Can inequity be transmitted? Big data show the influence of physical activity inequity on socioeconomic inequity

The cumulative health effect resulting from the disparity in physical activity engagement could be transformed into out-of-pocket health expenditure in future, which would widen the socioeconomic gap on all portions of the income spectrum. Recent study reveals the association between physical activity inequity and social inequity. However, the difficulty in accurately measuring the physical activity could deter further exploration of this issue. This correspondence use smartphone-derived big data to provide a more fine-grained depiction, which suggest that the inequity in physical activity can contribute to the social inequity several years later.