Table 1.
Arterial oxygen saturation (SpO2) and rating of perceived exertion (RPE) measured in team-sport athletes before (SpO2), during, and immediately after performing the RSR444 (4 sets of 4, 4-s sprints) in normoxic (20.9%) and hypoxic (14.5%) conditions. Data are means (±SD).
| Variable | Condition | Baseline | Pre-test | Post-set 1 | Post-set 2 | Post-set 3 | Post-set 4 |
|---|---|---|---|---|---|---|---|
| SpO2 (%) | Normoxia | 97.3 (0.9) | 97.7 (1.0) | 95.0 (3.1) | 95.0 (2.3) | 94.1 (2.4) | 94.2 (1.8) |
| Hypoxia | 98.0 (0.8) | 91.2 (1.8)* | 83.2 (2.9)* | 80.6 (3.2)* | 79.9 (3.7)* | 79.4 (4.0)* | |
| RPE | Normoxia | - | - | 4.4 (1.1) | 5.6 (1.2) | 6.9 (0.9) | 7.9 (1.1) |
| Hypoxia | - | - | 5.0 (1.2) | 6.4 (1.1) | 7.6 (1.2) | 8.4 (0.9) |
*Different from normoxia (p < 0.05). Baseline measurements were obtained in normoxic conditions before the warm up. Pre-test measurements were performed in the environmental condition, after the warm up and immediately before the commencement of the RSR444