Table 3.
Blood lactate kinetics parameters obtained during the recovery period of the Wingate test in prepubertal children, untrained adults and well-trained adult endurance athletes.
| C | EA | UA | |
|---|---|---|---|
| n = 12 | n = 13 | n = 12 | |
| [La]rest (mmol·L−1) | 1.8 ± 0.6 | 1.8 ± 0.7 | 2.0 ± 0.7 |
| [La](0) (mmol·L−1) | 4.6 ± 1.0 | 5.3 ± 1.8 | 7.0 ± 2.4***,$ |
| A1 (mmol·L−1) | 3.7 ± 1.9 | 8.9 ± 4.7*** | 8.9 ± 2.3** |
| γ1 (min−1) | 0.78 ± 0.33 | 0.73 ± 0.40 | 0.86 ± 0.39 |
| A2 (mmol·L−1) | −7.5 ± 2.2 | −13.6 ± 4.9*** | −15.3 ± 2.2*** |
| γ2 (min−1) | 0.07 ± 0.04 | 0.04 ± 0.01** | 0.02 ± 0.01***,$ |
| [La]pk (mmol·L−1) | 6.6 ± 2.1 | 10.7 ± 2.2*** | 13.9 ± 1.7***,$$$ |
| t[La]pk (min) | 2.5 ± 1.1 | 3.8 ± 1.2* | 4.2 ± 1.8* |
Values are means ± SD. C, children; EA, endurance athletes; UA, untrained adults.
: Significantly different from children at p < 0.05, p < 0.01, and p < 0.001, respectively.
Significantly different from endurance athletes at p < 0.05 and p < 0.001, [La]rest, resting blood lactate concentration; [La](0), blood lactate concentration at end of exercise; A1 and A2 are the amplitudes of the exponential functions, respectively γ1 and γ2 are the velocity constants that describe lactate exchange and removal capacity, [La]pk, peak blood lactate concentration; t[La]pk, time required to reach [La]pk.