Effects of sport activity on risk factor of arteriosclerosis in adolescents.

1.对333名初中生(男生176人，女生157人)进行体育锻炼对动脉粥样硬化危险因素影响的调查。测定体脂率(%FAT)、收缩压(SBP)、舒张压(DBP)、血清高密度脂蛋白胆固醇(HDLC)、总胆固醇(T-C)、动脉粥样硬化指数(AI)，每年1次，连续3年。根据学生在体育俱乐部参加体育锻炼的比例(分别为50%和50%)，从问卷中将学生分为不活跃组(24名男生，32名女生)和积极组(115名男生，109名女生)。研究结果如下：(1)第1年，非活动组与活动组各危险因素差异无统计学意义。(2)2年级时，活动男童组的舒张压、T-C、AI显著低于不活跃男童组，TAT百分比低于不活跃男童组，但S…无显著差异更具统计意义的是。活跃女童组的舒张压显著低于非活跃女童组。(3)在第三年，当所有学生在考试前3个月停止参加体育活动时，活动组和非活动组之间的任何危险因素都没有显著差异。我们的结论是，规律的运动可能对青少年的动脉硬化危险因素有抑制作用，而保持规律的运动习惯对于延长这一时期非常重要。通过测量32名初中男生(22名运动男生和10名非运动男生)的纵向脉搏波速度(APWY)来评价运动对主动脉弹性的影响，APWY随主动脉杨氏模数的增加而增加，连续3年。在第2年和第3年，运动组的身体素质水平高于非运动组。然而，APWV在这三年中没有显示出两组之间的任何差异。运动对年轻一代的主动脉弹性的影响可能不明显，或需要更长的观察期。较少

1. The effects of the sport activity on the aeteriosclerotic risk factors were investigated in 333 junior high school students(176 boys and 157 girls). The body fat ratio(%fat), the systolic blood pressure(SBP), the diastolic blood pressure(DBP), the serum high density lipoprotein cholesterol(HDL-C)and total cholesterol(T-C)levels, and atherosenic index(AI)were evaluated, once a year for three years. The students were divided into inactive groups(24 boys, 32 girls)and active groups(115 boys, 109 girls)from the questionnaires, based 'on the attendance rate at sport practice in some sport club(50%<, 50%<greater than or equal>, respectively). The results were as follows : (1)In the 1st year, there was no significant difference in any risk factor between the inactive and active groups. (2)In the 2nd year, DBP, T-C, AI were significantly lower in the active boy group than in the inactive boy group, and %tat was lower in the active boy group compared with the inactive boy group, though not s … More tatistically significantly. DBP were significantly lower in the active girl group than in the inactive girl group. (3)In the 3rd year, when all students have discontinued the sport activity 3 months before the examination, there was no significant difference in any risk factor between the active and inactive groups. We conclude that the regular exercise may have suppressive effects on the arteriosclerotic risk factors in adolescents, and the continuation of a regular exercise habit is important to prolong the2. The effect of the sport activity on the aortic elasticity was evaluated by measuring the aortic pulse wave velocity(APWY), which is to be increased with increasing the aortic Youngs's modulus, longitudinally in 32 junior high school boy students, who consisted of 22 active boys and 10 inactive boys, once a year for three years. The physical fitness level of the active groups was higher than that of the inactive group in the 2nd and 3rd year. The APWV, however, did not show any difference between the-two groups through the three years. The effect of sport activity on the aortic elasticity might not be obvious in the younger generation, or a longer observation period should be necessary. Less