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The Journal of Sports Medicine and Physical Fitness 2004 March;44(1):23-9

lingua: Inglese

Effect of moderate exercise on excess post-exercise oxygen consumption and catecholamines in young women

Imamura H. 1, Shibuya S. 1, Uchida K. 2, Teshima K. 1, Masuda R. 1, Miyamoto N. 1

1 Labor­a­tory of Nutri­tion and Exer­cise Phys­iology Depart­ment of ­Food and Nutri­tion Nak­a­mura ­Gakuen Uni­ver­sity, ­Fukuoka, ­Japan
2 Depart­ment of ­Food and Nutri­tion Nak­a­mura ­Gakuen ­Junion Col­lege, ­Fukuoka, ­Japan


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Aim. The pur­pose of ­this ­study was to ­examine the ­effects of mod­erate exer­cise on the mag­ni­tude and dura­tion of ­excess ­post-exer­cise ­oxygen con­sump­tion (­EPOC) and cat­e­chol­a­mine con­cen­tra­tions in 7 ­young ­women.
­Methods. The sub­jects per­formed 30 or 60 min­utes of exer­cise (30-ME and 60-ME, respec­tively) on sep­arate ­days at an inten­sity of 60% of max­imal ­oxygen ­uptake on a ­cycle ergom­eter. The glu­cose, epi­neph­rine and nor­epi­neph­rine in the ­plasma, and ­free ­fatty ­acids and ­glycerol in the ­serum ­were meas­ured at the end of the 60 min of the ­rest ­period ­before ­each exer­cise, imme­di­ately ­after the per­for­mance of ­each exer­cise and 30 min, 1, 2 and 24 h ­time ­points ­after ­each exer­cise.
­Results. ­EPOC ­lasted for 46.1±25.4 and 116.1±79.8 min ­after the 30- and 60-ME, respec­tively. Cor­re­sponding ­total ­EPOC ­were 2636±1125 and 5208±1880 ml, respec­tively. The ­mean dif­fer­ences ­were sta­tis­ti­cally sig­nif­i­cant (p<0.05 ­each). The ­serum ­free ­fatty ­acids sig­nif­i­cantly ­increased imme­di­ately ­after the 60-ME. The ­serum ­glycerol was sig­nif­i­cantly ­increased imme­di­ately ­after the 30-ME and was ­also sig­nif­i­cantly ­increased imme­di­ately ­after and 30 min ­time ­point ­after the 60-ME. The ­plasma epi­neph­rine and nor­epi­neph­rine sig­nif­i­cantly ­increased imme­di­ately ­after the 30- and 60-ME, respec­tively. The ­plasma epi­neph­rine at the 30 min ­time ­point ­after the 60-ME sig­nif­i­cantly cor­re­lated ­with the mag­ni­tude (r=0.955) and dura­tion (r=0.897) of ­EPOC. Nor­epi­neph­rine at the 30 min ­time ­point ­after the 60-ME ­also sig­nif­i­cantly cor­re­lated ­with the mag­ni­tude (r=0.774) of ­EPOC.
Con­clu­sion. The ­results indi­cate ­that ­longer dura­tion exer­cise ­results in a ­greater and ­longer ­EPOC, and the ­plasma cat­e­chol­a­mines may pos­sibly con­tribute to ­EPOC in ­young ­women. ­Although, the ­overall mag­ni­tude of ­EPOC is ­small, if exer­cise fre­quency and com­pli­ance are ­strong, ­some ­long ­term ben­e­fits may ­accrue.

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