Paces and race fitness
Why your paces changed
As your race fitness moves, your paces follow it, a small step at a time: at most two points of race fitness in any seven days, so one great or bad run never swings your plan.
After a long break your paces ease off, and Home says so once. A new plan takes your race fitness in full until a run counts for one of its days.
Your goal and your plan move only when you choose, or when the organisers of a race you picked move its date. Your paces follow your race fitness, a small step at a time.