BACKGROUND AND OBJECTIVE: Assessing levels and determinants of physical activity as outcome measurements might have an independent effect on participant's physical activity behavior. The objective is to study this effect in a randomized controlled trial (RCT) promoting regular physical activity in Dutch general practice. METHODS: Using a Solomon four-group design, participants were randomized twice. After randomization to a control or intervention-condition at general practice level (N = 29), participants were randomized to a group participating in measurements at baseline, 2 and 6 months (3M-group, N = 361), or a group only participating in measurements at 6 months (1M-group, N = 356). Outcome measures assessed at 6 months included: level of physical activity (self-reported and objectively measured with accelerometry), meeting ACSM/CDC guideline for regular physical activity, stage of change, and determinants of physical activity. RESULTS: Follow-up data on 635 participants (89%) was collected. Statistically significant measurement effects were found for meeting the ACSM/CDC guideline (self-reported), self-efficacy for resisting relapse, knowledge, and on awareness. Other outcome measures showed positive trends, except stages of change. CONCLUSION: Measurements of physical activity affect participant's physical activity behavior, possibly triggered by a raised awareness about their own physical activity level. Implications for future research are discussed, as well as methodologic limitations of the study design.
RCT Entities:
BACKGROUND AND OBJECTIVE: Assessing levels and determinants of physical activity as outcome measurements might have an independent effect on participant's physical activity behavior. The objective is to study this effect in a randomized controlled trial (RCT) promoting regular physical activity in Dutch general practice. METHODS: Using a Solomon four-group design, participants were randomized twice. After randomization to a control or intervention-condition at general practice level (N = 29), participants were randomized to a group participating in measurements at baseline, 2 and 6 months (3M-group, N = 361), or a group only participating in measurements at 6 months (1M-group, N = 356). Outcome measures assessed at 6 months included: level of physical activity (self-reported and objectively measured with accelerometry), meeting ACSM/CDC guideline for regular physical activity, stage of change, and determinants of physical activity. RESULTS: Follow-up data on 635 participants (89%) was collected. Statistically significant measurement effects were found for meeting the ACSM/CDC guideline (self-reported), self-efficacy for resisting relapse, knowledge, and on awareness. Other outcome measures showed positive trends, except stages of change. CONCLUSION: Measurements of physical activity affect participant's physical activity behavior, possibly triggered by a raised awareness about their own physical activity level. Implications for future research are discussed, as well as methodologic limitations of the study design.
Authors: Nicole Simmons; Deborah Donnell; San-San Ou; David D Celentano; Apinun Aramrattana; Annet Davis-Vogel; David Metzger; Carl Latkin Journal: AIDS Behav Date: 2015-10
Authors: Michael P Carey; Theresa E Senn; Jennifer L Walsh; Patricia Coury-Doniger; Marguerite A Urban; Thierry Fortune; Peter A Vanable; Kate B Carey Journal: AIDS Behav Date: 2015-07
Authors: Rebecca K Simmons; Esther Mf van Sluijs; Wendy Hardeman; Stephen Sutton; Simon J Griffin Journal: BMC Public Health Date: 2010-04-30 Impact factor: 3.295
Authors: Eleanor Mann; A Toby Prevost; Simon Griffin; Ian Kellar; Stephen Sutton; Michael Parker; Simon Sanderson; Ann Louise Kinmonth; Theresa M Marteau Journal: BMC Public Health Date: 2009-02-20 Impact factor: 3.295
Authors: Nicholas Graves; Adrian G Barnett; Kate A Halton; Jacob L Veerman; Elisabeth Winkler; Neville Owen; Marina M Reeves; Alison Marshall; Elizabeth Eakin Journal: PLoS One Date: 2009-09-25 Impact factor: 3.240
Authors: Daniel Hind; Emma J Scott; Robert Copeland; Jeff D Breckon; Helen Crank; Stephen J Walters; John E Brazier; Jon Nicholl; Cindy Cooper; Elizabeth Goyder Journal: BMC Public Health Date: 2010-01-04 Impact factor: 3.295