Special issue: theory-based health behavior change
In: Applied psychology 57.2008,4
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In: Applied psychology 57.2008,4
In: European journal of health psychology, Band 27, Heft 3, S. 124-125
ISSN: 2512-8450
In: European psychologist, Band 14, Heft 1, S. 3-6
ISSN: 1878-531X
In: Structural equation modeling: a multidisciplinary journal, Band 14, Heft 4, S. 649-670
ISSN: 1532-8007
In: European Review of Aging and Physical Activity, Band 19, Heft 1-11
Background: This study aimed to identify latent moderate-to-vigorous intensity physical activity (MVPA) and sedentary behavior (SB) trajectories in older adults participating in a randomized intervention trial and to explore associations with baseline social-cognitive predictors. Methods: Data were assessed at baseline (T0, participants were inactive or had recently become active), after a ten-week physical activity intervention (T1), and a second 24-week intervention phase (T2). Latent class growth analysis was used on accelerometer-assessed weekly MVPA and daily SB, respectively (n = 215 eligible participants). Activity changes within trajectory classes and baseline social-cognitive predictor differences between trajectory classes were analyzed. Results: A "stable insufficient MVPA" (n = 197, p for difference in MVPA level at T0 and T2 (pT0-T2) = .789, effect size (Cohen's d) = .03) and a "stable high MVPA" trajectory (n = 18, pT0-T2 = .137, d = .39), as well as a "slightly decreasing high SB" (n = 63, p for difference in SB (pT0-T2) = .022, d = .36) and a "slightly increasing moderate SB" trajectory (n = 152, pT0-T2 = .019, d = .27) emerged. Belonging to the "stable high MVPA" trajectory was associated with higher action planning levels compared to the "stable insufficient MVPA" trajectory (M = 5.46 versus 4.40, d = .50). Belonging to the "decreasing high SB" trajectory was associated with higher action self-efficacy levels compared to the "increasing moderate SB" trajectory (M = 5.27 versus 4.72, d = .33). Conclusions: Change occurred heterogeneously in latent (not directly observed) subgroups, with significant positive trajectories only observed in the highly sedentary. Trial registration: German Registry of Clinical Trials, DRKS00016073, Registered 10 January 2019.
In: American journal of health promotion, Band 25, Heft 5, S. 294-297
ISSN: 2168-6602
Purpose. Determine the proportion of adults aware of Canada's Physical Activity Guide to Healthy Active Living (Guide) and its specific recommendations (objective 1); whether key demographic factors (objective 2a) and physical activity behavior (objective 2b) are associated with awareness and specific familiarity with the Guide; and if changes in awareness and specific recommendations with the Guide occurred over a 1-year period (objective 3a and 3b). Design. Random selection with computer-assisted telephone interviewing. Setting. Edmonton, Alberta, Canada. Subjects. A total of 2803 adults 18 years or older completed interviews from 4831 telephone contacts (response rate, 58.0%), and after 1 year, 1423 individuals (55%) completed interviews. Measures. Demographic, physical activity, Guide awareness. Analysis. Chi-square, analysis of variance. Results. At baseline, 27.3% were aware of the Guide, and 15.6% were familiar with the Guide's specific recommendations. Younger individuals (p = .01), women (p < .001), and those with a higher education (p < .001) were more likely to be generally aware of the Guide, and women were also more specifically aware (p = .01). Physical activity levels were positively associated with the general (p < .001) and specific (p < .001) awareness of the Guide. Changes in general familiarity and specific recommendations over 1 year were observed. Conclusions. The majority of those surveyed were not familiar with the Guide. Men, individuals with a lower education, and older individuals may need to be specifically targeted. (Am J Health Promot 2011;25[5]:294-297.)
In: Preventive Medicine Reports, Band 15, S. 1-9
Regular physical activity (PA) is of central importance for healthy ageing. However, in Germany, only 42% of older adults currently reach the PA recommendations of the World Health Organization. The aim of this study was to examine the effects of two web-based interventions on PA in adults aged 65–75 years living in Northwestern Germany compared to a delayed intervention control group (CG). 589 older adults were randomized to one of the three groups. Participants in intervention group 1 (IG1) received access to a web-based intervention for ten weeks assisting them in self-tracking PA behavior. Participants in IG2 received the intervention of IG1 and additionally an activity tracker to objectively track PA behavior. To analyze differences in objectively measured moderate-to-vigorous PA and sedentary time between baseline and follow-up (12 weeks after baseline), linear mixed models were used. The interaction effects revealed a decrease in minutes spent on moderate-to-vigorous PA in bouts of 10 min by 11 min per week in IG1 participants (β = −11.08, 95% CI: (−35.03; 12.87)). In comparison, IG2 participants were 7 min more physically active at follow-up (β = 7.48, 95% CI: (−17.64; 32.60)). Sedentary time in bouts of 30 min per week increased in IG1 participants (β = 106.77, 95% CI: (−47.69; 261.23)) and decreased in IG2 participants at follow-up (β = −16.45, 95% CI: (−178.83; 145.94)). Participation in the two web-based interventions did not lead to significant increases in moderate-to-vigorous PA or significant decreases in sedentary time compared to the CG.