Effects of Aerobic, Strength or Combined Exercise on Perceived Appetite and Appetite-Related Hormones in Inactive Middle-Aged Men.

Publisher:
Human Kinetics
Publication Type:
Journal Article
Citation:
International Journal of Sport Nutrition and Exercise Metabolism, 2017, pp. 1 - 23
Issue Date:
2017-06-28
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Aerobic exercise (AE) and strength exercise (SE) are reported to induce discrete and specific appetite-related responses; however, the effect of combining AE and SE (i.e. combined exercise; CE) remains relatively unknown. Twelve inactive overweight men (age: 48 ± 5 y; BMI: 29.9 ± 1.9 kg·m(2)) completed four conditions in a random order: 1) non-exercise control (CON) (50 min seated rest); 2) AE (50 min cycling; 75% VO2peak); 3) SE (10 × 8 leg extensions; 75% 1RM); and 4) CE (50% SE + 50% AE). Perceived appetite, and appetite-related peptides and metabolites were assessed prior to and up to 2 h post-condition (0P, 30P, 60P, 90P, 120P). Perceived appetite did not differ between trials (p < 0.05). Acylated ghrelin was lower at 0P in AE compared to CON (p = 0.039), while pancreatic polypeptide (PP) was elevated following AE compared to CON and CE. Glucose-dependent insulinotropic peptide (GIPtotal) was greater following all exercise conditions compared to CON, as was glucagon, although concentrations were generally highest in AE (p < 0.05). Glucose was acutely increased with SE and AE (p < 0.05), while insulin and C-peptide were higher after SE compared to all other conditions (p < 0.05). In inactive, middle-aged men AE, SE and CE each have their own distinct effects on circulating appetite-related peptides and metabolites. Despite these differential exercise-induced hormone responses, exercise mode appears to have little effect on perceived appetite compared with a resting control in this population.
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