The Role of Mental Fatigue in Changing Metabolic Efficiency in Runners

Abstract

This study aims to explore the relationship between mental fatigue and metabolic efficiency in professional runners. While mental fatigue is a significant factor affecting athletic performance, its physiological mechanisms and impact on energy metabolism have not been adequately studied. The research was conducted on a sample of 40 professional runners (22 males and 18 females) using a repeated-measures experimental design, where participants underwent running tests under mental fatigue and control conditions. Researchers measured basal metabolic rate, oxygen consumption, glucose and fat utilization rates, and levels of cortisol and neurotransmitters. Results showed that mental fatigue leads to a 7-12% decrease in metabolic efficiency during running, with increased glucose consumption at the expense of fat utilization and elevated cortisol levels. Reduced recovery rates after exertion were also observed. The study proposed a new explanatory model called the "Integrated Neurometabolic Model," which clarifies the interaction mechanisms between mental fatigue and metabolism. This research provides new insights for improving training strategies and nutrition for runners, emphasizing the importance of cognitive load management as an essential component of athletic performance enhancement programs.