What is the 80/20 rule in CrossFit?

The 80/20 rule in CrossFit is the idea that results are roughly 80 percent nutrition and 20 percent training. It is not a precise formula, it is a reminder that no amount of hard work in the gym outruns a poor diet. Consistent eating and recovery drive most of your progress.

This is a direct answer from the CrossFit BC coaching team. Short version first, then the detail and the local context for training in Vancouver. If you want the same answer applied to your own situation, a coach will walk through it with you in person.