Objective To understand the aerobic endurance level, aerobic metabolism ability and cardiovascular function recovery ability of 4 ethnic college students in Xinjiang, and to provide experimental basis for students of different ethnic groups to participate in physical exercise and sports teaching load design.
Methods In September 2018, 80 college students of Uygur, Kazak, Tajik and Han nationalities were randomly selected, and their VO 2max levels were predicted by using a 12 min running test. Blood lactic acid and heart rate levels after exercise were detected by quantitative load exercise, and the correlation among the three was analyzed.
Results Male Tajik students had the highest VO 2max level [ (48.36±4.75) mL (kg· min) −1], and female Uygur students had the highest VO 2max level [ (36.04±4.21) mL (kg· min) −1]. After quantitative load exercise, HRR1 of male Kazak students was higher than that of male Uygur, Kazak and Han students. The blood lactic acid recovery rate of Uygur students was higher than that of Kazak students ( P<0.05), and there was no significant difference between the other groups ( P>0.05). The results of correlation analysis showed that HRR1 was negatively correlated with VO 2max in Uygur, Tajik and Han male students ( r = −0.93, −0.87, P<0.05). There was a negative correlation between HRR1 and VO 2max in Uygur and Han students ( r = −0.88, −0.73, −0.94, P<0.05). There was a positive correlation between blood lactic acid recovery ability and VO 2max level in 4 ethnic college students except Kazak male students (male: r = 0.58, 0.98, 0.77; Female: r = 0.75, 0.89, 0.90, 0.94, P <0.05). Male Uygur, Tajik and Kazak ( r = −0.74, −0.67, −0.81, P<0.05) and female Uygur, Tajik and Han ( r = −0.98, −0.87, −0.73, P< 0.05) HRR1 was negatively correlated with blood lactic acid recovery rate after exercise.
Conclusion There are ethnic and gender differences in the aerobic metabolism, heart rate recovery and lactic acid elimination rate of the four ethnic college students in Xinjiang.
【摘要】 目的 了解新疆4个民族大学生的有氧耐力水平、有氧代谢能力及运动后心血管功能恢复能力，为不同民 族大学生参与体育锻炼及体育教学运动负荷制定提供实验依据。 方法 2018年9月，随机选取80名维吾尔族、哈萨克族、 塔吉克族、汉族4个民族大学生，采用12 min跑测试推测最大摄氧量（VO 2max)水平，采用定量负荷运动检测运动后血乳 酸和心率水平，并分析三者的关联性。 结果 塔吉克族男生VO 2max水平最髙，为[ (48.36±4.75)mL • (kg • min) −1]，女生 组维吾尔族学生VO 2max水平最髙，为[ (36.04±4.21)mL • (kg • min) −1]，定量负荷运动后，哈萨克族男生运动后1 min速 率（HRR1)髙于维吾尔族、哈萨克族及汉族男生，女生组HRR1差异无统计学意义（ P>0.05); 维吾尔族学生血乳酸恢复速 率髙于哈萨克族学生（ P<0.05)。其余各性别及民族组间差异均无统计学意义（ P>0.05); 相关分析结果显示，维吾尔族、塔 吉克族、汉族男生HRR1与VO 2max呈负相关（r值分别为−0.93，−0.73，−0.94， P值均<0.05); 维吾尔族及汉族学生HRR1 与VO 2max呈负相关（ r值分别为−0.88，−0.87， P值均<0.05) ;4个民族大学生血乳酸恢复能力与VO 2max水平除哈萨克族 男生外均呈正相关（男：r值分别为0.58，0.98，0.77;女:r值分别为0.75，0.89，0.90，0.94， P值均<0.05); 维吾尔族、塔吉克 族、哈萨克族男生（ r值分别为−0.74，−0.67，−0.81， P值均<0.05)及维吾尔族、塔吉克族、汉族女生（ r值分别为−0.98，−0. 87，−0.73， P值均<0.05)HRR1与运动后血乳酸恢复速率间呈负相关。 结论 新疆4个民族大学生的有氧代谢能力、心率 恢复及乳酸消除速率存在民族及性别差异，各项指标间可能存在内在关联。