The 10k
Note
This page is a synthesis; the individual claims are graded on the pages they link to. The energy demand of the 10k is well measured and its training is well described in elite practice, but the exact balance of threshold and VO₂max work is coaching judgement rather than trial-tested.
The 10k marks the shift from the VO₂max events to the threshold events. It is almost wholly aerobic, in the region of 97 to 99% (Spencer & Gastin 2001; Baker et al. 2010), and for the fastest runners, at around 27 to 35 minutes, it is the longest race still run close to the VO₂max ceiling. A 55-minute 10k is raced well below that, nearer a steady endurance effort, so the ceiling framing is an elite one (distance-specific training). From here on, the lactate threshold takes over as the quality that matters most.
What decides it
The 10k sits just below the threshold for a strong runner and right around it for many. The defining quality is the ability to hold an effort a fraction under the lactate threshold for half an hour or more without tipping over it, where the pace would become unsustainable. VO₂max still sets the ceiling and running economy still translates fitness into pace, but compared with the 5k the emphasis has shifted from the ceiling itself toward the fraction of it that can be sustained.
Training approach
On the usual easy-volume base (Haugen et al. 2022), threshold and tempo work becomes the centre of gravity: the volume of work at and just below threshold rises, because that is the quality the race rewards. VO₂max intervals stay in the programme to hold the ceiling up, while pure speed work narrows to sharpening rather than development. Specific endurance is built with longer continuous runs and cruise intervals at close to 10k pace. The distribution leans pyramidal, a large base tapering into a smaller amount of hard work (Casado et al. 2022), the distance-specific pattern as the events lengthen.
Racing it
Aim for even effort and resist the fast start; held a touch too hard early, the second 5 km unravels (Abbiss & Laursen 2008). Glycogen is not usually a limiter over a race this length, so in-race fuelling is unnecessary for most and carbohydrate loading offers little; a sound pre-race meal covers it. See race pacing.