A study shows that activity is 'contagious' of social media. Researchers at the Massachusetts Institute of Technology found that people who post of their exercise on social media sites motivate people to be more active. Researchers tracked the exercise of 1.1 million runners over a five-year . They looked at the runners' social network use, distance, time, and the calories burned. The researchers concluded that sharing exercise on social media can inspire others to exercise more, harder and more .
The includes accounts of how reading about a friend's exercise can be . It said: "An additional kilometre run by friends can inspire to run an additional three-tenths of a , and an additional ten minutes run by friends can inspire someone to run minutes longer." Social media improved the performance of , less in runners, and of those who were showing signs of overtaking a friend's performance. A researcher said: "In , if you run more, it is that you can cause your friends to run ."