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Resting Metabolism and Meal‐induced Metabolic Responses in Sedentary and Exercising College‐age Males
Author(s) -
Ratcliff Lance,
Huggins Kevin,
Gropper Sareen,
Shan David
Publication year - 2009
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.23.1_supplement.911.4
Subject(s) - basal metabolic rate , bioelectrical impedance analysis , meal , thermogenesis , fat free mass , medicine , energy expenditure , endocrinology , zoology , body mass index , fat mass , obesity , biology
Differences in resting metabolic rate (RMR) were measured in sedentary and exercising college‐age males, as were their metabolic responses (diet‐induced thermogenesis, DIT) to solid and liquid meals. A group of 9 males was classified as sedentary, 11 as endurance exercisers, and 9 as weight lifters (resistance exercise). RMR was measured soon after waking; DIT for each meal was measured immediately following meal consumption, and then every 30 minutes for 3 hours. RMR and DIT were measured via indirect calorimetry, height was determined via stadiometer, and bioelectrical impedance was used to determine body composition. No significant differences existed between groups for age, body mass index (BMI), percent body fat, fat‐free mass (ffm), percent ffm, or hydration. No significant differences existed in DIT based on meal form (Eta 2 = 0.049, F = 1.336, p = 0.258), nor on exercise group (p = 0.416). However, both exercise groups had a significantly (p < 0.05) greater RMR compared to the sedentary group. There were no significant RMR differences between exercise groups (p = 0.843). RMR and DIT were negatively correlated (r = ‐0.38; p = 0.023). RMR was positively correlated with ffm (r = 0.59; p < 0.001) and BMI (r = 0.39; p = 0.020). These findings further support the importance of exercise, specifically frequent and intense exercise, in amplifying RMR and increasing total energy expenditure.