If you’re wondering about your fitness heading into the new racing season, Reese Hanneman has a workout for you. The session—a long threshold interval peppered with 30-second all-out sprints—will give you a good idea of whether you’re ready to rock, or whether you’ve got some more work to do before pulling on a bib. “It’s a good one of those eye-opening workouts,” Hanneman said. Hanneman has only done this session once, in mid-October with the...