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The effect of 13 weeks of running training followed by 9 d of detraining on postprandial lipaemia

Published online by Cambridge University Press:  22 August 2007

Sara L. Herd ,
Adrianne E. Hardman ,
Leslie H. Boobis  and
Caroline J. Cairns
Sara L. Herd
Affiliation:
Department of Physical Education, Sports Science and Recreation Management, Loughborough University, Loughborough, Leicestershire, UK
Adrianne E. Hardman*
Affiliation:
Department of Physical Education, Sports Science and Recreation Management, Loughborough University, Loughborough, Leicestershire, UK
Leslie H. Boobis
Affiliation:
Department of Surgery, Sunderland District General Hospital, Sunderland, Tyne and Wear, UK
Caroline J. Cairns
Affiliation:
Department of Physical Education, Sports Science and Recreation Management, Loughborough University, Loughborough, Leicestershire, UK
*
*Corresponding author: Dr A. E. Hardman, fax +44 (0)1509 223971, email a.e.hardman@lboro.ac.uk
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Abstract

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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/m2) 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/m2) 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 training 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, 1·4 g carbohydrate, 70·6 kJ 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 O2 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.

Keywords

ExercisePostprandial metabolismTriacylglycerols
Type
Research Article
Information
British Journal of Nutrition , Volume 80 , Issue 1 , July 1998 , pp. 57 - 66
Copyright
Copyright © The Nutrition Society 1998

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