Table 1. Arterial oxygen saturation (SpO
2) and rating of perceived exertion (RPE) measured in team-sport athletes before (SpO
2), during, and immediately after performing the RSR
444 (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
