Influence of habitual physical activity on gastric emptying in healthy males and relationships with body composition and energy expenditure

Horner, Katy M., Byrne, Nuala M., Cleghorn, Geoffrey J., & King, Neil A. (2015) Influence of habitual physical activity on gastric emptying in healthy males and relationships with body composition and energy expenditure. British Journal of Nutrition, 114(3), pp. 489-496.

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Although a number of studies have examined the role of gastric emptying (GE) in obesity, the influences of habitual physical activity level, body composition and energy expenditure (EE) on GE have received very little consideration. In this study, we have compared GE in active and inactive males, and we have characterised relationships with body composition (fat and fat free mass) and EE. Forty-four males (Active: n=22, Inactive: n=22; range BMI 21-36kg/m2; range percent fat mass 9-42%) were studied, with GE of a standardised (1676 kJ) pancake meal being assessed by 13C-octanoic acid breath test, body composition by air displacement plethysmography, resting metabolic rate (RMR) by indirect calorimetry and activity EE (AEE) by accelerometry. Results showed that GE was faster in active compared to inactive males (mean ±SD half time (t1/2): Active: 157±18 and Inactive: 179±21 min, p<0.001). When data from both groups were pooled, GE t1/2 was associated with percent fat mass (r=0.39, p<0.01) and AEE (r =-0.46, p<0.01). After controlling for habitual physical activity status, the association between AEE and GE remained, but not that for percent fat mass and GE. BMI and RMR were not associated with GE. In summary, faster GE is considered to be a marker of a habitually active lifestyle in males, and is associated with a higher AEE and lower percent fat mass. The possibility that GE contributes to a gross physiological regulation (or dysregulation) of food intake with physical activity level deserves further investigation.

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ID Code: 85652
Item Type: Journal Article
Refereed: Yes
Keywords: Body composition; Energy expenditure; Gastric emptying; Physical activity
DOI: 10.1017/S0007114515002044
ISSN: 1475-2662
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: Copyright 2015 The Author(s)
Deposited On: 16 Jul 2015 22:40
Last Modified: 25 Sep 2015 04:53

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