Returning runners fail in a specific way.
Your cardio comes back faster than your tendons, bones, and connective tissue. A beginner plan bores you into skipping ahead; your old training plan overloads the structures that detrained the most. Either way, the plan was not built for the runner you are right now.
- Aerobic fitness returns in weeks; tissue durability takes longer.
- Boredom with a too-easy plan causes exactly the load spikes that end comebacks.
- A comeback plan has to keep re-checking where you actually are.