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Daylight Saving Time ends at 2:00 am Sunday, November 4th. Here's what you need to know.
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Experts say that the summer time can have adverse effects on your health if you do not sleep normally enough.(Photo: Demaerre, Getty Images / iStockphoto)

Summer time ends and the clocks will "fall back" for an hour this weekend, which will give Americans the feeling of an extra hour in the morning, which will could harm their health.

"Since the institution of the summer time, there is controversy as to whether it meets its objectives or not, and if so, at what cost," said Timothy Morgenthaler, co -Director of the Center for Sleep Medicine, in an email.

Morgenthaler reviewed about 100 medical articles on the potential impact of time change on health.

Here's what you need to know:

To sleep

Earning or losing an hour will likely affect sleep patterns, often from five to seven days, Morgenthaler said. The most notable changes are those who do not sleep regularly enough. People who are deprived of sleep may have problems with memory, learning, social interactions, and overall cognitive performance.

"People have more changes in their drowsiness or sleep quality when we" jump ahead "than when we" fall back, "said Morgenthaler.

More: 10 things you did not know about the time of summer

Heart attack or stroke

According to a study conducted by a member of the University of Colorado in 2014, when Americans lose an hour of sleep in the spring, the risk of heart attack increases by 25%. When the clock resumes this hour of sleep, the risk of heart attack decreases by 21%. (The limited study examined data on hospital admissions in Michigan over a four-year period.)

A preliminary study presented at the 2016 meeting of the American Academy of Neurology suggested that advancing or delaying the time one hour could increase the risk of stroke. Indeed, disrupting a person's internal clock could increase the risk of ischemic stroke, the most common type of stroke, according to the researchers. The data showed that the risk of ischemic stroke was 8% higher two days after daylight saving time.

These studies are two of many studies of these negative health effects, and they do not always paint a complete picture, said Morgenthaler.

Among several studies published between 2010 and 2014, three studies have shown that DST increases the risk of acute myocardial infarction (AMI), but two others have shown that the timing (but not the impact) of Stroke and AMI can be influenced by the DST, "Morgenthaler points out.

Accidents

Many have also studied the impact of time change on car accidents and deaths. The largest studies that correct the volume and activity of driving, as well as the time of day "show no significant effect" on the changes of summer time, said Morgenthaler. Nevertheless, he recommends staying alert while driving or walking near a road, especially early in the morning or late at night after the change.

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