# Your Smartwatch May Predict Disease Risk by Tracking Your Body Clock

*Wearable-Derived Diurnal Alignment Between Physical Activity and Device Temperature Predicts Future Disease and Mortality Risk.*

- **Evidence Level**: Moderate
- **Publication Types**: Journal Article
- **Journal**: Advanced science (Weinheim, Baden-Wurttemberg, Germany)
- **Sample Size**: ~90,000 adults, median age 63
- **Authors**: Chen H, Wei J, Cedernaes J, Benedict C, Tsanas A, Cao Z, Tan X
- **Published**: 2026-06-19
- **Topics**: circadian rhythm, wearables, disease risk
- **DOI**: https://doi.org/10.1002/advs.76217
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42318644/

## Summary

Your body has a daily rhythm for movement and temperature, and how well these two line up seems to matter. In about 90,000 middle-aged and older adults, those with better-synced daily rhythms had lower odds of diabetes, heart disease, depression, and early death. This data came from a week of wrist-worn trackers, the same kind many people already use.

## Practical Takeaway

This study suggests keeping a steady daily rhythm of activity may track with better long-term health.

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_Canonical: https://longevity-germany.com/en/research/your-smartwatch-may-predict-disease-risk-by-tracking-your-body-clock · Part of Longevity Cities · Updated 2026-06-19_