The gym is a fifteen-minute detour. The sweet shop is on the way home. You have been calling that a willpower problem for years.

It is a routing problem.

Every January, gyms across the country fill in the first week and empty by the third — at roughly the same rate, every year. That is not millions of people simultaneously running out of character. That is a design that was always going to fail on schedule, adopted by people who were told the failure would be theirs.

This is the part of health nobody sells you, because there is no product in it. Not a diet. Not a plan. The physical and social architecture that decides what you do on the days you have decided nothing.

Inside, you will:
- redesign the three metres around you that make movement likely or impossible
- build a routine that survives travel, illness and a bad fortnight
- fix sleep by changing the room rather than the intention
- eat well through festival season without treating Diwali as a compliance failure

For anyone who has started again in January more times than they would like to count.

The Gamified Body is behaviour design, not medical advice. Please check with a doctor before changing how you eat, move or sleep. If food, weight or exercise has become a source of distress, please speak to a qualified professional; support options are named inside.