In theory, it costs nothing — you slap on a pair of trainers, open your front door and off you go. Or so I thought when I began the NHS Couch to 5k programme last autumn. It’s a free podcast you can download at iTunes, which promises to teach complete "I have been busy catching up on all the stuff I missed on TV over Christmas to keep me occupied! I want to download the NHS Couch Potato to 5k app but I'm not going to do that until February. I know that normally when people start something in January I started with running, getting up at 6am and throwing myself round a park. I downloaded all the free apps, such as the NHS’s Couch To 5K and Runkeeper, and got vaguely competitive with friends online; I bought LCD Soundsystem’s running album .