Table 2.
Mean data for each physiological variable in the Exercise conditions.
| Moderate Exercise | Light Exercise | |||||
|---|---|---|---|---|---|---|
| Caffeine | Control | Placebo | Caffeine | Control | Placebo | |
| VCO2 (ml) | 2185 (92)** | 2189 (79)** | 2211 (89)** | 1420 (72) | 1403 (66) | 1394 (72) |
| VO2 (ml) | 2205 (97)** | 2198 (78)** | 2229 (82)** | 1491 (66) | 1452 (63) | 1483 (68) |
| HR (bpm) | 149 (3)** | 149 (2)** | 150 (2)** | 113 (2) | 117 (2) | 114 (2) |
| RER | 0.99 (0.01)** | 0.99 (0.01)** | 0.99 (0.01)** | 0.95 (0.01) | 0.96 (0.01) | 0.94 (0.01) |
| EqCO2 | 31.1 (0.6)** | 30.6 (0.5)** | 30.8 (06)** | 30.8 (0.4) | 29.6 (0.3) | 29.9 (0.4) |
| EqO2 | 30.9 (0.8)** | 30.5 (0.6)** | 30.5 (0.7)** | 29.2 (0.5) | 28.5 (0.4) | 28.1 (0.5) |
| VE (l/min) | 68.6 (3.7)** | 67.3 (3.0)** | 68.6 (3.5)** | 43.7 (2.3) | 41.7 (2.2) | 41.8 (2.3) |
SD are shown between parentheses. Note. VO2 = oxygen consumption; VCO2 = expired CO2; VE = ventilation per minute; EqO2 = VO2/VE; EqCO2 = VCO2/VE; RER = respiratory exchange ratio. **p < 0.001 from Light Exercise condition.