Published on in Vol 7 (2023)
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/38877, first published
.
![A Novel Approach to Assess Weekly Self-efficacy for Meeting Personalized Physical Activity Goals Via a Cellphone: 12-Week Longitudinal Study A Novel Approach to Assess Weekly Self-efficacy for Meeting Personalized Physical Activity Goals Via a Cellphone: 12-Week Longitudinal Study](https://asset.jmir.pub/assets/1cf3be82299a90cb69606987ca89f119.png 480w,https://asset.jmir.pub/assets/1cf3be82299a90cb69606987ca89f119.png 960w,https://asset.jmir.pub/assets/1cf3be82299a90cb69606987ca89f119.png 1920w,https://asset.jmir.pub/assets/1cf3be82299a90cb69606987ca89f119.png 2500w)
1 Department of Communication, University of California, Davis, Davis, CA, United States
2 Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, United States
3 Department of Physiological Nursing, University of California, San Francisco, San Francisco, CA, United States