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Abstract #4020

Investigating The Effects of The Menstrual Cycle on Glycogen Utilisation and Metabolic Activity During Exercise: A 13C MRS Study

Stephen Bawden1,2, Louise Dexter2, Mehri Kaviani2, Sarah Wolfe2, Jane Grove1, Penny Gowland2, Guruprasad P Aithal1, and Tomoka Matsuda3
1Nottingham Digestive Diseases Centre, NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, United Kingdom, 2Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom, 3Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan

Synopsis

Keywords: Hepatobiliary, Metabolism, Exercise

Motivation: The menstrual cycle (MC) has been shown to effect muscle glycogen utilisation during exercise but little is known about the full metabolic or glycogenic effects at varying phases.

Goal(s): To explore MC effects on exercise-induced changes in metabolites and glycogen stores.

Approach: 13C MRS and bloods were acquired from the liver and leg before and after 45 minutes of moderate exercise in healthy females. Test day was repeated 4 times 1 week apart throughout the MC.

Results: Previous findings of hormonal effects on muscle glycogen utilization were confirmed. Also, liver glycogen stores appear reduced in later MC days and correlated negatively with progesterone.

Impact: This study provides pilot data for future research. 13C MRS allows for the repeated monitoring of glycogen storage and turnover in an ethically viable way. This work has implications in understanding metabolic disorders, medical research and sports science.

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