Guides

Fitness, habit and sober challenge ideas to do with friends, with how long each should run and the rules that keep everyone going.

Group size, rules, strikes, rest days and nudges: a practical playbook for group challenges that make it to the last day.

How to hold a better plank, the full 30-day schedule, what changes week by week and how to stop quitting on Day 10.

Planning, social situations, drinks to order and how to handle a slip: a month off alcohol is easier together.