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Effectiveness of a walking programme to support adults with intellectual disabilities to increase physical activity : walk well cluster-randomised controlled trial

Melville, Craig A. and Mitchell, Fiona and Stalker, Kirsten and Matthews, Lynsay and McConnachie, Alex and Murray, Heather M. and Melling, Chris and Mutrie, Nanette (2015) Effectiveness of a walking programme to support adults with intellectual disabilities to increase physical activity : walk well cluster-randomised controlled trial. International Journal of Behavioral Nutrition and Physical Activity, 12. ISSN 1479-5868

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Abstract

Programs to change health behaviours have been identified as one way to reduce health inequalities experienced by disadvantaged groups. The objective of this study was to examine the effectiveness of a behaviour change programme to increase walking and reduce sedentary behaviour of adults with intellectual disabilities. We used a cluster randomised controlled design and recruited participants over 18 years old and not regularly involved in physical activity from intellectual disabilities community-based organisations. Assessments were carried out blind to allocation. Clusters of participants were randomly allocated to the Walk Well program or a 12-week waiting list control. Walk Well consisted of three face-to-face physical activity consultations incorporating behaviour change techniques, written resources for participants and carers, and an individualised, structured walking programme. The primary outcome measured with accelerometers was change in mean step count per day between baseline and 12 weeks. Secondary outcomes included percentage time per day sedentary and in moderate-vigorous physical activity (MVPA), body mass index (BMI), and subjective well being. One hundred two participants in 50 clusters were randomised. 82 (80.4 %) participants completed the primary outcome. 66.7 % of participants lived in the most deprived quintile on the Scottish Index of Multiple Deprivation. At baseline, participants walked 4780 (standard deviation 2432) steps per day, spent 65.5 % (standard deviation 10.9) of time sedentary and 59 % percent had a body mass in the obesity range. After the walking programme, the difference between mean counts of the Walk Well and control group was 69.5 steps per day [95 % confidence interval (CI) -1054 to 1193.3]. There were no significant between group differences in percentage time sedentary 1.6 % (95 % CI −2.984 to 6.102), percentage time in MVPA 0.3 % (95 % CI −0.7 to 1.3), BMI −0.2 kg/m 2 (95 % CI −0.8 to 0.4) or subjective well-being 0.3 (95 % CI −0.9 to 1.5). This is the first published trial of a walking program for adults with intellectual disabilities. Positively changing physical activity and sedentary behaviours may require more intensive programmes or upstream approaches to address the multiple social disadvantages experienced by adults with intellectual disabilities. Since participants spent the majority of their time sedentary, home-based programmes to reduce sitting time may be a viable health improvement approach.