The Injury Calendar: When Things Go Wrong in a 5K Block

Running injuries aren’t randomly distributed across a training block. They cluster.

Different tissues fail at different points, for reasons that are fairly predictable once you know the pattern — and knowing which week you’re in tells you what to watch for before it becomes a problem.

Here’s the map of an eight-week 5K build, week by week, with what typically shows up and what it means.

But first, one finding that changes how you should read the whole thing.