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

in International Journal of Sport Nutrition and Exercise Metabolism
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  • 1 Charles Sturt University
  • | 2 University of Western Australia
  • | 3 University of New South Wales
  • | 4 Charles Sturt University
  • | 5 University of Technology Sydney
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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∙m2) completed four conditions in a random order: 1) nonexercise 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 appetiterelated peptides and metabolites were assessed before and up to 2 h postcondition (0P, 30P, 60P, 90P, 120P). Perceived appetite did not differ between trials (p < .05). Acylated ghrelin was lower at 0P in AE compared with CON (p = .039), while pancreatic polypeptide (PP) was elevated following AE compared with CON and CE. Glucose-dependent insulinotropic peptide (GIPtotal) was greater following all exercise conditions compared with CON, as was glucagon, although concentrations were generally highest in AE (p < .05). Glucose was acutely increased with SE and AE (p < .05), while insulin and C-peptide were higher after SE compared with all other conditions (p < .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.

The World Health Organization (2014) has reported adipose tissue. Furthermore, there is some preliminary that there are in excess of 1.9 billion overweight adults evidence to suggest that large volumes of adiposity may worldwide. Such extent of obesity is of concern given alter appetite-related hormone concentration, function the numerous health implications resulting from excess and signaling (Batterham et al. 2003a), which could Larsen, Donges, andAdams are with the School of Exercise Sci-Sciences, University of New South Wales, Australia. Duffield ence, Sport & Health, Charles Sturt University, Australia. Guelfi is with the Sport and Exercise Discipline Group, University of is with the School of Human Sciences, University of Western Technology Sydney, Australia.

Address author correspondence Australia, Perth, Australia. Smith is with the School of Medical to Penelope S. Larsen at plarsen@csu.edu.au.