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Ask Mario: Speed Workouts During Marathon Training?

Mario Fraioli describes if, when and how to incorporate shorter speed workouts into your marathon training program.


Hi Mario,

I’m currently training for a marathon in mid-November and I’m trying to run a personal best … and I was wondering IF, WHEN, and HOW OFTEN and HOW FAST I should be doing TRUE speed workouts like 200s & 400s?

Thank you for your help/advice.

Sam K.



Great question heading into fall marathon season. While the marathon is a largely aerobic endeavor, there is certainly a time and place for shorter speed workouts such as 200- and 400-meter repeats in your training program. Intervals of this length are great in the early stages of a training cycle for improving mechanics, maintaining turnover and developing efficiency—three things that will make running a marathon pace feel that much easier as the race gets closer.

Long runs, marathon-pace efforts, tempo runs and long intervals are the training cornerstones for a 26.2-mile race, but true speed workouts at 5K pace or slightly faster help lend support to those key components. For the marathoners I coach, I’ll prescribe shorter intervals in the range of 200 to 600 meters (or 30 seconds to two minutes in duration for runners without access to a track) roughly once every 10 days in the 8 to 16 weeks before a goal race. This is just enough of an emphasis for the workouts to be of benefit without taking away from the strength-building sessions necessary for race-day success.

RELATED: What pace should my easy runs be?

In your case, being 12 or so weeks out from a mid-November marathon, now is the perfect time to start sprinkling some of these shorter workouts into your weekly routine. Where to start? I recommend getting your feet wet with a mixed bag of intervals: 4 sets of 600m-400m-200m @ 5K race pace or slightly faster (5-10 seconds per mile, tops!) with one minute to 90 seconds jogging recovery after each faster effort. Take 2 to 3 minutes in between sets. This will give you 3 miles worth of solid work at much faster than goal marathon race pace.

As the weeks progress, vary your workouts in both intensity and duration. Add an additional set or two to the workout described above. Also, a classic set of 12 or 16 x 400m at 5K race pace or a few ticks per mile faster with equal recovery time is a great Vo2 max session. On the shorter side of things, 16 x 200m @ 3K race pace (5K race pace minus about 15 seconds per mile) with 60-90-second recoveries will help you work on your turnover and tucker you out at the same time.

RELATED: Don’t Let Marathon Training Steal Your Speed

Within 8 weeks of race day, I like have my athletes tack on some shorter, faster intervals at the end of a tempo run or longer interval session. For example, try finishing off an 10-mile tempo run at goal marathon pace with 10 x 30-second intervals at 5K race effort—not an easy assignment on tired legs! Or, following a session of 3-4 x 2 miles at half marathon pace with 4 to 6 x 400m at 5K pace with 60-90 second recovery jogs between reps. Workouts like these help offset staleness and will teach you to recruit fast-twitch muscle fibers when your legs are zapped.

One last thing to keep in mind when going shorter and faster: keep an eye on your form! If you’re straining, overstriding or otherwise falling apart toward the end of the workout, you’re going too fast. Either slow it down or put off the workout until another day. You want to maintain fluid form throughout the workout and finish feeling strong and sharp.

Best of luck,


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