# Relationship between popularity and the likely efficacy: an observational study based on a random selection on top-ranked physical activity apps

> Research article (BMJ Open, 2019) · cited 16× · AI/ML

**Wikidata**: [openalex:W2987243479](https://www.wikidata.org/wiki/openalex:W2987243479)  
**Source**: https://4ort.xyz/entity/relationship-between-popularity-and-the-likely-efficacy-an-observational-study-based-on-a-random-selection-on-top-ranked