Tune-up races don't improve marathon time

A tune-up race is a shorter event you race during marathon training, as a rehearsal for the day. In one study of marathon runners, racing one in the 16 weeks before the marathon didn't make anyone faster. The runners who skipped them finished just as well. The evidence is observational, so read it as a strong hint rather than a settled rule.

Why it works

Any gain from practicing your pace or checking your fitness probably gets cancelled out. Racing tires you and costs recovery days. It also crowds out the training that matters more: long runs, weekly mileage, and the taper.

What it means in practice

There's no good reason to add a tune-up race just to make the marathon faster. If you do run one, treat it as pacing practice or a fitness check rather than a shortcut to a better time. Keep it to a single race in the build at most, and schedule it early enough to recover fully.

The evidence

• Foster C, Hettinga F, Lampen J et al. (2012). Exercise training for performance and health. Deutsche Zeitschrift für Sportmedizin.

  In the 16 weeks before a goal marathon, 39.3% of runners ran a tune-up race or a self-administered time trial. Their finish times matched those of runners who skipped the tune-up entirely. Foster and colleagues frame this as the first formal test of a practice coaches recommend widely but had never evaluated. It is observational, so it can't rule out other benefits like pacing or skill practice.

• Doherty C, Keogh A, Davenport J et al. (2020). An evaluation of the training determinants of marathon performance: A meta-analysis with meta-regression. Journal of Science and Medicine in Sport.

  Across the pooled marathon studies, weekly volume and longest-run distance were the strongest training-side predictors of performance. Neither tune-up race exposure nor race-pace specificity emerged as an independent predictor. Volume and long-run distance are the dominant levers; the secondary factors stay less clearly defined. Two caveats temper the synthesis: the source studies were heterogeneous and relied on self-reported training.

Why we call confidence medium

Foster 2012 tested this in a group of marathon runners. The 39.3% who did tune-up efforts finished no faster than those who didn't. The study watched runners rather than assigning them at random, so self-selection could still be hiding in the result. A separate meta-analysis (Doherty 2020) points to weekly volume and long-run distance, not tune-up racing, as the training factors that most predict marathon performance.

Where it applies

Recreational marathon runners. The picture is less clear for elite marathoners, or for shorter goal races, where the trade-off may play out differently.

Does not apply to: events under marathon distance where tune-up race is the goal race itself (e.g., a 5K runner racing a 5K time trial).

Plans that respect this

Plans that scored well on the rubric measures informed by this claim.

• Galloway Time-Goal 5K — Sub-15
• Galloway Time-Goal 5K — Sub-17:30
• 10-Week Run Your First 10k (3 days)
• 10-Week Run Your First 10k (4 days)
• 10-Week Run Your First Half Marathon (3 days)
• 10-Week Run Your First Half Marathon (4 days)
• 10-Week Sub-1:30 Half Marathon (4 days)
• 10-Week Sub-1:30 Half Marathon (5 days)
• 10-Week Sub-1:30 Half Marathon (6 days)
• 10-Week Sub-1:45 Half Marathon (4 days)
• 10-Week Sub-1:45 Half Marathon (5 days)
• 10-Week Sub-1:45 Half Marathon (6 days)

Related claims

• Fast-finish long runs are tradition, not proof