Table 2.

Thigh glycerol kinetics during graded knee extension exercise

	Rest	25% Wmax	65% Wmax	85% Wmax	ANOVA Rest & Ex.	ANOVA Intensity
Femoral arterial glycerol concentration (μmol l−1)	56 ± 5*	100 ± 6#	147 ± 13	147 ± 13	†	‡
Glycerol delivery (μmol min−1)	8 ± 1*	132 ± 13#	264 ± 38	301 ± 37	†	‡
Femoral venous glycerol concentration (μmol l−1)	81 ± 7*	107 ± 7#	155 ± 14	155 ± 13	†	‡
Net thigh glycerol release (μmol min−1)	3.8 ± 1.1	11.2 ± 2.0	9.4 ± 7.5	10.9 ± 6.0
Fractional extraction (%)	21.0 ± 9.8	11.6 ± 3.2	7.9 ± 3.6	10.8 ± 1.7
Thigh glycerol uptake (μmol min−1)	1.4 ± 1.1*	15.1 ± 3.6	24.3 ± 9.7	39.3 ± 8.0$	†	‡
Total glycerol release (μmol min−1)	5.2 ± 1.0*	26.5 ± 3.9	33.7 ± 7.4	50.1 ± 7.8$	†	‡

Tracer data are averaged across the last 15 min of rest, the last 30 min of the initial 45 min of exercise and the last 20 min during the final 35 min of exercise. Other data are averaged across the measurement period. Values are means ± s.e.m.

^*P < 0.05 Rest versus 25, 65 and 85% W_max;

^†ANOVA effect of exercise intensity including rest.

^‡P < 0.05 ANOVA effect of exercise intensity;

^#P < 0.05 25% W_maxversus 65% W_max and 85% W_max;

^$P < 0.05 25% and 65% W_maxversus 85% W_max.