Is your goal realistic, or just fragile?

A marathon goal can be useful and still be too aggressive for the block in front of you. When that happens, the goal is usually not the real problem. The runway is.

Here is a test I use. If the goal only works with perfect sleep, perfect weather, perfect fueling, and perfect legs, it is fragile by definition. A solid goal has margin built in. A fragile one cracks the first time a week goes sideways, and every block has a week like that.

The pace calculator is part of how runners talk themselves into fragile goals. A calculator can give you a target. It cannot tell you whether your week can support the work. Recent race fitness matters more than the calculator you like best, because the race already accounted for the things the calculator ignores.

If goal pace feels like racing in training, I would not add another workout first. I would ask why that pace costs so much right now. Usually the answer is upstream: not enough easy running, not enough volume, not enough recovery, or simply not enough time on this fitness yet.

None of that means lowering your standards. The best intermediate goal is often the one that keeps the bigger goal alive. Easing a target for one block looks like backing off. What it really does is give the body room to build, so the next block starts from an honest read instead of a forced one.

So before you chase a number, ask the honest question: is this goal solid, or does it just need everything to go right?