Association between time spent outdoors during the day and biological age acceleration among UK Biobank participants.

Jia-Dong Ning, Pan-Pan Zhu, Xiaofeng Ma, Yu-Xiang Long, Ju-Min Deng, Yi-Ming Tao, Chun-Quan Ou, Li Li

State Key Laboratory of Multi-Organ Injury Prevention and Treatment, Department of Biostatistics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China. · pubmed

Paper

Abstract

We aimed to determine whether time spent outdoors during the day (TOD) is associated with biological age (BA) acceleration, and to identify the optimal TOD. BA acceleration was defined as the residual from regressing Klemera-Doubal method BA (KDM-BA) or phenotypic age (PhenoAge) on chronological age. Generalized additive models were applied to evaluate the associations of TOD with BA acceleration in summer and winter, separately. The optimal TOD associated with the lowest KDM-BA acceleration was two hours/day in summer and one hour/day in winter. For PhenoAge acceleration, the optimal TOD was one hour longer. Both KDM-BA and PhenoAge acceleration increased with TOD when it was longer than the optimal TOD. However, PhenoAge acceleration decreased with TOD when it was shorter than the values of optimal TOD in both summer (change in BA acceleration associated with each hour increase in TOD [

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Research summary

The paper claims that there is an optimal amount of time spent outdoors that is associated with reduced biological age acceleration. This research is relevant as it explores lifestyle factors that may influence biological aging, which is a key aspect of longevity studies.

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