People who work with friends on social networking tools tend to be more active . Some even let them track you during the workout or , for example , a big race . Tightly connected , supportive communities have popped up for apps like RunKeeper and tools like Facebook . These help encourage people to work out and keep them motivated .
People who work with friends on social networking tools tend to be more active . Tightly connected , supportive communities have popped up for apps like RunKeeper and tools like Facebook . These help encourage people to work out and keep them motivated .