No Effect of Exercise Intensity on Appetite in Highly-Trained Endurance Women.
In endurance-trained men, an acute bout of exercise is shown to suppress post-exercise appetite, yet limited research has examined this response in women. The purpose of this study was to investigate the effect of exercise intensity on appetite and gut hormone responses in endurance-trained women. Highly-trained women (n = 15, 18-40 years, 58.4 ± 6.4 kg, VO2MAX = 55.2 ± 4.3 mL/kg/min) completed isocaloric bouts (500 kcals or 2093 kJ) of moderate-intensity (MIE, 60% VO2MAX) and high-intensity (HIE, 85% VO2MAX) treadmill running at the same time of day, following a similar 48-h diet/exercise period, and at least 1-week apart. Blood was drawn pre-exercise (baseline), immediately post-exercise and every 20-min for the next 60-min. Plasma concentrations of acylated ghrelin, PYY3-36, GLP-1 and subjective appetite ratings via visual analog scale (VAS) were assessed at each time point. Acylated ghrelin decreased (p = 0.014) and PYY3-36 and GLP-1 increased (p = 0.036, p < 0.0001) immediately post-exercise, indicating appetite suppression. VAS ratings of hunger and desire to eat decreased immediately post-exercise (p = 0.0012, p = 0.0031, respectively), also indicating appetite suppression. There were no differences between exercise intensities for appetite hormones or VAS. Similar to males, post-exercise appetite regulatory hormones were altered toward suppression in highly-trained women and independent of energy cost of exercise. Results are important for female athletes striving to optimize nutrition for endurance performance.
Nutrition and Exercise Science, School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR 97331, USA. stephaniemariehowe@gmail.com.
Stephanie M
SM
Howe
Nutrition and Exercise Science, School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR 97331, USA. tarynmhand@gmail.com.
Taryn M
TM
Hand
Department of Family and Consumer Sciences, University of Wyoming, Laramie, WY 82071, USA. enette@uwyo.edu.
D Enette
DE
Larson-Meyer
Department of Family and Consumer Sciences, University of Wyoming, Laramie, WY 82071, USA. KathyAus@uwyo.edu.
Kathleen J
KJ
Austin
Department of Family and Consumer Sciences, University of Wyoming, Laramie, WY 82071, USA. BAlex@uwyo.edu.
Brenda M
BM
Alexander
Nutrition and Exercise Science, School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR 97331, USA. melinda.manore@oregonstate.edu.
Melinda M
MM
Manore
D000293:Adolescent; D000328:Adult; D001069:Appetite Regulation / Q000502:physiology*; D018592:Cross-Over Studies; D004435:Eating; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D010807:Physical Endurance / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology; D055815:Young Adult
appetite-hormones; female athletes; high-intensity exercise; moderate-intensity exercise