其他摘要：The interval training on the distance of 400 meters is very popular in Portugal. However, it is verified that the available literature on this theme is neither elucidating nor concordant on which the percentage of request of oxygen consumption and of energy (aerobic and anaerobic) during these training sessions. For this fact, the present work is the study has the purpose of evaluating the requests at the level of the aerobic (EnAer) and anaerobic (EnAna) energy and the percentage of the oxygen consumption in the sessions of interval training of 11X400 meters accomplished to 101% of the speed associated to the maximum consumption of oxygen (vVO2máx) (79 second), 7X400 meters to 104.5% of vVO2máx (76.4 second) and 5X400 meters to 108% of vVO2máx (74.2 second) with an interval of 70 second. The study intends to quantify the energy requested in the repetitions and the percentage of the VO2máx during repetitions and pauses. The subject used in this study was a female, 23 years old, athlete of middle-distance at the national level (9.46 min 3.000 meters and 16.47 min 5.000 m), with maximum oxygen consumption of 68.92 ml/kg/min. The athlete accomplished a sub-maximum test of 5 repetitions from 5 to 6 minutes each, in order to check the standard values at the level of the oxygen consumption (VO2máx). The supra-maximum test was performed at 111% of vVO2máx, in order to evaluate the anaerobic capacity, through the quantification of the deficit of accumulated oxygen (DefO2Ac), and the respective sessions of interval training. The ventilatory parameters were controlled in the tests and in the training sessions through the gases analyzer Cosmed K4b2. The data of the tests, after treatment, was the following: O2máx, 68.92 ml/kg/min; v O2máx, 5.01 m/s (3.19 min/km); DefO2Ac, 51.73 ml eqO2/kg. The data of the training sessions was the following: 11X400 meters, 81% of EnAer, 19% of EnAna, 82% of VO2máx in the repetitions and 66% of VO2máx in the pauses; 7X400 meters, 80% of EnAer, 20% of EnAna and 84% of O2máx in the repetitions and 68% of VO2máx in the; 5X400 meters, 79% of EnAer, 21% of EnAna, 85% of VO2máx in the repetitions and 70% of VO2máx in the pauses. The data concerning the requested EnAna and the percentage of VO2máx showed any significant differences. The highest values were observed in the training session 5X400 meters, accomplished to 108% of the vVO2máx, whereas 70% of request of VO2máx was reached in the pauses and 85% of request of VO2máx in the repetitions, with the average in the session of 78% of VO2máx. In this session 21% of the energy requested was anaerobic and 79% was aerobic. The results regarding all training sessions show a low request of the percentage of VO2máx and, consequently, a low contribution of the anaerobic energy. These results seem to demonstrate that the interval training of 400 meters, with pauses of 70 second, neither request the maximum potency of the aerobic system nor the anaerobic capacity. However, these sessions seem to request the s threshold identified as the aerobic capacity.
