Physical activity of men from Wroclaw compared with their discretionary income.
Daniel Puciato
PMID 27799711WHAT IT FOUND
Income groups differed in reported physical activity.
The lowest income group reported the least total activity, and low-intensity and high-intensity activity also varied by income; moderate intensity did not. This is an association, not proof money causes it.
Key findings
01Discretionary income was a factor significantly differentiating physical activity, except for moderate-intensity activity.
02Total, low-intensity, and high-intensity activity differed significantly between income groups, while moderate-intensity activity did not.
03In each income group, low-intensity activity was most common and high-intensity activity least common.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study included only men aged 18–65 living in Wrocław, so it does not show what is true for women, other age groups, or other places. Physical activity was self-reported with a short questionnaire, not measured directly, so answers may be inaccurate or biased. This was a one-time survey, so it cannot show that income caused physical activity or that physical activity caused income differences. The paper describes itself as a pilot study and does not report dropout, non-response, or how missing data were handled. The table shows mean total activity was 573.0 min/week in the middle income group and 554.1 min/week in the highest income group, so the statement that activity increased with income is not fully consistent with its own table.
The easy way to misread this
Do not conclude that increasing someone's income will make them more physically active. This was a one-city survey of men using self-reported activity, so it shows an association, not cause.