From the Coach guide
Is the plan fitting what you actually do?
Plan follow-through shows how closely your training matches the schedule.
The four-week view
Coach looks back over 4 weeks at planned runs whose dates have passed: how many you logged and, where heart-rate data is available, whether the effort matched the target zones.
What is counted
The count shows runs logged out of runs planned. Scheduled strength sessions count as 50% of a run.
What it tells you
This helps distinguish missed sessions from runs done at a different effort, so you can see what needs adjusting. It measures follow-through on the plan, not motivation or mental concentration.
When it is available
The measure needs at least 4 planned runs whose dates have passed.