Accelerometer-Measured Daily Activity Levels and Related Factors in Patients With Heart Failure.
Bunny J Pozehl, Rita Mcguire, Kathleen Duncan and 6 others
PMID 29538050WHAT IT FOUND
Heart failure patients averaged 10.2 minutes of moderate-to-vigorous activity daily; only 12.6% met 150 minutes weekly.
Lower activity was linked to anxiety, worse symptoms, and poorer function.
Key findings
01Participants averaged 10.2 ± 10.5 minutes of moderate-to-vigorous physical activity per day and 304 ± 173 kcal of physical activity energy expenditure per day.
02Only 23 participants (12.6%) met 150 minutes of moderate-to-vigorous physical activity per week.
03Higher activity was associated with male sex, Caucasian race, NYHA class II, fewer symptoms, lower comorbidity, lower anxiety, more positive exercise attitudes, greater self-efficacy, and better physical function.
STILL TO COME
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What it does not show
Cross-sectional correlational data cannot show that anxiety, attitudes, or self-efficacy cause low activity, or that increasing activity would improve symptoms or function. Participants were selected from an exercise trial and excluded people with decompensated heart failure, unstable angina, recent cardiac events, pregnancy, or conditions preventing exercise, so results may not apply to all heart failure patients. Twenty-two of 204 baseline subjects were excluded for incomplete accelerometer wear, and only two sites were used. The sample had stable pharmacologic therapy and mostly NYHA class II or III disease; it may not represent sicker or less stable patients.
Declared interests
The supplied metadata lists NIH extramural research support. No conflict-of-interest declaration is provided in the supplied text.
The easy way to misread this
Do not read these associations as evidence that an exercise program works or that anxiety causes inactivity. The study measured baseline activity in a selected heart failure trial sample and cannot establish cause.