Table 2.
Detailed dietary intake for participants.
| SL, weight maintenance |
HA, energy deficit |
|||
|---|---|---|---|---|
| CHO | PLA | CHO | PLA | |
| Absolute intake (kcal/d or g/d) | ||||
| Energy | 2535 ± 485 | 2295 ± 333 | 2002 ± 230 | 1856 ± 231 |
| Protein | 92 ± 18 | 83 ± 18 | 134 ± 48 | 108 ± 31 |
| Carbohydrate | 339 ± 80 | 293 ± 62 | 238 ± 28 | 207 ± 26 |
| Fat | 92 ± 23 | 90 ± 17 | 62 ± 20 | 71 ± 20 |
| Relative intake (kcal/kg body mass/d or g/kg body mass/d) | ||||
| Energy | 31.5 ± 7.1 | 28.4 ± 6.5 | 26.1 ± 2.4 | 23.9 ± 2.3 |
| Protein | 1.2 ± 0.4 | 1.0 ± 0.1 | 1.7 ± 0.5 | 1.4 ± 0.5 |
| Carbohydrate | 4.2 ± 1.1 | 3.7 ± 0.3 | 3.1 ± 0.3 | 2.7 ± 0.2∗ |
| Fat | 1.1 ± 0.3 | 1.1 ± 0.2 | 0.8 ± 0.3 | 0.9 ± 0.2 |
| Percent energy intake (%) | ||||
| Protein | 15 ± 2 | 15 ± 4 | 27 ± 9 | 23 ± 7 |
| Carbohydrate | 53 ± 5 | 51 ± 7 | 48 ± 1 | 45 ± 1∗ |
| Fat | 32 ± 3 | 35 ± 4 | 28 ± 9 | 34 ± 8 |
Values are mean ± SD for absolute (kcal/d, g/d), relative (kcal/kg body mass/d, g/kg body mass/d), and percent (%) energy intake; CHO participants (n = 8) ingested 1.8 g carbohydrate/min (65.25 g fructose + 79.75 g glucose) and PLA participants (n = 6) ingested placebo during steady-state exercise trials at sea level (SL) and high-altitude (HA). Participants in the CHO and PLA groups were further randomized to standard (1.0 g/kg/d) and higher (2.0 g/kg/d) protein diets beginning on day 2 at HA. Protein intake did not influence any study outcome; thus, dietary data are presented for CHO and PLA only. ∗Different (P < 0.05) from CHO during HA.