Journal of Sports Science and Medicine

Table 2. Oxygen uptake kinetic parameters during moderate- and heavy intensity exercise (mean ± SD).

	Youth		Adults
	Moderate	Heavy	Moderate	Heavy
Baseline Ì‡VO₂ (mL·min^-1)	1180 ± 137	1251 ± 119^$	1474 ± 282*	1522 ± 225*
Phase II Ì‡VO₂ time constant (s)	24.1 ± 7.0	31.8 ± 5.6^$	22.7 ± 5.6	28.6 ± 5.7^$
Phase II Ì‡VO₂ time delay (s)	9.3 ± 5.3	7.4 ± 3.1	12.5 ± 8.5	9.6 ± 4.2
MRT Ì‡VO₂ (s)	33.4 ± 5.6	39.2 ± 3.9^$	35.2 ± 10.5	38.2 ± 6.0
Phase II Ì‡VO₂ amplitude (mL·min^-1)	708 ± 258	1659 ± 464^$	996 ± 358	2032 ± 622^$
Phase II Ì‡VO₂ gain (mL·min^-1.W^-1)	10.1 ± 1.9	11.6 ± 3.5	8.0 ± 1.5*	8.0 ± 1.0*
Ì‡VO₂ slow component (mL)		78 ± 47		482 ± 314*
End-exercise Ì‡VO₂ (mL·min^-1)	1886 ± 375	2990 ± 561^$	2513 ± 536*	4035 ± 984^$*
End-exercise Ì‡VO₂ gain (mL·min^-1.W^-1)	10.0 ± 2.2	12.1 ± 3.6	8.4 ± 1.8*	9.8 ± 1.4^$*

Significance values determined from Fisher’s LSD post-hoc test.

* p < 0.05 between the groups,

^$ p < 0.05 between the intensities.