2023 Yes https://www.sciencedirect.com/science/article/pii/S0048969722076203?via%3Dihub Kouis, Panayiotis Europe Experimental Students Elementary (K-5) Particulate Matter (PM) Dust Respiratory symptoms Other Desert dust storms Asthmatic children Outdoor exposure Wearable sensors Physical activity Global positioning system The change in the time spent outside classrooms and homes, between non-DDS and DDS days, was 37.2 min (pvalue = 0.098) in the control group and -62.4 min (pvalue < 0.001) in the intervention group. The difference in the effects between the two groups was statistically significant (interaction pvalue < 0.001). The change in daily steps performed outside classrooms and homes, was -495.1 steps (pvalue = 0.350) in the control group and -1039.5 (pvalue = 0.003) in the intervention group (interaction pvalue = 0.575). The effects on both the time and steps performed outside were more profound during after-school hours. To summarize, among children with asthma, we demonstrated that timely personal DDS alerts and detailed recommendations lead to significant behavioral changes in contrast to the usual public health recommendations.