Alongside the traditional 400m, 800m, and 1600m or mile races, the winter months introduce shorter distances, such as the 500m, 600m, and 1000m. That added variety gives these athletes far more flexibility, allowing them to explore different combinations that blend speed and strength.
As we head into the penultimate weekend of competition this month, several runners have already doubled up in both the 400m and 600m, with some appearing on the national leaderboard in each event.
Take a look at the top boys in the country, ranked by their combined performances in the 400m and 600m.