Table 3.
Aerobic exercise capacity results observed among groups
| 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 | ||
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.