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J Appl Physiol (September 20, 2002). doi:10.1152/japplphysiol.00624.2002
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Articles in PresS, published online ahead of print September 20, 2002
J Appl Physiol, 10.1152/jap.00624.2002
Submitted on July 11, 2002
Accepted on September 19, 2002

Duration of coffee- and exercise-induced changes in the fatty acid profile of human serum

Vassilis Mougios1*, Susanne Ring2, Anatoli Petridou1, and Michalis G Nikolaidis1

1 Department of Physical Education and Sports Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
2 Institute of Sport Sciences, University of Salzburg, Salzburg, Austria

* To whom correspondence should be addressed. E-mail: mougios{at}phed.auth.gr.

Prolonged moderate exercise increases the concentration of non-esterified fatty acids (NEFA) and the ratio of unsaturated to saturated (U/S) NEFA in human plasma. The present study examined the duration of these effects and compared them with the effects of coffee ingestion. On separate days and at random order, seven men and six women (i) cycled for 1 h, (ii) ingested coffee containing 5 mg caffeine per kg body mass, (iii) ingested coffee followed by exercise 1 h later, and (iv) did nothing. Blood samples were drawn at 0, 1, 2, 4, 8, 12, and 24 h. Serum was analyzed for lactate, glucose, glycerol, individual NEFA, triacylglycerols, total cholesterol and HDL-cholesterol. Exercise elevated the ratio of U/S NEFA and the percentage of oleate, while decreasing the percentages of palmitate and stearate at the end of exercise, but not subsequently. Consumption of coffee triggered a lower lipolytic response with no alterations in U/S or percentages of individual NEFA. These findings may prove useful in discovering mechanisms mediating the effects of exercise training on the fatty acid profile of human tissues.




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