Fasting, Exercise and Mental Effort for Health & Cognition
n the environments of our distant ancestors, food was often scarce, and energy expenditure high. Three factors have all been powerful selective pressures in human evolution:
- Caloric (energy) restriction (CR) in times of food scarcity
- Physical energy expenditure ( e.g. for running, hunting, fighting, artifact making)
- Mental energy expenditure (e.g. for learning, reasoning, strategizing) – known as mental effort.
As our species evolved, individuals that were mentally sharp, physically fit, and disease or illness-free during periods of limited resource availability and could deal effectively with these energy stressors had an adaptive advantage.
Fasting, Exercise and Mental Effort for Health & Cognition | CogPsyLab.