Table 2. Blood and running parameters pre and post Live High:Train Low (LHTL) altitude training, Intermittent Hypoxic Exposure (IHE), or Placebo.
LHTL IHE Placebo
Pre Post Pre Post Pre Post
Blood measures
Haemoglobin mass (g) 869 (182) 900 (193) 847 (189) 850 (184) 775 (191) 789 (195)
Serum ferritin (ng·mL-1) 62.8 (33.4) 68.0(27.3) 54.2(27.5) 51.0(23.4) 71.6(46.4) 56.4(36.2)
Soluble transferrin receptor (mg·L-1) 2.5 (.3) 2.9 (.6) 2.7 (.6) 3.2 (.7) 2.4 (.4) 2.8 (.6)
Submaximal running
Running economy (mL·kg-1·min-1) 3.72 (.58) 3.55 (.62) 3.39 (.63) 3.35 (.63) 3.29 (.66) 3.35 (.59)
3mM [La] running speed (km·h-1) 16.8 (.4) 17.1 (.7) 17.0 (1.0) 17.4 (.8) 16.5 (.7) 16.8 (.8)
Maximal running
VO2max (L·min-1) 4.82 (1.1) 4.84 (.89) 4.56 (.87) 4.63 (.79) 4.47 (.65) 4.60 (.72)
vVO2max (km·h-1) 19.3 (.6) 19.6 (.4) 18.9 (1.4) 19.1 (1.3) 19.6 (.9) 19.6 (1.1)
TTE (s) 528 (46) 540 (37) 518 (73) 521 (36) 540 (47) 570 (43)
Maximal heart rate (beats·min-1) 192 (12) 185 (16) 200 (6) 196 (5) 195 (9) 195 (9)
Maximal [La] (mM·L-1) 9.7 (2.0) 8.3 (1.7) 8.8 (1.6) 7.4 (.9) 10.0 (2.4) 10.4 (2.0)
Data presented are the raw values, expressed as group means (± standard deviation). Blood lactate concentration: [La]. Maximal oxygen consumption: VO. Running velocity at VO: vVO. Running time to exhaustion: TTE