Dr. Katy Horner of University College Dublin was on the podcast to discuss her research on gastric emptying, exercise physiology and gut peptide hormones.
Guest Bio
Katy Horner, PhD
Katy joined the School of Public Health, Physiotherapy and Sport Sciences at UCD as a lecturer in Sport and Exercise Science in 2017. Katy holds a BSc and MSc in Sport and Exercise Science, both from the University of Limerick, and a PhD in Exercise and Nutrition Sciences from Queensland University of Technology, Australia. She subsequently completed postdoctoral studies in childhood obesity and physical activity at the Children’s Hospital of Pittsburgh, USA and more recently in the Nutrition, Biomarkers and Health Research Group at UCD as part of Food for Health Ireland.
Her research draws on this interdisciplinary background, particularly in terms of trying to make connections across exercise physiology, metabolism and nutrition science. She has published articles on appetite control, gut and exercise physiology in a range of journals across the fields of sports medicine, exercise science, metabolism, obesity and nutrition. Her interest in applied sport and exercise science centres on nutritional advice and exercise prescription for both athletes to optimise performance and to a wide range of other individuals to optimise wellbeing and metabolic health. Katy is also a trained phlebotomist and registered nutritionist (with specialisms in nutrition science and sport/exercise), and currently works with the Ad Astra elite athlete support team at UCD.
In This Episode We Discuss:
- What you should know about gut peptide hormones (GLP-1, ghrelin, peptide YY)
- Does the dysregulation of appetite hormones drive excess caloric intake and hence excess bodyfat accumulation, or is it excess bodyfat accumulation that drives hormonal dsyregulation?
- The effects of exercise interventions on these appetite-related gut peptides
- Active and inactive men differ in processes of food reward
- Habitual exercise could contribute to weight management by altering processes of food reward via the gut-brain axis
- What is gastic emptying and how do we measure it?
- Do people who exercise compensate for the increase in energy expenditure via compensatory increases in hunger and food intake?
- Implications of gastric emptying on exercise performance
Links & Resources
- Twitter: @katy_horner
- Horner et al., 2016 – Food reward in active compared to inactive men: Roles for gastric emptying and body fat
- Horner et al., 2015 – Acute exercise and gastric emptying: a meta-analysis and implications for appetite control
- Horner et al., 2015 – Influence of habitual physical activity on gastric emptying in healthy males and relationships with body composition and energy expenditure
- Horner et al., 2011 – The effects of weight loss strategies on gastric emptying and appetite control
- King et al., 2012 – Exercise, appetite and weight management: understanding the compensatory responses in eating behaviour and how they contribute to variability in exercise-induced weight loss
- King et al., 2013 – The Interaction Between Exercise, Appetite, and Food Intake: Implications for Weight Control