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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 June;51(2):213-9

Copyright © 1998 EDIZIONI MINERVA MEDICA

language: Italian

Effects of a personalized protocol for the determination of 4 mmol/l threshold

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


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Six young men, active from a physical point of view ( average age: 22.5 years old; average height 177.3 cm; average weight: 74.33 kg), have undergone two personalized incremental tests using a cycle-ergometer: one was a ramping test, the other increased every five minutes; in both, the loads were calculated in percentage at the second ventilatory threshold (Sv2). During the last 30 seconds of every incremental step, samples of capillary arterial blood have been taken. The haematic lactate concentration of 4 mmol/l (OBLA) has been read on the regression polynomial curve representing the lactate/loads relation. The OBLA load had an average of 140.83±33.83 W, the 75% and the 47% of the corresponding ramping test respectively at the Sv2 and at the maximum aerobic power. A constant power test 19% higher than the OBLA one, carried out on the same subjects for a different study, was endured for an average of 58 min and 57 seconds±5.21 with an average haematic lactate concentration of 5.28±1.45 mmol/l. Short lasting incremental protocols with wide steps are unsuitable if you want to obtain tolerable loads at the OBLA in long lasting exercises for the particular lactate kinetic they cause. Personalized protocols that consider the individual capacities, like the ones we used, could much better predict the individual performances and lay out training programmes.

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