Fat loss and muscle gain: The possible role of cortical glutamate in determining the efficacy of physical exercise

Muhammad Abdullah, Shih Hsien Lin, Li Chung Huang, Po See Chen, Huai Hsuan Tseng, Yen Kuang Yang

研究成果: Article同行評審

摘要

Background: Physical exercise is widely acknowledged for its health benefits, but its effectiveness in treating obesity remains contentious due to variability in response. Owing to the roles of glutamate in appetite regulation, food addiction, and impulsivity, this observational cohort-study evaluated medial prefrontal cortex (mPFC) glutamate as a predictor of variability in exercise response, specifically in terms of fat loss and muscle gain. Methods: Healthy non-exercising adult men (n = 21) underwent an 8-week supervised exercise program. Baseline glutamate levels in the mPFC were measured through magnetic resonance spectroscopy. For exercise-dependent changes in body composition (fat and muscle mass), basal metabolic rate (BMR), and blood metabolic biomarkers related to lipid and glucose metabolism, measurements were obtained through bioelectrical impedance and blood sample analyses, respectively. Results: The exercise program resulted in significant improvements in body composition, including reductions in percentage body fat mass, body fat mass, and waist-to-hip ratio and an increase in mean muscle mass. Furthermore, BMR and metabolic indicators linked to glucose and lipids exhibited significant changes. Notably, lower baseline glutamate levels were associated with greater loss in percentage body fat mass (r = 0.482, p = 0.027), body fat mass (r = 0.441, p = 0.045), and increase in muscle mass (r = −0.409, p = 0.066, marginal) following the exercise program. Conclusion: These preliminary findings contribute to our understanding of the neurobiology of obesity and emphasize the significance of glutamate in regulating body composition. The results also highlight cortical glutamate as a potential predictor of exercise-induced fat loss and muscle gain.

原文English
頁(從 - 到)163-170
頁數8
期刊Obesity Research and Clinical Practice
18
發行號3
DOIs
出版狀態Published - 2024 5月 1

All Science Journal Classification (ASJC) codes

  • 內分泌學、糖尿病和代謝
  • 營養與營養學

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