Identifying the Effect and Working Mechanisms of MyPlan 2.0 in Older Adults

A Randomized Controlled Trial to Identify the Effect and the Working Mechanisms of MyPlan 2.0, a Self-regulation-based e- and mHealth Intervention Targeting Physical Activity and Sedentary Behaviour, in Older Adults

The aim of this study is to investigate whether and how 'MyPlan 2.0' helps older adults to be more physically active or less sedentary. Two groups will be created, an intervention group and a waiting-list control group.

The aim of this study is to investigate whether and how 'MyPlan 2.0' helps older adults to be more physically active or less sedentary. Two groups will be created, an intervention group and a waiting-list control group. Both groups will be tested during three testing waves: pretest, posttest and follow-up test. Only the intervention group will be given acces to 'MyPlan 2.0'. 'MyPlan 2.0' consists of a website and mobile application targeting physical activity and sedentary behaviour. The intervention has a duration of five weeks.

physical activity, sedentary behaviour, eHealth, mHealth, self-regulation, behaviour change techniques

Participants will not receive the e- and mHealth intervention 'MyPlan 2.0', but will be given access to the intervention after all testing phases.

MyPlan 2.0 consists of five sessions. During these five sessions the following behaviour change techniques are used to motivate users to be more physically active or to sit less: exploring risk perceptions and perceived benefits, exploring social support, providing feedback, action planning, coping planning and monitoring.

Change in amount of total, light and moderate-to-vigorous physical activity, measured via accelerometers

Change in self-reported total, moderate and moderate-to-vigorous physical activity (PA) as well as total work-related, transport-related, household-related and leisure time PA.

Change in amount of total, light and moderate-to-vigorous PA well as total work-related, transport-related, household-related and leisure time PA will be measured via the International Physical Activity Questionnaire (IPAQ). The IPAQ measures physical activity in four domains: work, transport, household and leisure time. Higher scores indicate higher levels of physical activity. For each scale the minimum value is 0. We will use the method described by Dubuy et al. (2013) to truncate the data.

Change in amount of total sitting time, measured via the LASA sedentary behaviour self-report questionnaire. The total score is calculated by summing all 10 items.The minimum value is 0 and the maximum value is 24 hours. However, data will be truncated at 16 hours.

Change in amount of self-efficacy to change behaviour, measured via 5 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the five items will be considered the final score.

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months)

Outcome expectancies regarding the behaviour change, measured via 5 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the five items will be considered the final score.

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months

Risk perception about the behaviour, measured via 4 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the four items will be considered the final score

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months

Amount of intention to change the behaviour, measured via 3 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the three items will be considered the final score.

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months

Amount of action planning for behaviour change, measured via 3 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the three items will be considered the final score.

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months

Amount of coping planning for behaviour change, measured via 3 validated items (questionnaire). These items were created by the involved research groups. For each item, the scale ranges from 1 to 10. The average score on the three items will be considered the final score.

Pretest, after week 1, after week 2, after week 3, after week 4, posttest (6 weeks), and follow-up (6 months

Inclusion Criteria: Have access to internet Being computer literate Exclusion Criteria: non Dutch speaking

Poppe L, De Bourdeaudhuij I, Verloigne M, Shadid S, Van Cauwenberg J, Compernolle S, Crombez G. Efficacy of a Self-Regulation-Based Electronic and Mobile Health Intervention Targeting an Active Lifestyle in Adults Having Type 2 Diabetes and in Adults Aged 50 Years or Older: Two Randomized Controlled Trials. J Med Internet Res. 2019 Aug 2;21(8):e13363. doi: 10.2196/13363.