论文部分内容阅读
目的:研究骑车运动过程中机体能量消耗和底物代谢特征的性别差异。方法:8名普通男大学生和10名普通女大学生分别以45、55、65、75%VO2max强度进行骑车运动,采用气体代谢法测定机体的能量代谢状况。结果:(1)在45、55、65、75%VO2max 4个强度,男生总能量消耗水平均高于女生。在65%VO2max强度,女生脂肪参与供能的比例为26.49%,高于男生的18.75%(P<0.05);在75%VO2max强度,女生脂肪参与供能的比例为16.46%,高于男生的10.24%(P<0.05)。在相同运动强度(45、55、65、75%VO2max),男生和女生每公斤体重脂肪的氧化量和供能量无显著差异。(2)男、女生以55%VO2max强度骑车脂肪的氧化量和供能量均高于45、65、75%VO2max三个强度。在55%VO2max强度,男生骑车时机体脂肪的氧化量和供能量分别为4.64mg/min/kg和41.75cal/min/kg,女生分别为4.26mg/min/kg和38.38cal/min/kg。结论:(1)在相同运动强度(%VO2max)下,女生脂肪供能比例高于男生;总能量消耗、糖供能比例和糖氧化量均低于男生;每公斤体重脂肪氧化量和供能量无性别差异。(2)促使单位时间内脂肪最大氧化量的骑车强度(%VO2max)无性别差异。
OBJECTIVE: To study the gender differences in body energy expenditure and substrate metabolism during cycling. Methods: Eight ordinary male college students and 10 ordinary female college students were cycled at the intensity of VO2max of 45, 55, 65 and 75%, respectively. The energy metabolism of the body was measured by gas metabolism method. Results: (1) At 45, 55, 65 and 75% VO2max, the total energy expenditure of boys was higher than that of girls. At 65% VO2max intensity, the percentage of female fat participating in energy supply was 26.49%, higher than that of male students (P <0.05). At 75% VO2max intensity, the percentage of female fat participating in energy supply was 16.46% 10.24% (P <0.05). At the same exercise intensity (45, 55, 65, 75% VO2max), there was no significant difference in the amount of oxidized and energized fat per kilo of body weight between boys and girls. (2) The oxidation and energy supply of cycling fat for male and female with 55% VO2max were both higher than those of 45,65 and 75% VO2max. At 55% VO2max, body fat oxidation and energy supply were 4.64 mg / min / kg and 41.75 cal / min / kg for boys and 4.26 mg / min / kg for girls and 38.38 cal / min / kg for girls, respectively . Conclusions: (1) Under the same exercise intensity (% VO2max), the percentage of female fat supply is higher than that of male students; the total energy consumption, the ratio of sugar supply and the amount of sugar oxidation are lower than those of boys; the fat oxidation amount and energy supply per kg body weight No gender differences. (2) there is no gender difference in the cycling strength (% VO2max) that promotes the maximum fat oxidation per unit time.