A holistic state of robust physiological and psychological vigor characterized by high levels of sustained physical stamina, mental clarity, emotional resilience, and a fundamental drive for activity. This subjective experience is closely correlated with optimal cellular energy production, mitochondrial health, and a balanced endocrine profile, including robust thyroid and adrenal function.
Origin
This term is a popular descriptor for the desired outcome of longevity and wellness interventions, reflecting the tangible feeling of well-being associated with peak physiological function. It translates complex biological efficiency into a relatable, experiential metric.
Mechanism
The sensation of youthful energy is biologically underpinned by efficient energy metabolism, where mitochondria function optimally to produce ATP without excessive reactive oxygen species. Hormones are key regulators: thyroid hormones set the basal metabolic rate, cortisol provides the immediate energy for the stress response, and sex steroids influence muscle mass and red blood cell production, all contributing to the body’s overall capacity for sustained activity and vitality.
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