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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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THE EFFECTS OF EXERCISE ON FOOD INTAKE AND HUNGER: RELATIONSHIP WITH ACYLATED GHRELIN AND LEPTIN |
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Serife Vatansever-Ozen1, Gul Tiryaki-Sonmez3  ,
Guler Bugdayci2 and Guclu Ozen1 |
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1School of Physical Education and Sports, and 2Department of Biochemistry, Faculty of Medicine, Abant Izzet Baysal University, Bolu,Turkey, 3Department of Health Sciences, Lehman College, Bronx, New York, USA |
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© Journal of Sports Science and Medicine (2011) 10, 283 - 291 |
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| ABSTRACT | |||
| This study investigated the effects of a long bout of aerobic
exercise on hunger and energy intake and circulating levels of leptin and
acylated ghrelin. Ten healthy male subjects undertook two, 4 h trials in
a randomized crossover design. In the exercise trial subjects ran for 105
min at 50% of maximal oxygen uptake and the last 15 min at 70% of maximal
oxygen uptake followed by a 120 min rest period. In the control trial, subjects
rested for 4 h. Subjects consumed a buffet test meal at 180 min during each
trial. Hunger ratings, acylated ghrelin, leptin, glucose and insulin concentrations
were measured at 0, 1, 2, 3 and 4 h. No differences were found at baseline
values for hunger, acylated ghrelin, leptin, insulin and glucose for both
trials (p > 0.05). The estimated energy expenditure of the exercise trial
was 1550 ± 136 kcal. Exercise did not change subsequent absolute energy
intake, but produced a significant decrease (p < 0.05) in relative energy
intake. A two-way ANOVA revealed a significant (p < 0. 05) interaction
effect for hunger and acylated ghrelin. In conclusion, this exercise regimen
had a positive effect on reducing appetite which is related to reduced acylated
ghrelin responses over time. This finding lends support for a role of exercise
in weight management. Key words: Energy intake, energy expenditure, exercise, hunger, acylated ghrelin, weight loss, appetite. |
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