| Moderate altitude (1800 m) | Iron-treated group | Placebo group |
| Total body hemoglobin | decreased | unchanged |
| Venous blood | ||
| * erythropoietin | increased | increased |
| * reticulocytes | increased | increased |
| * parameters of iron metabolism | unchanged | unchanged |
| Maximal oxygen uptake during incremental treadmill test | unchanged | unchanged |