Changing your weekly mileage

You can change one week’s running without rebuilding the whole block, or change the standing request that shapes all of the weeks ahead.

Say which result you want. “Make next week 25 miles” is a one-week change. “Build the rest of the block from the mileage I am running now” changes the request used for a broader rebuild.

Reshaping one week

When you change a current or future week’s total, the week is laid out again using the plan’s run days, harder sessions, long-run placement and where you are in the training block. The total is not just written onto the week while the sessions stay unchanged; the upcoming sessions are rebuilt to add up to it.

Days that have already passed and sessions you manually marked complete stay put. The requested total cannot be lower than that locked-in running, and a past week cannot be rewritten. The result also cannot be more than about five percent above the plan’s peak week.

Reshaping replaces the upcoming sessions on the affected days, so a custom session there does not carry through automatically. It changes that week only; it does not raise the peak or cause later weeks to follow the new number.

Changing the remaining block

For a lasting change, update the saved choices that shape your plan, such as starting mileage, peak mileage and run days, and ask to see the rebuilt future.

Your coach first shows a preview, so nothing changes yet. It may not match the requested numbers exactly. The plan still accounts for its weekly growth limit, the time until your race, the available block length and your recent training. A requested peak can remain saved even when this block does not reach it.

Read the explanation instead of treating the saved request as a promise. It shows the mileage the block can currently schedule and why it stopped there. If the starting point looks more conservative than the recent training you described, tell your coach before approving; you can leave the active plan unchanged and revise the request or describe that recent training more clearly.

Be specific about the evidence

When asking for more, include the recent weekly total, longest run, number of run days and how long that pattern has been comfortable. When asking for less, say whether the change is temporary or should reshape the rest of the block. That distinction helps your coach avoid rebuilding eight weeks to solve one busy week—or treating a lasting change as a one-off edit.