Table 4

Isocapnic buffering and hypocapnic hyperventilation (HHV) ranges in the professional and amateur cyclists studied

Professional
RestPrecompetitionCompetitionAmateur, competition
Values are expressed as means (SD). Vo2 is expressed in ml/kg/min.
*p<0.05,**p<0.01 compared with the rest period in professional cyclists; †p<0.01 compared with the competition period in professional cyclists.
Isocapnic buffering
Vo212.8 (4.3)10.9 (3.6)12.2 (2.6)15.6 (6.8)
W83.0 (17.3)89.5 (20.3)86.0 (20.2)104.1 (32.2)
HHV
Vo28.4 (2.1)9.4 (3.8)7.5 (2.6)13.9 (3.9)†
W101.0 (19.6)87.5 (27.9)*66.0 (21.4)**90.6 (25.8)†