Self-efficacy Mediates the Relationship Between Motivation and Physical Activity in Patients With Heart Failure.
Leonie Klompstra, Tiny Jaarsma, Anna Strömberg
PMID 29189427WHAT IT FOUND
Self-efficacy, not motivation, predicted physical activity in heart failure patients.
High motivation did not increase activity when self-efficacy was low. Clinicians should assess and address barriers to exercise to build confidence, rather than only emphasizing the benefits of being active.
Key findings
01Exercise self-efficacy fully mediated the relationship between motivation and physical activity, meaning motivation alone did not predict activity levels once self-efficacy was accounted for.
02Self-efficacy was significantly correlated with physical activity levels, whereas motivation showed a weaker direct association.
03The model explained 24% of the variance in physical activity, indicating other unmeasured factors also influence behavior.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for RNs
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What it does not show
Physical activity was measured by a single self-reported question, lacking objective validation like accelerometry. The study population was selected from a trial, potentially making them more motivated than the general heart failure population. The model explained only 24% of the variance, suggesting other important factors like social support and comorbidities were not measured. Cross-sectional design prevents causal conclusions.
Declared interests
The paper states it was supported by non-U.S. government funding. No specific conflicts of interest for individual authors are detailed in the provided text.
The easy way to misread this
Do not conclude that motivation is irrelevant. The study shows self-efficacy is the mechanism through which motivation influences activity, so both are important, but self-efficacy is the more direct target for intervention.