Table 2.  Methodologies for assessing the VO2 kinetic response to heavy and severe intensity exercise in children.

Author

Sex

N

Age (y)

Step change

Sampling interval

Quantification method

 No of transitions

Confidence interval

Robinson (1938)

M
M

8
10

6.0
10.5

Treadmill to exhaustion

30s

% of peak VO2 after 30s

1

  

Mácek and Vavra (1977)

M
M
M
M

10
14
23
6

10
12
15
17

Treadmill to exhaustion

30s

% of peak VO2 after 30s

1

  

Mácek and Vávra (1980)

M

10

10-11

Cycle to exhaustion

30s

% of peak VO2 after 30s

1

  

Sady (1981)

M

21

10.2 (.3)

Cycle - 110% VO2max

15s

t ˝

1

  

Zanconato et al. (1991)

M+F

10

9.0 (1.3)

BL – 50% D
BL – 100% peakVO2
BL – 125% peak VO2

BB

1min t˝

1

  

Armon et al. (1991)

M+F

6

6 – 12

BL – 25% D
BL – 50% D
BL – 75% D

BB

Model 4, δ1 = δ2, t > 0s

1

  

Obert et al. (2000)

M+F

23

10-13

BL – 90% max power

BB

Model 4, t > phase 1

1

  

Williams et al (2001)

M

8

12 (.2)

Rest – 50% D

BB

Model 5, t > 0s

2

  

Hebestreit et al (1998)

M

9

11.1 (1.2)

20W-100% peak VO2
20W – 130% peakVO2

BB

Model 2, t > phase1

2

  

Fawkner and Armstrong (2004c)

M
F

13
9

10.6 (.3)
10.9 (.2)

BL – 40% TVent

BB

Model 2, phase 1 < t <onset of SC

3-4

τ < ± 5s
A1 < ± 5%

Fawkner and Armstrong (2004a)

M
F

25
23

10.6 (.3)
10.7 (.7)

BL – 40% TVent

BB

Model 2, phase 1 < t <onset of SC

3-4

Mean τ , 4.3 ± 1.3s
Mean A1, 3.0 ± 1.3 %
Abbreviations: L = baseline pedalling; D = difference between anaerobic threshold had peak VO2; TVent = ventilatory threshold; τ = time constant; A1 = primary amplitude; for model details see text.