Читать книгу Sleep: The secret to sleeping well and waking refreshed - Prof. Idzikowski Chris - Страница 84

One of the most common breathing-related sleeping disorders is asthma, which is often caused by allergens found in the faeces of house dust mites. The relative humidity of your surroundings will be the key factor that influences the prevalence of these mites, which can live in conditions where there is no liquid to drink as they can extract sufficient water from the environment if the humidity is high enough. Surveys in temperate climates show that mite prevalence varies according to seasonal fluctuations in indoor humidity. Mites are absent or rare in homes in dry climates unless use of evaporative coolers adds the moisture to the air that is necessary for their survival. Maintaining average daily indoor humidity below 50 per cent will prevent mite population growth and subsequent sleep-disrupting allergens. Even if humidity is lowered, it can take several months for all the allergens to disappear, however.