Lifelong Exercise as a Modulator of CD4 + T Cell Immunometabolism
Year: 2026
Type: article
Abstract: ABSTRACT Background It is commonly assumed that aging and chronic low‐grade inflammation compromise adaptive immunity, particularly the function and metabolism of CD4 + T cells. The preceding are key regulators of immune responses. These immunological alterations contribute to increased susceptibility to infections, diminished vaccine efficacy and the progression of age‐related diseases. In contrast, adolescence and young adulthood tend to be characterized by more robust immune responses, though these are heavily influenced by modifiable lifestyle factors such as habitual physical activity, level of cardiorespiratory fitness, diet and body adiposity. Emerging evidence suggests that sustained physical activity throughout life may preserve CD4 + T cell competence by favourably modulating their metabolic programming. Methods The current narrative review explores how lifelong physical exercise impacts CD4 + T cell metabolism, with particular emphasis on the developmental window of adolescence and the long‐term benefits of early and sustained physical training across the lifespan. Molecular mechanisms linking exercise to metabolic reprogramming of T cells were summarised in parallel with attenuation of immunosenescence and inflammation over the lifespan. Results This review suggests that lifelong exercise may reprogram CD4 + T cell metabolism, enhancing oxidative phosphorylation at rest and glycolytic control upon activation, thereby improving Th17/Treg balance, reducing chronic inflammation and enabling effective effector T cell responses. In this context, exercise initiated early in life may act as a critical modulator by promoting optimal immune function from childhood and establishing a functional peak that helps preserve immune competence during aging. Conclusions Lifelong and early‐life exercise may reprogram CD4 + T cell metabolism, strengthening immune balance and preserving immune function during aging.
DOI: 10.1111/eci.70204
Institutions: Universidade Estadual Paulista (Unesp), University of Birmingham, University of North Carolina at Greensboro, Universidade Federal de Ciências da Saúde de Porto Alegre, Universidade de São Paulo, Centro de Neurociências e Biologia Celular, Centro de Inovação em Biomedicina e Biotecnologia, University of Coimbra, University of Lisbon, Centro Interdisciplinar de Estudo da Performance Humana
Language: English
Subfield: Rehabilitation
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $4,100
OpenAlex ID: W7160408744