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01-08-2016 | Uitgave 4/2016 Open Access

Journal of Behavioral Medicine 4/2016

The effect of need supportive text messages on motivation and physical activity behaviour

Tijdschrift:
Journal of Behavioral Medicine > Uitgave 4/2016
Auteurs:
Florence-Emilie Kinnafick, Cecilie Thøgersen-Ntoumani, Joan Duda
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Electronic supplementary material

The online version of this article (doi:10.​1007/​s10865-016-9722-1) contains supplementary material, which is available to authorized users.

Abstract

Few short messaging service (SMS) studies to support behaviour change have used a theoretical underpinning. Using a self-determination theory perspective, we explored the effects of need supportive (NS) SMS on physical activity in 65 (BMI = 24.06 kg/m2, SD = 5.49; M = 25.76 years, SD = 10.23) insufficiently active individuals embarking on an existing exercise programme. For 10 weeks participants were randomised to an intervention group (NS) or control group (neutral). SMS were sent twice weekly, randomly, via an online SMS service. Mixed design ANCOVA and MANCOVA analyses of measures taken at baseline, mid and post intervention revealed increased levels of perceived autonomy support and psychological need satisfaction in the intervention group post intervention. Both groups reported increases in intrinsic motivation from pre to post intervention. Moderate intensity physical activity was greater in the intervention than the control group at 4-month post intervention with control group returning to baseline levels. Findings provide preliminary causal evidence to support the use of NS SMS to optimise physical activity behaviour change in individuals who are insufficiently active.

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Extra materiaal
Supplementary material 1 (DOCX 16 kb)
10865_2016_9722_MOESM1_ESM.docx
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