How to choose a race goal

Step 1. Work out where you are now

The starting point is a fresh result over a shorter distance: an official race or an honest time trial in the last month or two, not a training run with stops and traffic lights. The Riegel formula multiplies a known time by the ratio of distances to the power of 1.06; for popular conversions, the multipliers below are enough.

For example, a 50-minute 10K gives about 1:50:20 for the half marathon and about 3:50 for the marathon. It is a prediction, not a promise: a fast 10K does not mean you are ready for a half marathon if your longest run was 12 km. The pace calculator does the math, and endurance for 21.1 km is the subject of the half marathon training guide.

Step 2. Understand how much you can gain

There is no universal percentage of improvement per training cycle: "minus 5%" for a beginner after a first race and for an experienced runner close to their limit are different tasks. Work out your time at 2%, 3% and 5% faster and test each option in training.

Confirmation is a fresh race or time trial, several successful sessions at goal pace, a long enough long run and normal recovery after it. One outstanding workout is a reason to update your estimate, not to rewrite the whole plan.

Step 3. Set three goals instead of one

A single number is fragile: heat, wind or heavy legs can easily turn a good result into a mental defeat. The A/B/C scheme defines three meaningful outcomes in advance.

For example, after a 1:52 half marathon: A is 1:46, B is 1:49, C is an even finish without falling apart in the last five kilometers. This shows the structure, not a ready recommendation for every runner with that best. Start at B pace: an aggressive start at A pace can wreck both B and C. Check how you feel after the first third and open up toward A only near the finish. If the day does not go well, switching to C is a decision made in advance, not a surrender.

Check the goal through pacing

In a study of 78,912 Boston Marathon finishers, even pacing was linked to better times in every group. It is an association in the data, not proof that equal splits guarantee a better result. The practical point is simple: your goal should let you start under control, and if the first kilometers already hurt, it is no longer a B goal.

When the goal should not be about time

In your first race at a new distance, after an injury or a long break, a precise prediction creates false confidence, especially without a fresh race or time trial. Goal C can become the main one: finish evenly, do not aggravate pain, test your fueling. Heat, wind and climbing are reasons to switch from a fixed pace to a range or to effort in advance.

Recheck your goal before the race

Two or three weeks before the race, compare your tempo runs, long runs and recovery with what you assumed at the start. If goal pace is consistently harder than planned, move B. If training is consistently going better, you can bring A closer without changing the first kilometers of the race.

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