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为了探讨在渐减负荷运动中不同负荷量对运动后过量氧耗的影响 ,选择了 12名身体健康的体育学部男子大学生 ,在下述不同运动条件下 ,进行功率自行车负荷运动 ,测定吸氧量 (VO2 )、通气量 (VE)、心率 (HR)及血乳酸浓度(La) :(1)通过渐增负荷运动以确定最大功率及最大吸氧量 ;(2 )均以个人最大吸氧量 90 %功率为起点 ,分别进行每分递减 30W、2 0W、10W至 0负荷的 3种不同方式的渐减负荷运动。结果如下 :(1)渐增负荷运动时的最大吸氧量为 2 .81± 0 .12l/min,最大血乳酸浓度为 9.6 5± 1.2mmol/L ;(2 )每分递减 30W的渐减负荷运动时La浓度明显低于每分递减2 0W、10W运动时的值 ;(3)每分递减 10W的运动时VO2 显著高于每分递减 30W、2 0W运动时的值 ;(4)每分递减 30W运动时的VO2 excess与La之间呈低相关 (r=0 .16 7n.s ) ,而每分递减 2 0W和每分递减 10W运动时的VO2 excess与La之间均呈高相关 (2 0W :r=0 .482 ,p <0 .0 5 ;10W :r =0 .76 3,p <0 .0 0 1)。结果表明渐减负荷运动时的递减速度越低 ,其VO2 excess与La浓度相关越密切。
In order to investigate the effect of different load on the excess oxygen consumption after exercise, 12 healthy male undergraduates were selected to carry out power cycling exercise under the following different exercise conditions to determine the oxygen absorption ( VO2, VE, HR and La: (1) The maximum power and maximum oxygen uptake were determined by increasing the exercise load; (2) % Power as the starting point, respectively, for each decrease of 30W, 20W, 10W to 0 load in 3 different ways of decreasing load movement. The results were as follows: (1) The maximum oxygen uptake was 2.81 ± 0.12l / min and the maximum blood lactate concentration was 9.6 ± 1.2mmol / L at increasing load. (2) The decreasing 30W (3) The VO2 was significantly higher than that of 30W and 20W during the exercise with decreasing 10W; (4) The average daily exercise time was There was a low correlation between VO2 excess and La (r = 0.167n.s) at 30W exercise, while there was a high correlation between VO2 excess and La at 20W and 10W (2 0 W: r = 0.482, p <0. 05; 10 W: r = 0 .76 3, p <0 0 0 1). The results show that the lower the rate of decline during load-shedding exercise, the closer its VO2 excess to La concentration.