Table 3. Blood lactate concentration [La-] and arterial oxygen saturation (SpO2) measured in team-sport athletes before, 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 |
| [La-] mmol·L-1 |
Normoxia |
1.1(.3) |
2.9 (1.1) |
6.7 (1.5) |
9.1(2.3) |
10.1(2.9) |
10.5 (2.9) |
| Hypoxia |
1.0 (.3) |
3.2 (1.3) |
8.0 (2.1)* |
10.5 (3.0) |
11.2 (2.7) |
11.5 (2.6) |
| SpO2 (%) |
Normoxia |
98.0 (.2) |
97.7 (1.0) |
95.7 (2.9) |
95.7 (2.0) |
94.8 (2.0) |
94.9 (1.2) |
| Hypoxia |
97.9 (.2) |
90.9 (1.4) * |
83.6 (3.0) * |
81.1 (3.4) * |
79.7 (3.7) * |
79.1 (4.0) * |
* 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 prior to the commencement of the RSR
444.
