This Workout Helps 17-Year-Old World Champion Cooper Lutkenhaus Build Record-Breaking Speed

On a typical weekday morning in Justin, Texas, hours before the first-period bell rings at Northwest High School—while most students are still waking up or catching the bus—Cooper Lutkenhaus and his track teammates are already halfway through a workout.The 17-year-old phenom trains before classes begin, knocking out high-intensity sessions that fuel his speed for 800 meters—the event that has made him one of the most exciting teenage middle-distance talents of all time.Lutkenhaus became the youngest male individual champion at any World Athletics event, indoor or outdoor, claiming the 800-meter crown with a blazing 1:44.24 at the 2026 World Athletics Indoor Championships on March 22 in Kujawy Pomorze, Poland.After a first-round exit at the 2025 World Athletics Championships in Tokyo (the youngest American to compete at the event), he put the world on notice in his second appearance on the global stage.In early March, Lutkenhaus won the U.S. indoor title in the 800 (running 1:46.68), then concluded his first season as a pro by winning the U.S. outdoor 800 title in July (with a 1:43.48), and his résumé already included the U-20 American indoor record (1:44.03) and the U-18 outdoor world record (1:42.27) at the distance.One of the key workouts that helps build that world-class speed is deceptively simple.He runs 3 x 300-meter repeats followed by 4 x 150-meter repeats. The session targets the demands of the 800: Running fast while holding form, then finishing even faster than you started. Combined with thoughtful preparation and recovery, it’s a staple in Lutkenhaus’ training, and a workout runners of many levels can learn from and adapt to their own programs.“A lot of times right before I’m going to bed, I’ll think about the workout and I’ll have a little smile on my face,” Lutkenhaus tells Runner’s World. “I’m like, ‘Man, I’m excited.’”The Workout DetailsLutkenhaus often begins speed days with a warmup of two to three miles at what his team calls “upper pace,” an effort roughly 30 seconds per mile faster than his normal 6:30 to 6:40 easy run pace. It’s designed to elevate his heart rate in preparation for the demands of a hard workout. He follows that with a consistent set of drills, helping sync upper and lower body movement and bridge the gap between a slower running warmup and high-intensity speedwork.Those drills include A-skips (Lutkenhaus’s favorite), B-skips, and hamstring scoops (among others), and he finishes his warmup with strides.Key Warmup DrillsAfter the warmup comes the workout. The first half includes the 3 x 300-meter interval set, which Lutkenhaus most recently aimed for 39-second reps, roughly translating to a 1:44 pace for 800 meters. That’s pretty close to race pace for him. For someone trying this workout in their own training, this pace is faster than your mile pace, but not an all-out sprint just yet. Aim for a 9 out of 10 on an RPE scale (where 1 is barely moving and 10 is an all-out sprint).A standing (or slow walking) recovery of about three minutes separates each 300-meter rep of the workout, according to Lutkenhaus’ coach, Chris Capeau, with six minutes of rest between the final 300 and the first 150.The effort finishes with a 4 x 150-meter interval set, with Lutkenhaus most recently targeting 17 seconds for each one, about 1:31 pace for an 800. This is just about an all-out sprint, basically a 9.5 to 10 out of 10 RPE. Four-minute breaks separate these intervals, allowing maximal recovery before each high-speed rep.For a cooldown, Capeau says it’s really only a minimal jog. “The real recovery comes from [Lutkenhaus] taking care of his body as often as possible,” he says.CorosAnaerobic workouts like this one prioritize very slow—even stationary—breaks between reps so athletes get maximal recovery before the next rep, as you can see in this graph from Lutkenhaus’ workout on March 5, provided by Coros.Treat Preparation and Recovery as a PriorityLutkenhaus’s training schedule arrives every Sunday night, when Capeau sends the team a weekly plan of each day’s workout, and Lutkenhaus plans his recovery strategy around those workouts. For him, building speed is only possible if he takes care of his body before and after his runs. “I like to know what I’m going to do before I get there,” he says. “If you know you have a hard workout tomorrow, you have to start getting prepared today.”A normal week for Lutkenhaus involves two quality speed workout days, usually on Tuesday and Friday (or Tuesday and Thursday depending on his race schedule or the intensity of the workouts), separated by easy runs that target his aerobic engine. The weekends are usually reserved for race days and additional recovery time between hard efforts.Part of Lutkenhaus’s preparation for that schedule involves visiting his school’s training room two to three times per day for recovery techniques like foam rolling, icing, and stretching.“Recovery is probably my number-one priority,” Lutkenhaus says. “Sometimes I’d rather be eating lunch with friends, but I know what I need to be doing.”This discipline in recovery sets Lutkenhaus apart from most athletes his age. “This level of commitment definitely benefits him and gives him opportunities on a very large stage,” Capeau says. “He deserves it because he has sacrificed and earned it. He just wants it badly enough to do what it takes, and I don’t think most people can honestly say that.”Lutkenhaus’s 800-meter training schedule is built around high-intensity runs, which is why they appear multiple times per week even when there’s a race coming up. For distance runners, coaches generally recommend just one anaerobic speed session per week in training so you spend more time on aerobic work.The takeaway: Although you may not be able to clock blazing 39-second 300-meter reps, you can approach your speedwork, and training in general, with the same focus on preparation and recovery that Lutkenhaus does.Keep a Narrow FocusOn Thursday, March 5—when he completed the 3 x 300, 4 x 150 workout—Lutkenhaus says he didn’t feel great during his “upper pace” warmup run. “Sometimes the warmup doesn’t go the way you want it to, but you just have to trust the process,” Lutkenhaus says.Instead of lowering his target paces because of a bad start, Lutkenhaus went ahead with his usual drills and strides. By the time the second 300-meter rep came around, he was flying—hitting his goal consistently within a half-second.“The mind is a pretty powerful thing,” Lutkenhaus says. “If you tell yourself you feel bad, your whole workout can go downhill.”Lutkenhaus gets through every workout by pushing mental distractions aside. Rather than letting a tough set snowball into something worse, he narrows his focus to what’s in front of him. “There’s really not much going on [in my mind] during the workout,” he says. “Just focusing on what I need to do on the next rep.”One of Lutkenhaus’s favorite strategies for pushing through hard reps is running with someone else. Often, he will have a teammate jump in for the last 200 meters of his 300. “Seeing someone step right in front of me, my goal becomes just beating him to the line,” Lutkenhaus explains (which he does, of course).That competitive spark, which often produces Lutkenhaus’s fastest reps of the day, is something you can chase in your own running. And without a buddy, if you regularly train on the roads, doing speedwork on a track gives you an actual finish line and a visual benchmark for faster reps.Measure ProgressLast season, Lutkenhaus recalls posting 18-second 150s in this go-to speed workout. Now, he’s consistently hitting 16- or 17-second marks. His 300s have also become smoother and more consistent. “Whenever coach tells me what pace I’m running and I’m able to hit it consistently and feel good, I know we’re in a pretty good spot,” Lutkenhaus says.Repeating the same speed workout over time is a simple but effective way to see improvement. You can do the same by choosing a speed workout you like (and that works with your training plan) and repeating it once or twice a month. Make notes in your training log every time you do it, recording your paces and how it felt. Over time, when your target paces become easier, you’ll know you’re getting faster.Maintain Curiosity and Keep It LightDespite the numerous world records and national titles he’s already achieved, Lutkenhaus is still learning the sport. He studies racing tactics, asks questions, and seeks advice from veterans on the professional circuit. “Any time we go to meets, we’re trying to learn,” Lutkenhaus says.Capeau says that curiosity and drive also make Lutkenhaus special. But he tries to keep things light enough that his star runner still enjoys the sport—and his formative high school experience. “I just follow his lead and trust him to keep being a kid,” Capeau says. “Fans love watching him run because you can feel the joy and love for the sport that he brings. It’s natural for him.”The joyous feeling, combined with a relentless drive behind the scenes, gives Lutkenhaus his race-day edge. “It doesn’t get old,” Lutkenhaus says. “I don’t think it can.”Matt Rudisill is an Associate Service Editor who has been with Runner's World since 2025. A Nittany Lion through-and-through, Matt graduated from Penn State in 2022 with a degree in journalism and worked in communications for the university's athletic department for three years as the main contact and photographer for its nationally-ranked cross country and track & field teams. Matt was also heavily involved in communications efforts for Penn State football, men's basketball, and women's gymnastics. In his role with Runner's World, Matt has interviewed Olympians, world champions, and countless experts in the field to create service content that helps runners of all ages and experience levels train smarter and race faster. When he’s not out jogging, Matt can be found tweeting bad takes about the Phillies or watching movies.