Table 1.

Muscle blood flow (), arterio-venous O₂ difference (a–v O₂ diff) and oxygen uptake () kinetics variables for 6 min bouts of low-intensity (LI) and high-intensity (HI) knee-extensor exercise

	Low intensity			High intensity
	(l min−1)	a–v O2 diff (ml l−1)	(ml min−1)	(l min−1)	a–v O2 diff (ml l−1)	(ml min−1)
Baseline values	1.08 ± 0.08	47 ± 8	48 ± 6	1.52 ± 0.11	43 ± 7	46 ± 8
Td (s)	−1 ± 2	8 ± 1	4 ± 1	1 ± 1	5 ± 0	4 ± 1
Tau (s)	19 ± 4	21 ± 3	26 ± 3	26 ± 5	12 ± 3$*#	25 ± 4
Amplitude	2.06 ± 0.29	70 ± 6	327 ± 32	4.32 ± 0.47#	89 ± 5	687 ± 55#
MRTp (s)	18 ± 4*	28 ± 4	30 ± 4	27 ± 5	17 ± 3$*#	29 ± 4
6–2 min	0.07 ± 0.09	5 ± 2	32 ± 8	0.47 ± 0.19#	11 ± 3	112 ± 21#
End exercise	3.20 ± 0.3	117 ± 5	375 ± 37	6.05 ± 0.59#	132 ± 6#	790 ± 61#
MRTt (s)	16 ± 4*	35 ± 5	34 ± 4	31 ± 7	21 ± 3	37 ± 5

Data are presented as means ± SEM. Td, time delay; MRT_p, mean response time for the fundamental phase of the response; 6–2 min, the difference in between 6 min and 2 min of exercise; MRT_t, mean response time for the entire response; End exercise, end-exercise value for . *Significantly different from . ^$Significantly different from . ^#Significantly different from LI.