Hazel Clark's Guide To Champion 800m Training MileSplit Staff Jan 15, 2026 First Prev Page 4 of 4 Hazel Clark's Guide To Champion 800m Training MORE INFORMATION: Nike Running Camps with Hazel ClarkPennington School | Lawrenceville School | The Hackley SchoolPublisher note: Originally published in 2017. Updated for 2026. First Prev Page 4 of 4