{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T07:40:09Z","timestamp":1781077209188,"version":"3.54.1"},"reference-count":25,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2017,12,19]],"date-time":"2017-12-19T00:00:00Z","timestamp":1513641600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["British J Health Psychol"],"published-print":{"date-parts":[[2018,5]]},"abstract":"\n Objectives<\/jats:title>\n The randomized controlled trial examined factors that might be responsible for individual differences in physical activity change among men and women who participated in a lifestyle intervention. The main purpose of the analyses regarded the role of psychological mechanisms involving motivation, planning, self\u2010monitoring, and habit strength.<\/jats:p>\n <\/jats:sec>\n \n Design<\/jats:title>\n A two\u2010arm digital intervention was conducted in Italy, Spain, and Greece to improve physical activity levels, with follow\u2010ups at 3 and 6\u00a0months after baseline assessment.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n Participants were 1,564 adults at baseline,\n n<\/jats:italic>\n \u00a0=\u00a0638 at 6\u2010month follow\u2010up. Linear mixed models examined the intervention effects, and a two\u2010group longitudinal structural equation\u00a0model explored which psychological constructs (motivation, planning, self\u2010monitoring, habit strength) were associated with changes in physical activity.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n In addition to an overall increase in self\u2010reported activity, there were interactions between time and sex and between time and experimental groups, and a triple interaction between time, sex, and experimental groups, indicating that men reported an increase in activity independent of groups, whereas women in the active control group did not benefit from the intervention. Planning, self\u2010monitoring, and habit strength mediated sequentially between initial motivation and follow\u2010up physical activity.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Although the intervention produced overall improvements in physical activity, the time\u2010by\u2010treatment interaction emerged only for women. The mechanism included a sequence leading from motivation via planning, self\u2010monitoring, and habit strength towards physical activity.<\/jats:p>\n <\/jats:sec>\n \n \n \n \n \n Statement of contribution<\/jats:title>\n <\/jats:caption>\n \n \n What is already known on this subject?<\/jats:bold>\n <\/jats:italic>\n <\/jats:p>\n \n \n \n Digital lifestyle interventions can be effective in terms of physical activity performance gains.<\/jats:p>\n <\/jats:list-item>\n \n Men are on average more physically active than women.<\/jats:p>\n <\/jats:list-item>\n \n Long\u2010term adherence rates to digital interventions are usually low.<\/jats:p>\n <\/jats:list-item>\n <\/jats:list>\n <\/jats:p>\n \n \n What does this study add?<\/jats:bold>\n <\/jats:italic>\n <\/jats:p>\n \n \n \n Giving users of an online platform more interactive options did not make a difference.<\/jats:p>\n <\/jats:list-item>\n \n Women gained more than men from adaptive, dynamic online platform content.<\/jats:p>\n <\/jats:list-item>\n \n Individual characteristics (motivation, planning, self\u2010monitoring, habit) were more important than online treatment features.<\/jats:p>\n <\/jats:list-item>\n <\/jats:list>\n <\/jats:p>\n <\/jats:boxed-text>\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/bjhp.12288","type":"journal-article","created":{"date-parts":[[2017,12,19]],"date-time":"2017-12-19T04:04:46Z","timestamp":1513656286000},"page":"296-310","source":"Crossref","is-referenced-by-count":13,"title":["Psychological mechanisms in a digital intervention to improve physical activity: A multicentre randomized controlled trial"],"prefix":"10.1111","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0069-3826","authenticated-orcid":false,"given":"Ralf","family":"Schwarzer","sequence":"first","affiliation":[{"name":"Freie Universit\u00e4t Berlin Germany"},{"name":"SWPS University of Social Sciences and Humanities Wroclaw Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa","family":"Warner","sequence":"additional","affiliation":[{"name":"Freie Universit\u00e4t Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lena","family":"Fleig","sequence":"additional","affiliation":[{"name":"Freie Universit\u00e4t Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maryam","family":"Gholami","sequence":"additional","affiliation":[{"name":"Freie Universit\u00e4t Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergio","family":"Salvatore","sequence":"additional","affiliation":[{"name":"Euro\u2010Mediterranean Biomedical Scientific Institute University of Salento Lecce Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luisella","family":"Cianferotti","sequence":"additional","affiliation":[{"name":"Department of Surgery and Translational Medicine University of Florence Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evangelia","family":"Ntzani","sequence":"additional","affiliation":[{"name":"Department of Hygiene and Epidemiology University of Ioannina School of Medicine Greece"},{"name":"Center for Evidence\u2010Based Medicine Department of Health Services, Policy and Practice School of Public Health Brown University Providence Rhode Island USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Blanca","family":"Roman\u2010Vi\u00f1as","sequence":"additional","affiliation":[{"name":"Nutrition Research Foundation University of Barcelona Science Park Spain"},{"name":"CIBER Physiopathology of Overweight and Nutrition (CIBERobn) Institute of Health Carlos III (ISCIII) Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonia","family":"Trichopoulou","sequence":"additional","affiliation":[{"name":"Hellenic Health Foundation Athens Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria L.","family":"Brandi","sequence":"additional","affiliation":[{"name":"Department of Surgery and Translational Medicine University of Florence Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,12,19]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1161\/JAHA.115.003058"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.2196\/mhealth.5768"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/08870446.2016.1250273"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.psychsport.2014.05.002"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/aphw.12083"},{"key":"e_1_2_6_7_1","unstructured":"Department of Health. 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