Carr, Rachel Margaret ORCID: https://orcid.org/0000-0001-6972-0100, Quested, Eleanor ORCID: https://orcid.org/0000-0002-6211-9045, Stenling, Andreas ORCID: https://orcid.org/0000-0002-0834-1040, Thøgersen-Ntoumani, Cecilie ORCID: https://orcid.org/0000-0003-0255-1263, Prestwich, Andrew ORCID: https://orcid.org/0000-0002-7489-6415, Gucciardi, Daniel Frank ORCID: https://orcid.org/0000-0001-5448-3990, McVeigh, Joanne ORCID: https://orcid.org/0000-0002-2446-3814 and Ntoumanis, Nikos ORCID: https://orcid.org/0000-0001-7122-3795 (2021) Postnatal Exercise Partners Study (PEEPS): a pilot randomized trial of a dyadic physical activity intervention for postpartum mothers and a significant other. Health Psychology and Behavioral Medicine, 9 (1). pp. 251-284.

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Abstract

Background: Research suggests dyadic interventions can increase physical activity; such interventions are untested within postpartum parent couples.

Methods: A three-armed pilot randomized trial addressed this gap and tested which type of dyadic intervention is most effective. Inactive postpartum mothers and a significant other were recruited in Australia (n = 143 assessed for eligibility) and randomised in a single-blinded fashion (i.e. participants were blinded) to 1 of 3 dyadic conditions involving a single face-to-face session with access to web-based group support: a minimal treatment control (n = 34), collaborative planning group (n = 38), or collaborative planning + need supportive communication group (n = 30). Participants were asked to wear their accelerometers for 8 days and completed self-report measures at baseline, end of intervention (week 4), and follow-up (week 12). We expected dyads in the collaborative planning + need supportive communication group would have the greatest increases in Physical Activity (PA), autonomous motivation, and partners’ need supportive behaviours; and decreases in controlled motivation and controlling partner behaviours.

Results: Results from 51 dyads using Bayesian actor-partner interdependence models provided some evidence for a small positive effect on total PA at follow-up for postpartum mothers in the collaborative planning group and for partners in the collaborative planning + need supportive communication group. Furthermore, partners in the collaborative planning + need supportive communication group were more likely to engage in some vigorous PA. At follow-up, postpartum mothers in the collaborative planning + need supportive communication group scored lower on personal autonomous reasons.

Conclusions: The impact of prior specification mean intervention effects need to be interpreted with caution. Progression to a full trial is warranted.

Item Type:	Article
Status:	Published
DOI:	10.1080/21642850.2021.1902815
School/Department:	School of Health Sciences
URI:	https://ray.yorksj.ac.uk/id/eprint/15940

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