Long-term effects of a dyadic planning intervention with couples motivated to increase physical activity

Jan Keller , Diana Hilda Hohl , Georg Hosoya , Silke Heuse , Urte Scholz , Aleksandra Łuszczyńska , Nina Knoll


Objective In dyadic planning a target person and a planning partner create plans for when, where, and how the target person will change a health-relevant behavior. Across 52 weeks, direct and indirect effects of a dyadic-planning intervention on moderate-to-vigorous physical activity (MVPA) and physical fitness in target persons and their partners were investigated in a randomized controlled trial. Relationship quality was explored as a moderator. Methods N = 338 couples (target persons randomized) were randomly assigned to a dyadic-planning- (DPC), an individual-planning- (IPC), or a no-planning dyadic-control condition (CC). MVPA was objectively assessed four times across 52 weeks using accelerometry. Physical fitness and proposed mediators (individual action control, received behavior-specific support and control) were repeatedly assessed. Relationship quality was measured at baseline. Latent growth curve-, multi-level-, and manifest mediation models were fit. Results Across 52 weeks, MVPA of IPC and CC target persons increased. MVPA of DPC target persons remained stable, but those who reported high relationship quality increased their MVPA over time. DPC partners showed steeper increases in physical fitness when compared to IPC partners, but not CC partners. DPC partners’ increases in physical fitness were mediated by received support from target persons. Conclusions The dyadic planning intervention showed non-beneficial effects for target persons’ MVPA, but beneficial effects on their partners’ fitness. These findings resemble evidence from the social support literature indicating more benefits for support providers than for recipients.
Author Jan Keller
Jan Keller,,
, Diana Hilda Hohl
Diana Hilda Hohl,,
, Georg Hosoya
Georg Hosoya,,
, Silke Heuse
Silke Heuse,,
, Urte Scholz
Urte Scholz,,
, Aleksandra Łuszczyńska (Wydział Psychologii w Warszawie)
Aleksandra Łuszczyńska,,
- Wydział Psychologii w Warszawie
, Nina Knoll
Nina Knoll,,
Journal seriesPsychology of Sport and Exercise, ISSN 1469-0292, e-ISSN 1878-5476, (N/A 100 pkt)
Issue year2020
Publication size in sheets0.5
Article number101710
Keywords in Englishplanning; Physical activity; Randomized controlled trial; Couples; Dyad; Accelerometer
ASJC Classification3202 Applied Psychology
Languageen angielski
Long_tekst.pdf 655.71 KB
Oswiadczenie_A Luszczynska.pdf 359.31 KB
Score (nominal)100
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.75; WoS Impact Factor: 2018 = 2.71 (2) - 2018=3.662 (5)
Citation count*3 (2021-04-11)
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