Abstract
RationaleAlthough effects of individual planning interventions on physical activity (PA) are well established, less is known about the relationships between planning and sedentary behavior (SB). ObjectiveThis study evaluated the efficacy of individual planning, dyadic planning (i.e., joint planning, targeting the behavior of one person only: the target person), and collaborative planning (i.e., joint planning and joint behavioral performance) on sedentary behavior among dyads. MethodsDyads (N = 320 target persons and their partners, aged 18–90 years) were randomized into three PA planning conditions (individual, dyadic, or collaborative) or an active (education) control condition. Main outcomes, i.e., sedentary time, proportion of time spent in SB and light-intensity PA, proportion of time spent in SB and total PA were measured with GT3X-BT accelerometers at baseline, 1-week follow-up, and 36-week follow-up. Two-level models with measurement points nested in participants were fit, separately for target persons and partners. ResultsFindings for target persons obtained at 1-week follow-up indicated that in the collaborative planning condition SB time significantly decreased, compared to the control condition (p = .013). There was an improvement in the proportion of time spent in SB and light-intensity PA (p = .019), and the proportion of time spent in SB and total PA (p = .018), indicating that SB time was displaced by PA. Effects of individual and dyadic planning were not significant, compared to the control condition. None of interventions had a significant effect on SB indices at 36-week follow-up. Regarding dyadic partners, there were no effects of planning interventions at 1-week follow-up or 36-week follow-up, compared to the control condition. ConclusionsCollaborative planning may prompt a short-term reduction of SB time and result in a shift towards a healthier balance between SB time and PA time among target persons, who did not adhere to PA guidelines at baseline.
Highlights
Sedentary behavior (SB) can be defined as any waking activity characterized by an energy expenditure ≤1.5 METs while in a sitting, lying, or reclining posture (Tremblay et al, 2017)
There was an improvement in the proportion of time spent in sedentary behavior (SB) and light-intensity physical activity (PA) (p = .019), and the proportion of time spent in SB and total PA (p = .018), indicating that SB time was displaced by PA
Further inclusion criteria for dyads were: (1) target persons and partners being at least 18 years old; (2) during the initial interview at least one person in the dyad declared PA levels that were below the recommended threshold (WHO, 2010, 2020), that is, 150 min of moderate-tovigorous physical activity (MVPA) per week and/or were recommended by a specialist to reduce SB and increase their PA levels due to type-2 diabetes or cardiovascular diseases; (3) target persons were reporting at least moderate intention to initiate regular PA; (4) providing informed consent
Summary
Sedentary behavior (SB) can be defined as any waking activity characterized by an energy expenditure ≤1.5 METs while in a sitting, lying, or reclining posture (Tremblay et al, 2017). One in five Europeans sit for more than 7.5 h each day (Loyen et al, 2016). High levels of SB are associated with an increased risk of chronic diseases, such as fatal and non-fatal cardiovascular disease, metabolic syndrome, type 2 diabetes, and lower physical quality of life (Boberska et al, 2018; De Rezende et al, 2014). The World Health Organization (WHO) recommends that adults should limit the amount of SB and replace it with physical activity (PA) of any intensity to help reduce its detrimental effects on health (WHO, 2020)
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