Physical activity in older people: a systematic review.

BMC Public Health · 2013 · PMC3651278 · PMID 23648225

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a slightly increasing trendno p-value reported

PA trends by country and over time In our review, there was a slightly increasing trend towards recommended PA levels in older people in Australia and the US over the last 10 years but a decrease in Brazil.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.