Only 8% of the exercise interventions induced behaviour change that was significant and measurable after the four-week intervention¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2021 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Only 8% of the 54 interventions induced behaviour change that was significant and measurable after the four-week intervention ended. → Kautz 2021

Evidence¶

Kautz 2021¶

Kautz, T., Milkman, K. L., Gromet, D., et al. as printed in full author line. (2021). Megastudies Improve the Impact of Applied Behavioural Science. Nature, vol. 600. https://www.mathematica.org/publications/megastudies-improve-the-impact-of-applied-behavioural-science doi:10.1038/s41586-021-04128-4

q3 · i? · causal · r2

Post-intervention follow-up within the fitness-chain megastudy: the article reports that "Only 8% of interventions induced behaviour change that was significant and measurable after the four-week intervention," contrasting with the 45% that raised visits during the intervention. No effect size is printed for this persistence finding.

"Only 8% of interventions induced behaviour change that was significant and measurable after the four-week intervention."

Discussion¶

Related Claims¶

• Forecasts by impartial judges failed to predict which interventions would be most effective — related
• 45% of the 54 exercise interventions significantly increased weekly gym visits by 9% to 27% during the four-week intervention — related
• Among interventions that increased exercise during the intervention, carry-over effects were proportionally similar to previous research — related
• The top-performing exercise intervention offered microrewards for returning to the gym after a missed workout — related