Published on in Vol 9, No 1 (2021): Jan-Mar
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22802, first published
.
![Physiological Responses and User Feedback on a Gameful Breathing Training App: Within-Subject Experiment Physiological Responses and User Feedback on a Gameful Breathing Training App: Within-Subject Experiment](https://asset.jmir.pub/assets/87e6fce05715b989569da6a787cd567c.png 480w,https://asset.jmir.pub/assets/87e6fce05715b989569da6a787cd567c.png 960w,https://asset.jmir.pub/assets/87e6fce05715b989569da6a787cd567c.png 1920w,https://asset.jmir.pub/assets/87e6fce05715b989569da6a787cd567c.png 2500w)
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