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Postprandial glucose and insulin responses to a postexercise grain meal
Author(s) -
LAWRENCE A. C. St.,
LAWRENCE L. M.,
COLEMAN R. J.
Publication year - 2002
Publication title -
equine veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 87
eISSN - 2042-3306
pISSN - 0425-1644
DOI - 10.1111/j.2042-3306.2002.tb05394.x
Subject(s) - postprandial , meal , medicine , insulin , endocrinology
Summary Many studies have examined the effect of pre‐exercise feeding on glucose and insulin responses of horses. The objective of this study was to determine whether exercise performed one hour prior to a meal would attenuate the glucose and insulin responses to a meal. Data collected from 8 mature geldings in a 2 period crossover design experiment were used to determine the postprandial glucose and insulin responses to a meal of oats offered 1 h postexercise. During each period, 4 horses received a test meal following a 14 h fast (NoEx) or a 14 h fast and exercise bout (PostEx) that consisted of 48 min walking and trotting. Blood samples were collected before and at 30 min intervals for 5 h after the meal was offered. Glucose and insulin concentrations were similar between treatments at all time points (P>0.15). Postprandial glucose and insulin concentrations increased at similar rates in both groups from 0 to 90 min. Peak glucose and insulin concentrations and area under the response curves were similar between treatment groups. Glucose:insulin was not different between treatment groups at any time point before or after the meal (P>0.17). Overall, the 48 min of light work performed 1 h before a meal did not affect glucose or insulin responses to the meal. A one hour interval after mild exercise appears to be sufficient to allow normal glucose metabolism of a grain meal.