The effect of 13 weeks of running training followed by 9 d of detraining on postprandial lipaemia
The effect of 13 weeks of running training followed by 9 d of detraining on postprandial lipaemia
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DOI：
10.1017/s0007114598001779
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发表时间：
1998-07-01
影响因子：
3.6
通讯作者：
Cairns, CJ
中科院分区：
文献类型：
--
作者：
Herd, SL;Hardman, AE;Cairns, CJ
本研究探讨了训练，随后短期停训，对餐后血脂的影响。14名18-31岁的血脂正常、娱乐活跃的年轻人参加了两个自选组：3名男性和5名女性（BMI 21.7-27.6 kg/m2）完成了13周的跑步训练，之后他们停止锻炼9 d; 3名男性和3名女性（BMI 21.5-25.6 kg/m2）保持他们通常的生活方式。在基线和最后一次脑训练后15 h、60 h和9 d进行口服脂肪耐量试验。在禁食过夜后和进食高脂肪餐（1.2 g脂肪，1.4 g碳水化合物，70.6 kJ能量/kg体重）后间隔6 h采集血样。然后给予肝素（100 IU/kg），并进一步采集血样用于测量血浆脂蛋白脂肪酶（EC 3.1.1.34; LPL）活性。与对照组相比，跑步者的耐力体能有所改善（最大O-2摄取量为+3.2（SE 1.1）ml/kg/min v. -1.3（SE 1.2）ml/kg/min; P < 0.05）。在没有运动的急性效应的情况下，即最后一次训练后60小时，训练对餐后血脂或肝素后LPL活性没有影响。然而，在9天的停训期间，这两个变量的变化在两组之间存在显著差异;在2天不运动后（60小时测试），跑步者的脂血反应比最后一次训练后的早晨高37%（15小时测试;跑步者与对照组P < 0.05），肝素后LPL活性呈相反下降趋势（P < 0.01）。这些研究结果表明，改善健身并不一定赋予餐后血脂高于归因于一个单一的会话的运动的影响。
The present study examined the influence of training, followed by a short period of detraining, on postprandial Lipaemia. Fourteen normolipidaemic, recreationally active young adults aged 18-31 years participated, in two self-selected groups: three men and five women (BMI 21.7-27.6 kg/m(2)) completed 13 weeks of running training, after which they refrained from exercise for 9 d; three men and three women (BMI 21.5-25.6 kg/m(2)) maintained their usual lifestyle. Oral fat tolerance tests were conducted at baseline and again 15 h, 60 h and 9 d after the runners' last braining session. Blood samples were drawn after an overnight fast and at intervals for 6 h after consumption of a high-fat meal (1.2 g fat, 1.4g carbohydrate, 70.6kJ energy/kg body mass). Heparin was then administered (100 IU/kg) and a further blood sample was drawn for measurement of plasma lipoprotein Lipase (EC 3.1.1.34; LPL) activity. Endurance fitness improved in runners, relative to controls (maximal O-2 uptake +3.2 (SE 1.1) ml/kg per min v. -1.3 (SE 1.2) ml/kg per min; P < 0.05). In the absence of the acute effect of exercise, i.e. 60 h after the last training session, there was no effect of training on either postprandial lipaemia or on post-heparin LPL activity. However, changes during 9 d of detraining in both these variables differed significantly between groups; after 2 d without exercise (60 h test), the runners' lipaemic response was 37% higher than it was the morning after their last training session (15 h test; runners v. controls P < 0.05), with a reciprocal decrease in post-heparin LPL activity (P < 0.01). These findings suggest that improved fitness does not necessarily confer an effect on postprandial lipaemia above that attributable to a single session of exercise.