Right now, you can download the Amazon app Couch to 5K (or C25K) for FREE! This app is a training program used to help people go from laying on a couch to being prepared to run a 5K. This app has excellent reviews from Amazon customers and was featured in Glamour magazine. The app starts out slow and builds over time to help your prepare for longer runs. To get this app for FREE, you must have an Amazon Underground account.