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
(δ, s) |
| Freedson et al. (1981) |
M |
28 |
10.2 (2.3) |
BL – 49W |
20s |
t½ |
1 |
|
34.8 (12.7) |
| Sady et al. (1983) |
M |
21 |
10.2 (1.3) |
BL – 42% VO2 |
15s |
t½ |
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 |
Ï„ < ± 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 |
Ï„ < ± 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 |
Ï„ < ± 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 |
Ï„ < ± 5s |
19.0 ± 2.0**
21.0 ± 5.5* |
|
Abbreviations: BL = baseline pedalling; = ventilatory threshold; TLac = lactate threshold ; Ï„= time constant |
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