Abstract
BackgroundThe evidence shows that WAT-based interventions enhance the physical activity (PA) levels of young people by sustainably delivering behavior change techniques (BCTs). These results may not be replicable among older adults. This paper aims to evaluate the effectiveness of WAT-based interventions in improving PA levels in sedentary older adults. MethodsEight electronic databases were searched for randomized controlled trials published January 2008 to December 2018. BCTs delivered by WAT aimed at increasing PA levels using step counts or time spent on moderate-to-vigorous (MVPA) exercise as an outcome were eligible for inclusion. ResultsIn nine out of the ten included studies, higher PA levels were seen in the intervention group than in the control group. One study where the participants’ mean age was 80+ showed no significant increase in PA levels. Significant effects were also demonstrated from the meta-analysis, which included four studies using a passive control (i.e., the usual care or health information) on step counts (n = 207, Hedges g = 1.27, 95 % CI = 0.51–2.04, p = 0.001) and two studies on MVPA (n = 83, Hedge’s g = 1.23, 95 % CI = 0.75–1.70, p < 0.001). A non-significant effect was found on step counts (n = 201, Hedge’s g = 0.22, 95 % CI = −0.62 to 1.06, p = 0.61) in three studies that used an active control comparison group (i.e., traditional pedometer). ConclusionsA WAT-based intervention is effective at improving PA levels among older adults over the short term when compared with the usual care or health information. However, when compared with a traditional pedometer or when used among old-old adults, the results were inconclusive.
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