A new study shows that asthma and allergies are more common among teens who prefer to stay up late and wake later in the morning, compared to those who sleep and wake earlier. Asthma symptoms are known to be strongly linked to the body’s internal clock, but this study is the first to examine how individual sleep preferences influence asthma risk in teenagers. Researchers say the study reinforces the importance of sleep timing for teenagers and opens up a new channel of research into how sleep affects teenagers’ respiratory health. The new findings are published in the journal ERJ Open Research. 
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