Table 1.
Steady State Responses during Exercise (Mean ± SD).
| Variable | EX1 | EX2 | ||||
|---|---|---|---|---|---|---|
| CHO | LCHP | HCLP | CHO | LCHP | HCLP | |
| VO2 (mL·kg−1·min−1) | 44 ± 5 | 44 ± 5 | 44 ± 5 | 45 ± 4 | 45 ± 4 | 44 ± 6 |
| VE (L·min−1) | 71 ± 6 | 71 ± 6 | 71 ± 8 | 70 ± 7 | 70 ± 6 | 68 ± 4 |
| RER # | 0.93 ± 0.04 | 0.93 ± 0.03 | 0.92 ± 0.03 | 0.91 ± 0.03 | 0.89 ± 0.03 | 0.91 ± 0.03 |
| HR(bt·min−1) # | 152 ± 10 | 149 ± 10 | 148 ± 11 | 153 ± 10 | 153 ± 8 | 150 ± 9 |
| RPE # | 12.8 ± 1.3 | 12.5 ± 1.6 | 12.8 ± 1.4 | 13.4 ± 1.1 | 12.9 ± 1.7 | 13.1 ± 1.5 |
| Glucose (mg·dL−1) @ | 65.8 ± 9.9 | 66.0 ± 8.7 | 62.2 ± 6.9 | 58.8 ± 9.7 *,^ | 66.9 ± 8.6 | 67.4 ± 6.3 |
| Lactate (mmol·L−1) # | 2.6 ± 1.1 | 2.7 ± 1.0 | 2.7 ± 1.2 | 1.9 ± 0.8 | 1.5 ± 0.7 | 1.9 ± 0.7 |
Note: EX1 conducted prior to ingestion of treatment beverages. Beverages: CHO = carbohydrate; LCHP = low carbohydrate, high protein; HCLP = high carbohydrate, low protein; * = different from LCHP (within EX2), p < 0.05; ^ = different from HCLP (within EX2), p < 0.05; # = main-effect for exercise bout (EX1-EX2), p < 0.05; @ = treatment × exercise bout interaction, p < 0.05.