Table 1. Methodologies for assessing the VO kinetic response to moderate intensity exercise in children.
Author Sex N Age (y) Step change Sampling
interval
Quantification
method
No of transitions Confidence interval Time constant
(σ, s)
Freedson et al. (1981) M 28 10.2 (2.3) BL – 49W 20s 1 34.8 (12.7)
Sady et al. (1983) M 21 10.2 (1.3) BL – 42% VO2 15s 1 18.5 (.75)
Cooper et al. (1984) M
M
F
F
37
21
24
27
10 (2)
16 (1)
9 (2)
15 (2)
Ramp protocol BB MRT from ramp
protocol
1 43 (15)
Cooper et al. (1985) M
F
5
5
8 (1)
9 (1)
Rest – 75% TVent BB Model 1, t > 20s 6 26.5 (3.0)
26.5 (4.0)*
Springer et al. (1991) M+F 9 8.2 (1.4) Rest – 80% TVent BB Model 2, t > 15s 5 23.9 (4.6)
Zanconato et al. (1991) M+F 10 9.0 (1.3) BL – 80% TVent BB 1min t½ 1 23.0 (5.3)
Armon et al. (1991) M+F 6 6 – 12 BL – 80% TVent BB Model 1, t > 0s 1 26 (8)*
Hamar et al. (1991) 18 14.1 (.6) Rest – 65% peak BB Model 2, t > phase1 1 20.2 (5.9)
Hebestreit et al. (1998) M 9 11.1 (1.2) 20W-50% peak VO2 BB Model 2, t > phase1 4 22.8 (5.1)
Obert et al. (2000) M+F 23 10-13 BL – 80% TLac BB Model 4, t > phase 1 1 24.9 (6.6)
Williams et al. (2001) M 8 12.2 (.2) Rest – 80% - TLac BB Model 5 4 10.2 (1.0)
Fawkner and Armstrong (2002b) M
F
11
12
11.6 (.3)
11.7 (.4)
BL – 80% TVent BB Model 1, t > 0s 4-10 𝜏 < ± 5s 29.5 (3.9)**
30.9 (4.5)*
Fawkner and Armstrong (2002b) M
F
11
12
11.6 (.3)
11.7 (.4)
BL – 80% TVent BB Model 1, t > 15s 4-10 𝜏 < ± 5s 29.0 (3.9)**
30.5 (3.9)*
Fawkner and Armstrong (2002b) M
F
11
12
11.6 (.3)
11.7 (.4)
BL – 80% TVent BB Model 2, t > 0s 4-10 𝜏 < ± 5s 25.9 (3.3)**
27.8 4.2)*
Fawkner and Armstrong (2002b) M
F
11
12
11.6 (.3)
11.7 (.4)
BL – 80% TVent BB Model 2, t > 15s 4-10 𝜏 < ± 5s 19.0 ± 2.0**
21.0 ± 5.5*
Abbreviations: BL = baseline pedalling; = ventilatory threshold; TLac = lactate threshold ; 𝜏= time constant