 40.03 ± 2.35 35.21 ± 2.35 35.84 ± 2.72   
Time to exhaustion (sec)
 Baseline 1,249 ± 210 1,185 ± 303 963 ± 289 1,093 ± 324 1,125 ± 290 T = 0.30
 1 Week 1,294 ± 246 1,196 ± 360 1,020 ± 251 1,032 ± 314 1,142 ± 303 G = 0.24
 4 Weeks 1,293 ± 240 1,173 ± 319 1,046 ± 198 1,083 ± 310 1,153 ± 273 T × Gq = 0.13
 Group 1,279 ± 97 1,185 ± 97 1,010 ± 97 1,069 ± 112   
METS       
 Baseline 11.88 ± 1.60 11.63 ± 2.00 9.79 ± 1.64 10.27 ± 2.77 10.93 ± 2.09 T = 0.56
 1 Week 11.88 ± 1.70 11.41 ± 2.19 10.31 ± 1.74 9.63 ± 3.00 10.89 ± 2.21 G = 0.20
 4 Weeks 11.85 ± 1.74 11.25 ± 1.98 10.09 ± 0.85 10.83 ± 2.54 11.02 ± 1.86 T × Gq = 0.07
 Group 11.87 ± 0.67 11.43 ± 0.67 10.06 ± 0.37 10.24 ± 0.78   
Ventilatory threshold (%VO2peak)
 Baseline 86.81 ± 8.73 86.44 ± 10.73 77.01 ± 6.46 85.75 ± 10.64 83.89 ± 9.68 T < 0.001
 1 Week 84.06 ± 7.34 85.35 ± 10.47 78.61 ± 10.53 84.78 ± 11.03 83.30 ± 9.79 G = 0.44
 4 Weeks 78.59 ± 9.75 78.26 ± 13.02 76.50 ± 11.21 75.30 ± 9.63 77.29 ± 10.58†ǂ T × G = 0.19
 Group 83.15 ± 2.92 83.35 ± 2.92 77.38 ± 2.92 82.29 ± 3.73   
  1. Individual group and time data are presented as means ± SD while time and group effects are presented as means ± SEM. MANOVA analysis revealed overall Wilks’ Lambda time (p < 0.049) and group × time (p = 0.017) effects. Univariate ANOVA p-levels from MANOVA analysis are presented for each variable. BA signifies beta-alanine only group; BAC represents beta-alanine and creatine combined group; CRE represents the creatine only group; PLA represents the placebo group; T represents time p-level; G represents group p-level, and T × G represents interaction. q represents quadratic p-level. † represents p < 0.05 difference from baseline. ǂ represents p < 0.05 difference from 1 week.
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