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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


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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