Global Trends in the Relationship Between Chronic Air Pollution Exposure, Physical Activity and Lung Function in Youth Aged 5-18 Years With and Without Asthma: A Systematic Review.

Sports Med Open · 2025 · PMC12095106 · PMID 40399510

Europe PMC DOI

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a negative trendno p-value reported

failed to reach statistical significanceno p-value reported

[ 61 ] observed a negative trend in PEF with increasing exposure to PM 1 and PM 2.5 , although the relationships failed to reach statistical significance.

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of borderline significanceno p-value reported

While the duration of this lag period and the associated influencing factors require further research, particularly due to results being of borderline significance, the exposure effect appears to be greatest up to three- or four days post-exposure.

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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.