30 behavioral scientists designed a
54 condition “megastudy” testing different
4-week digital programs to increase the gym visits of
61,293 @24hourfitness members
574 forecasters failed to predict what worked
TODAY our results are out in @Naturehttps://t.co/9UHuCs5LXz pic.twitter.com/32PapTLTwd

— Katy Milkman (@katy_milkman) December 8, 2021