If you have a half marathon or marathon on the horizon, or even a 10K , it might seem counterintuitive to go out and train your body to run 100 meters as fast as you can. But even if you’re gearing up for a super-long endurance event, adding workouts with the briefest of intervals into your schedule can improve many aspects of your running over the long haul. “Sprints are always important, no matter what distance you are training for,” says Jenna Wrieden, an assistant coach with Hoka NAZ Elite . “Sprint workouts as a whole help improve your efficiency, power, neuromuscular development, posture , and form better than any other workout an athlete can put themselves through.” Keep reading for everything you need to know about how to do sprint workouts, plus two sample sessions to add to your routine . What are sprint workouts? Sprint workouts are a type of speedwork incorporating repeats of somewhere between 15 to 60 seconds at your max speed—after a slow warmup to prep to your muscles to work hard, of course.…