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MEDICINA DELLO SPORT

A Journal on Sports Medicine


Official Journal of the Italian Sports Medicine Federation
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Medicina dello Sport 1998 September;51(3):307-12

language: Italian

Above-threshold O2 kinetics in prepubertal children. Effects of physical training

Maione D. 1, Senaldi R. 1, Maione A. 1, Mondardini P. 1, Tentoni C. 2, Drago E. 1

1 Istituto di Medicina dello Sport CONI-FMSI di Bologna, Centro Interuniversitario di Studi e Ricerche in Medicina dello Sport, Sede di Bologna;
2 Istituto Superiore di Educazione Fisica Pareggiato di Bologna


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Background and aims. The aim of this study was to check the constant presence of the slow component of V.O2 (cl) in 12 prepubertal children (mean age: 10.7 years; 146.1 cm; 43.1 kg).
Methods. All subjects perfomed an incremental ramping test to identify the loads at the first ventilatory threshold (Sv1) and at V.O2max; 2 tests were then carried out on different days, using constant loads before and after aerobic training with loads calculated as percentages of the difference between V.O2max and SV1 in a wide range. cl was clearly evident in all subjects.
Results. The training programme used in 5 children alone significantly reduced the V.O2/W cost by reducing the breadth of cl.
Conclusions. The authors propose a method for the measurement of the O2 saved based on a calculation of the area between the 2 cost curves V.O2/W before and alter training; this method allows a more accurate evaluation to be made of this relationship.

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