3x Olympian & Elite Coach: 10 Rules to Better Running After 40 (From 5K to Marathon)

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In this episode of The Endurance Lab, I sit down with Dathan Ritzenhein, a three-time Olympian, former American record holder, World Championship medalist, and head coach of On Athletics Club (OAC), to explore the fundamentals of getting faster—and staying competitive—as we age.

Dathan has experienced some of the most influential training philosophies in distance running, working with coaches including Mark Wetmore, Brad Hudson, Alberto Salazar, and the Hansons. Today, he draws on those experiences to coach some of the world's best runners.But what happens when we apply those elite training principles to marathon runners in their 40s, 50s, and 60s?

We explore why consistency matters more than chasing mileage, how to balance training volume and intensity, why masters runners shouldn't abandon speed work, and whether popular approaches like Norwegian double-threshold training make sense for recreational marathoners.

Dathan also explains how he would structure marathon training for a 50-year-old runner with limited training time who's trying to qualify for Boston, including how to organize workouts, long runs, strength training, and recovery.

Chapters
00:00 Why intensity matters after 40
01:25 Lessons from elite coaches
05:40 Consistency over mileage
11:32 Dathan’s biggest training regrets
16:07 Marathon training for busy runners
20:40 Inside On Athletics Club training
29:30 The long-term approach
36:03 Training for masters runners
43:53 Intensity vs. mileage after 40
47:22 Recovery as you age
50:17 Speed work and strides
55:51 Threshold vs. double threshold
1:00:36 Cross-training for marathoners
1:03:58 Strength training
1:06:09 Lessons from Dathan’s career