N %
Invited 5000
Respondents 2.276 45.5 of sample
Owns smartwatch/Fitbit/app on phone 1.119 49.2 of respondents
Willing to copy own data in questionnaire 509 58.0 of owners1
Willing to upload data 332 40.6 of owners2
Willing to wear loaned accelerometer 1.109 48.7 of respondents