Most adults need 7–9 hours of sleep a night to help the brain and body function properly. Lack of sleep can contribute to high blood pressure, diabetes, heart attack, heart failure or stroke. Other potential problems include obesity, depression, impairment in immunity and lower sex drive.
The city that gets the least amount of sleep a night is Berlin, Germany, with an average of six hours a night or one hour under the daily recommended. Manila, Philippines, comes in second place, with just 6.3 hours of sleep a night. Seoul, Korea, at 6.4, follow this.
Coming in as the sleepiest city, we have Buenos Aires, Argentina, with citizens sleeping ten hours a night on average, one hour over the daily recommended. Mexico City and Beijing, China, average nine hours a night.
But if your body is not getting enough sleep or even too much sleep, it can negatively affect your mental health. Side effects include lack of concentration, changes in mood, disorientation, and a bad memory.
The body can also be affected due to sleep deprivation. Changes to the appearance include dark under-eye circles, a breakout of spots and puffy skin. Headaches are also common, increasing weight gain, a weakened immune system, and lowered libido.
The report by Preply also discovered which cities around the work work the longest hours. Coming in a number one city that works the most hours in Hanoi, Vietnam, with citizens working on average 2,691 hours, or 10.5 hours a day. Mexico City, Mexico, came in second place as the city which worked the longest hours, 2,622 in total for the year.
On the other side, we have Stockholm, Sweden, which work the fewest hours of the year, an average of 1,424. This is followed by Luxembourg, which works on average 1,427. London, UK is positioned in the middle with average working hours equating to 2,003 hours a year.