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