Exercise training to preserve vitality capacity in ageing.

Ageing is an escalating global health issue, with the World Health Organization (WHO) reporting that one in six individuals will be 60 years or older by the year 2030. Therefore, understanding the mechanisms of complex biological ageing processes and associated healthcare challenges has become increasingly important. Intrinsic capacity (IC), defined by WHO as the composite of all physical and mental capacities an individual possesses, can be used as a proxy for defining healthy ageing. IC has five key components: locomotion, cognition, psychological, sensory, and vitality capacity (VC). This review paper specifically focuses on exercise as an effective tool to preserve VC in ageing populations. The physiological domains of VC discussed include energy and metabolism, neuromuscular function, immune and stress response, mitochondrial function, and the methylation clock. Additionally, we highlight potential outcome measures for assessing each of these domains. This review also covers areas of focus for future research and possible interventions. We ultimately conclude that ageing is a complex, multifaceted process resulting in deficits across multiple VC components. However, regular exercise is capable of producing physiological adaptations that may be beneficial in the context of healthy ageing and improving or preserving the status of VC components.