Table 1

Comparison between cyclists showing a heart rate deflection point (HRDP) and those who did not

HRDP (n=9)No HRDP (n=7)
Values are expressed as mean (SEM). *Significantly different (p<0.01) from No HRDP group (W); †significantly different (p<0.01) from No HRDP group (%Vo2max).
Vo2max, Maximal oxygen consumption; Wmax, maximal power output (in W); HRmax, maximal heart rate; BLamax, blood lactate at the maximal power output; LT, lactate threshold; OBLA, onset of blood lactate accumulation; RCP, respiratory compensation point; P50, P50 of the oxyhaemoglobin dissociation curve.
Age (years)25 (1)26 (1)
HRDP (beats/min)165 (4)
HRDP (W)350 (15)
HRDP (%Vo2max)85.2 (3.0)
Variables at the maximal power output
    Wmax469 (10)475 (24)
    Vo2max (ml/kg/min)72.7 (1.2)71.4 (1.3)
    HR (beats/min)188 (2)192 (3)
    BLamax (mM)9.0 (0.5)9.0 (0.5)
    pH7.18 (0.02)7.20 (0.03)
    P50 (mm Hg)33.4 (0.7)32.1 (0.7)
    K+ (mM)5.2 (0.1)5.0 (0.2)
LT, OBLA and RCP
    LT (W)283 (11)*279 (13)
    LT (%Vo2max)70.6 (2.9)†68.6 (2.5)
    OBLA (W)367 (12)381 (23)
    OBLA (%Vo2max)87.9 (2.0)86.9 (1.8)
    RCP (W)389 (14)389 (22)
    RCP (%Vo2max)91.6 (2.0)88.2 (1.6)