%0 Journal Article %A Renante Rondina II %A Emma K Pearson %A Harry Prapavessis %A Lauren White %A Sarah Richard %A Marc S Mitchell %T Bright spots, physical activity investments that (almost) worked: Carrot Rewards app, driving engagement with pennies a day %D 2019 %R 10.1136/bjsports-2019-100969 %J British Journal of Sports Medicine %P bjsports-2019-100969 %U https://bjsm.bmj.com/content/bjsports/early/2019/11/11/bjsports-2019-100969.full.pdf