Table 2.

F-values obtained from tests of within-subjects effects from repeated measures on Mb, V̇O2max and ventilatory traits during the course of acclimation (first week not included)

MbaO2maxfaVtVmin OEE
d.f.8,2808,2808,2808,2808,2808,280
H-F epsilon0.591-0.711---
Time1.234 36.040 *** 7.650 *** 19.693 *** 13.328 *** 37.718 ***
Time × sex 2.564 * 0.8210.3200.3290.3630.489
Time × acclimation0.978 33.265 *** 1.281 2.291 * 2.671 ** 3.124 **
Time × acclimation × sex 3.771 ** 1.0230.7490.9061.0811.058
  • f, breathing frequency; Vt, tidal volume; Vmin, minute volume; OEE, oxygen extraction efficiency; d.f., degrees of freedom.

    Sex and acclimation temperature were included as fixed factors. When the sphericity condition was not met (see Materials and methods), P-values were calculated employing H-F corrections (both numerator and denominator d.f. were multiplied by H-F epsilon to obtain corrected d.f.).

    Values in bold indicate statistical significance (α=0.05); * P<0.05; **P<0.01; ***P<0.001.

  • a Non-spherical covariance matrix of contrasts.