# Device-based physical activity measures for population surveillance—issues of selection bias and reactivity

> Research article (Frontiers in Sports and Active Living, 2023) · cited 11× · AI/ML

**Wikidata**: [openalex:W4385659709](https://www.wikidata.org/wiki/openalex:W4385659709)  
**Source**: https://4ort.xyz/entity/device-based-physical-activity-measures-for-population-surveillanceissues-of-selection-bias-and-reactivity