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Exercise Prior to a Freely Requested Meal Modifies Pre and Postprandial Glucose Profile, Substrate Oxidation and Sympathovagal Balance by Keyne Charlot; Aurélien Pichon; Didier Chapelot is a Medicine article available to read on EtoBox.

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## Background The effects of exercise on glucose and metabolic events preceding and following a freely initiated meal have never been assessed. Moreover, the relationship between these events and sympathovagal balance is not known. The objective of this study was to determine whether exercise prior to a freely requested meal modifies the pre- and postprandial glucose profile, substrate oxidation and sympathovagal balance. ## Methods Nine young active male subjects consumed a standard breakfast (2298 ± 357 kJ). After 120 min, they either performed 75 min of exercise on a cycle ergometer (EX - 70% VO~2max~) or rested (RT). Lunch was freely requested but eaten __ad libitum__ only during the 1^st^ session, and then energy intake was fixed across conditions. Glucose and sympathovagal balance were assessed continuously using a subcutaneous glucose monitoring system and analysis of heart rate variability, respectively. Every 5 min, a mean value was calculated for both glucose and sympathovagal balance. Substrate oxidation was determined by calculating the gas exchange ratio when lunch was requested and 180 min after the onset of eating. ## Results Preprandial glucose profiles were found i

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Author

Keyne Charlot; Aurélien Pichon; Didier Chapelot

Publisher

BioMed Central; Springer (Biomed Central Ltd.); [London]: BioMed Central, 2004-; Springer Science and Business Media LLC (ISSN 1743-7075)

Published

2011

Language

EN

Field

Medicine (Health Sciences)