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  • Aaron Greenhouse-Tucknott

Aaron Greenhouse-Tucknott

Aaron graduated with a BSc (Hons) in Sport and Exercise Science from the University of Brighton in 2014. His research project examined the independent influence of cadence and mechanical work on the development of neuromuscular fatigue following prolonged, sub-maximal cycling exercise. The project was subsequently presented with the 2014-2015 British Association of Sport and Exercise Sciences (BASES) undergraduate dissertation of the year award.

Email address: A.Tucknott3@uni.brighton.ac.uk

Qualification: MPhil/PhD

Timeframe: Part-time

Aaron-Greenhouse-Tucknott

Thesis title

The limits of exercise tolerance and value-based decision-making: Neurophysiological role of interoception

My research

The regulation of prolonged physical activity is recognised as a cognitive process implemented by the brain, believed to prevent harmful perturbations to homeostasis. However, despite extensive interest in this area and the development of various models exploring the nature of 'fatigue', our understanding of the fundamental mechanics of this central regulation remains limited. Drawing upon the field of neuroeconomics, the limits of exercise tolerance has more recently been conceptualised as a continuous decision-making process, derived through ongoing cost/benefit computations; the perception of fatigue reflecting a motivational input, signalling disturbances in the balance between the 'benefit' associated with current exercise behaviour and the accumulating physiological cost. This proposed framework may provide an opportunity to elucidate the neurobiological mechanisms of this elusive phenomenon. The source of this putative cost signal during acute exercise however, remains unclear, with the contribution of efferent and afferent processes in fatigue perception often debated. Interoception, or an awareness of internal bodily changes, principally mediated by small sensory afferent fibres of the periphery, has been implicated as a primary determinant in the development of fatigue and the termination of exercise performance. As such, the aim of the project is to explore the limits of exercise tolerance as a value-based decision-making process, identifying the potential role of interoception within this cognitive computation, in an attempt to delineate the constraints to physical work capacity in both health and disease.

Supervisors

Dr Jeanne Dekerle

Professor Neil Harrison

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