Mediators of Physical Activity Behavior Change in the "Girls on the Move" Intervention.
Lorraine B Robbins, Fujun Wen, Jiying Ling
PMID 30882562WHAT IT FOUND
The school-based activity programme did not raise girls’ moderate-to-vigorous activity at the end or nine months later.
Changes in enjoyment and social support were linked to short-term activity gains.
Key findings
01The intervention’s total effect on girls’ moderate-to-vigorous physical activity was not significant at post-intervention or at nine-month follow-up.
02In the path model, changes in enjoyment and social support were significantly associated with short-term activity change.
03The intervention package increased perceived benefits, enjoyment, social support, and motivation in the path model, while perceived barriers were higher in intervention girls.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The sample came from a limited geographical region, so the findings may not apply to other communities. Survey responses may have been affected by social desirability bias. The intervention combined motivational interviewing, an after-school physical activity club, and an iPad session, so the effect of any single component cannot be separated. The total effect on moderate-to-vigorous physical activity was not significant, so the mediator findings should not be read as evidence that the programme increased activity. This paper is a secondary analysis of a group randomized trial, and the main trial’s activity effects were reported elsewhere.
Declared interests
The paper is marked as research supported by NIH extramural funds. No conflict of interest declaration is included.
The easy way to misread this
Do not conclude that the programme increased physical activity because enjoyment and social support improved. The total effect on moderate-to-vigorous activity was not significant at post-intervention or at nine-month follow-up.