Published on in Vol 8 , No 7 (2021) :July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/28168, first published
.

1 Department of Rehabilitation, Physical Therapy Science and Sports, University Medical Center Utrecht, Utrecht, NL
2 Department of Psychology, Health and Technology, University of Twente, Enschede, NL