My iPhone is loaded with fitness apps and on almost all of them, you can upload your workout stats and route to Facebook or send a link to Twitter. You can train virtually for an upcoming event with a buddy in a different time zone, or electronically prove your bragging rights for the century ride you did on a whim. Social networking your fitness life is also a means of holding yourself accountable quite publicly. Folks do this with weight loss all the time — there is even a scale that will tweet your weight daily.
Even Biz Stone, co-founder of Twitter, uses the medium to ensure he has fitness follow through. He recently explained how he uses Twitter for exercise motivation in Runner's World. "Once you promise [on Twitter] that you're going to run this weekend, then people who follow you will say, 'So how'd it go?' it's enough pressure to get you going."
What about you . . .