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Studying microtemporal, within-person processes of diet, physical activity, and related factors using the appetite-mobile-app: Feasibility, usability, and validation study

Ruf, Alea; Koch, Elena D. 1; Ebner-Priemer, Ulrich 1; Knopf, Monika; Reif, Andreas; Matura, Silke
1 Institut für Sport und Sportwissenschaft (IfSS), Karlsruher Institut für Technologie (KIT)


Diet and physical activity (PA) have a major impact on physical and mental health. However, there is a lack of effective strategies for sustaining these health-protective behaviors. A shift to a microtemporal, within-person approach is needed to capture dynamic processes underlying eating behavior and PA, as they change rapidly across minutes or hours and differ among individuals. However, a tool that captures these microtemporal, within-person processes in daily life is currently not present.

The APPetite-mobile-app is developed for the ecological momentary assessment of microtemporal, within-person processes of complex dietary intake, objectively recorded PA, and related factors. This study aims to evaluate the feasibility and usability of the APPetite-mobile-app and the validity of the incorporated APPetite-food record.

The APPetite-mobile-app captures dietary intake event-contingently through a food record, captures PA continuously through accelerometers, and captures related factors (eg, stress) signal-contingently through 8 prompts per day. Empirical data on feasibility (n=157), usability (n=84), and validity (n=44) were collected within the Eat2beNICE-APPetite-study. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136097
Veröffentlicht am 08.08.2021
DOI: 10.2196/25850
Zitationen: 8
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2021
Sprache Englisch
Identifikator ISSN: 1438-8871, 1439-4456
KITopen-ID: 1000136097
Erschienen in Journal of Medical Internet Research
Verlag JMIR Publications
Band 23
Heft 7
Seiten Art.-Nr.: P1-P17
Nachgewiesen in Dimensions
Web of Science
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