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Effects of exercise at different times of the day on postprandial lipemia
Author(s) -
Silvestre Ricardo,
Quann Erin E.,
Wood Richard,
Vingren Jakob L.,
Fernandez MariaLuz,
Kraemer William J.,
Volek Jeff S.
Publication year - 2006
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.20.5.lb82-c
Subject(s) - postprandial , medicine , ex vivo , meal , insulin resistance , endocrinology , insulin , area under the curve , treadmill , obesity , zoology , chemistry , biology , biochemistry , in vitro
Twelve healthy and recreationally trained men (age=22.3y+2.5, weight=80.7+12.4, BMI=25.1+3.1, TAG=62.1+24.1mg/dL, glucose=5.12+0.8mmol/L, and insulin=63.4+51.4pmol/L) participated in this study that examined the effects of previous exercise on metabolic and hormonal responses to an oral fat tolerance test (OFTT). Subjects completed three OFTT trials all beginning at 11:00 in a balanced, cross over design that included exercise sixteen hours before the fat load (EX‐16), exercise four hours before (EX‐4) and no‐exercise (NE). Blood was collected before and after the meal, and hourly for six hours. The OFTT consisted of 13 kcal/kg and 1.4 g fat per kg body weight. Dietary intake and exercise was standardized 4 days prior to each intervention. The exercise session consisted of 6 resistance exercises and 30 min of running on a treadmill. There were no statistical significant differences between the two exercise trials. Compared to NE, there was a significant (P<0.05) decrease in TG area under the curve (AUC) during EX‐16 (−26%) and EX‐4 (−15%). Compared to NE, there was decreases in insulin AUC during EX‐16 (−7%) and EX‐4 (−5%) but not significant. Compared to NE, there was a significant decreases in glucose AUC during EX‐16 (−7%) and EX‐4 (−4%). Finally compared to NE, there was a significant increase in nonesterified fatty acid AUC during EX‐16 (11%) and EX‐4 (9%). In summary, exercise decreases postprandial lipemia, but there is no difference when exercising the night before or in the morning preceding a meal rich in fat.