As someone who tends towards overdoing it, I have found the Cool Running couch-to-5k plan exceedingly helpful and would recommend it to anyone who’s feeling the urge to get off the settee and hit the tarmac. My usual running sprints (hah) tend to end up with me slogging to hit an impossible target followed by nearly a week of silly walks as my muscles unstiffen. So far I’ve had no post-training side effects, and every session leaves me hankering to get out there and do the next one. This is an addiction I could get used to.