Key result
Five activity measurements fail to increase MVPA but suggest ~447 more daily steps in CHD.
Why the study?
Physical activity levels of cardiac rehabilitation attendees with CHD are low, motivating an evaluation of whether measurement frequency influences physical activity.
Does a higher frequency of physical activity measurement (5 vs 2 times over 24 weeks) increase daily minutes of moderate-to-vigorous physical activity in insufficiently active cardiac rehabilitation attendees with CHD?
Does a higher frequency of physical activity measurement (5 vs 2 times over 24 weeks) increase daily minutes of moderate-to-vigorous physical activity in insufficiently active cardiac rehabilitation attendees with CHD?
A more frequent brief physical activity measurement intervention (5 vs 2 times over 24 weeks) did not significantly increase moderate-to-vigorous physical activity in cardiac rehabilitation attendees.
BackgroundPhysical activity levels of cardiac rehabilitation attendees with coronary heart disease (CHD) are low.This study examined whether frequency of physical activity measurement (Measure It!; self-report and step-tracker daily steps; <5min) influenced ActiGraph accelerometermeasured physical activity in insufficiently active cardiac rehabilitation attendees with CHD. MethodsThis two-arm multicentre randomised trial with concealed allocation and blinded assessments included cardiac rehabilitation attendees (n=190) randomised to either 2 or 5-physical activity measurements (2-PAM or 5-PAM) over 24-weeks.The primary outcome was daily minutes of moderate-to-vigorous physical activity (MVPA; accelerometry).Secondary outcomes included daily steps (accelerometry), body-mass-index, waist circumference and quality-oflife (AQoL-6D). ResultsAdjusted point estimates of effect for change in MVPA (Cohen's f = 0.05) and daily steps (Cohen's f = 0.14) were higher at 24-weeks for the 5-PAM group than 2-PAM group but did not reach a-priori statistical significance at this small-medium effect size.For daily steps (difference-in-difference 447 steps/day, 95% CI: -44-to-938, p=0.075) the observed effect may be considered a clinically meaningful margin.Quality-of-life significantly improved within groups over time (p<0.001).Most participants received the Measure It! intervention as intended (2-PAM 2-measures: 76% (n=71/94); 5-PAM 4-measures: 92% (n=87/95). Conclusion
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Freene et al. (2026) studied this question. Five physical activity measurements over 24 weeks did not significantly increase moderate-to-vigorous activity but yielded a clinically meaningful 447 daily step increase (p=0.075) in CHD patients.
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