title: Influence of running and walking on hormonal regulators of appetite in women.
abstract: Nine female runners and ten walkers completed a 60 min moderate-intensity (70% VO(2)max) run or walk, or 60 min rest in counterbalanced order. Plasma concentrations of the orexogenic peptide ghrelin, anorexogenic peptides peptide YY (PYY), glucagon-like peptide-1 (GLP-1), and appetite ratings were measured at 30 min interval for 120 min, followed by a free-choice meal. Both orexogenic and anorexogenic peptides were elevated after running, but no changes were observed after walking. Relative energy intake (adjusted for cost of exercise/rest) was negative in the meal following running (-194 ± 206 kcal) versus walking (41 ± 196 kcal) (P = 0.015), although both were suppressed (P < 0.05) compared to rest (299 ± 308 and 284 ± 121 kcal, resp.). The average rate of change in PYY and GLP-1 over time predicted appetite in runners, but only the change in GLP-1 predicted hunger (P = 0.05) in walkers. Results provide evidence that exercise-induced alterations in appetite are likely driven by complex changes in appetite-regulating hormones rather than change in a single gut peptide.
authors.affiliation: Department of Family and Consumer Sciences, University of Wyoming, Laramie, WY 82071, USA.
authors.forename: D Enette
authors.initials: DE
authors.lastname: Larson-Meyer
authors.forename: Sonnie
authors.initials: S
authors.lastname: Palm
authors.forename: Aasthaa
authors.initials: A
authors.lastname: Bansal
authors.forename: Kathleen J
authors.initials: KJ
authors.lastname: Austin
authors.forename: Ann Marie
authors.initials: AM
authors.lastname: Hart
authors.forename: Brenda M
authors.initials: BM
authors.lastname: Alexander