The biggest mistake you're making with your air conditioner on the cold nights

The chills in the bedroom are far from good, says a Japanese study.

Researchers found that people sleeping in a cold room 14 degrees Celsius, systolic and diastolic blood pressure increased from 6 to 8 percent when they left bed in the morning compared with those who spent the night in a warm room, 24 degrees Fahrenheit [24 ° C].

Blood pressure increases naturally when you wake up, explains coauthor of the Keigo Saeki study, epidemiologist at Nara Medical University in Japan, but when you get out of bed in a cold room, skin blood vessels shrink and your heart beats faster to heat you up, he adds.

This increase in blood pressure lasts at least 2 hours, and if repeated, it can always turn into a serious risk to internal rhythm, says Dr. Saeki.

However, it is not necessarily to keep the air conditioner or heater up all night, a lot of money would be spent, and high temperatures could disrupt sleep, says Dr. Saeki.

Do so! Program the air conditioner to start at 22 degrees, half an hour before you get up. So when you get out of bed, your body will find the same temperature outside.