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. 2026 Jan;30(1):100715.
doi: 10.1016/j.jnha.2025.100715. Epub 2025 Nov 8.

Association between Accelerometer-derived Physical Activity-related Metabolic Signature and Stroke: A Cohort Study from UK Biobank

Affiliations

Association between Accelerometer-derived Physical Activity-related Metabolic Signature and Stroke: A Cohort Study from UK Biobank

Bowen Tan et al. J Nutr Health Aging. 2026 Jan.

Abstract

Background: Accelerometer-derived physical activity is associated with reduced stroke risk. The biological pathways underpinning this relationship, however, are not yet understood. Herein, we aim to identify metabolic signatures associated with accelerometer-measured PA and investigate their relationships with reduced stroke incidence.

Method: Utilizing UK Biobank accelerometer data, we derived physical activity into total physical activity (TPA), moderate-to-vigorous physical activity (MVPA), and light physical activity (LPA) and linked them to 249 NMR-quantified plasma metabolites. The metabolomic signatures (TPA-/MVPA-/LPA-metabolomic signatures) were developed through internal validation followed by elastic-net regression modeling. Cox proportional hazards models evaluated activity-stroke associations (adjusted for sociodemographic/genetic factors), followed by mediation analysis to quantify metabolomic signature effects.

Results: Through UK Biobank study (N = 29445; 14.1-year follow-up with 513 stroke events), we identified 195 TPA, 173 MVPA, and 164 LPA metabolite associations (FDR < 0.05), with 107, 92, and 15 validated, respectively. Elastic net-derived physical activity-metabolomic signatures (TPA-/MVPA-metabolomic signatures) correlated with physical activity intensities (r = 0.20-0.30, P < 0.001) and were associated with reduced stroke risk: TPA-metabolomic signatures (HR = 0.61, 95% CI: 0.44-0.87); MVPA-metabolomic signatures (HR = 0.50, 95%CI: 0.29-0.88). Mediation analyses showed TPA-metabolomic signatures and MVPA-metabolomic signatures explained 12.2% and 8.5% of physical activity-stroke associations (P < 0.001), implicating specific lipoprotein subclasses and lipids as key mediators.

Conclusion: TPA-metabolomic signatures and MVPA-metabolomic signatures, particularly the 11 key metabolites included, significantly mediate the association between accelerometer-derived physical activity and stroke risk.

Keywords: Accelerometer-derived physical activity; Metabolomics; Stroke; UK Biobank.

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Conflict of interest statement

Declaration of competing interest The author declares no conflict of interest.

Figures

None
Graphical abstract
Fig. 1
Fig. 1
Flowchart of the individual selection.
Fig. 2
Fig. 2
(A) Heatmap of metabolite associations with accelerometer-derived physical activity (TPA, MVPA, LPA). (B) The weights of the metabolites selected in the PA‐MetS.
Fig. 3
Fig. 3
Estimated proportion of the association between Accelerometer-derived Physical Activity and all-cause stroke mediated by physical activity-related metabolic signature. Models were adjusted for Physical activity and Metabolic signature age, sex, ethnicity, townsend deprivation index, diet pattern, BMI, polygenic risk score for stroke, history of CVD, history of Hypertension. IE, the estimate of the indirect effect; DE, the estimate of the direct effect; Proportion of mediation = IE/DE.

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