Abstract
Mental fatigue is referred to as a psychophysiological or neurobiological state
caused by prolonged periods of demanding cognitive activity. Sport and exercise
science research studies have investigated the effects of experimentally induced
mental fatigue on cognitive performance, with mixed results. It has been
suggested that negative effects of mental fatigue on cognition performance in
laboratory studies could translate to impaired sport performance. However, it
remains unclear if impairments in sport performance are due to mental fatigue
and how mental fatigue may differ from physical fatigue. Fatigue is well
understood as a complex multifactorial construct involving interactions between
physiological and neuropsychological responses across brain regions. It may be
prudent for researchers to return to the origins of fatigue and cognition before
attempting to connect mental fatigue and sport cognition. This article reviews
the concept of mental fatigue, its mechanisms and neuroanatomical basis, models
of cognition relevant to sports science, investigates how mental fatigue may
influence cognition, and suggests future research directions. Mental fatigue as
a construct separated from fatigue could be an oversight that has hindered the
development of our understanding of mental fatigue. Future sports science
research could work to enhance our knowledge of our definitions of fatigue.
Keywords
cognition - cognitive fatigue - cognitive performance - fatigue - mental fatigue -
neuropsychology