Optimal seating position

In these days a lot of people spend most of their time at office sitting down in a chair almost all the time.The same thing happen when they go home ( check the email, play some video games, watch TV, etc).

So if you want to take care of your body while you sit down you can learn from here that the best position is at 135 degrees, as is the image.The researchers said that when they looked at all test results, the researchers said the 135-degree position was the best for backs, and say this is how people should sit. [ Via - BBC ]