Make a pledge to average a certain amount of running per week. Break the pledge and we'll charge you real money.
Keep on the move! Track your workouts with Runkeeper and Beeminder will automatically keep your graph up to date. All you've got to do is sweat.
Beeminder will warn you if you're in the danger zone. As long as you don't let your dots cross the bright red line, your money is safe! (Details on our blog.)