HeyJaredThe Science of Maximal Athletic Development
Early chapter-by-chapter access to my book on the science of athlete development
- Indexed issues, last 90 days
- 6
- Latest publication
- Sep 9, 2026
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- Jul 9, 2026
Latest issues
MSMRL 18: Stay in the Game - Justin Daerr on the Real Secret to Long-Term Performance. (opens the original)
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Justin Daerr’s story is one of the better examples I know of what long-term development actually looks like.He didn’t arrive in triathlon as a prodigy. His first Ironman took him almost 13 hours. A few years later, he brought that down to 9:20. And, some more years later, he became a professional, accumulated podium finishes, and - on his 30th Ironman start(!) - won Ironman Boulder.But the highlight of Justin’s story - and the core point that I hope the listeners take from our chat - the impress
What Does It Mean To Be Strong? (opens the original)
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Put a powerlifter, a gymnast, a sprinter, a rock climber, a rower and an Ironman athlete in the same room and ask a simple question...Who is the strongest?<img alt="" class="sizing-normal" height="799" src="https://substackcdn.com/image/fetch/
Introducing “The Strength Code” (opens the original)
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<img alt="" class="sizing-normal" height="613" src="https://substackcdn.com/image/fetch/$s_!vgHF!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F09e07c9e-2c20-4e12-af30-d0535d216114_409x613.jpeg"
MSMRL 17: Building an Athletic Life (opens the original)
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A couple of weeks ago, I wrote about Your 50-Year Training Plan - the idea that the most important training ramp isn’t the one preparing you for your next race, but the one that keeps you fit, healthy, and moving for the rest of your life.So, for this episode of MAD Science Meets Real Life, I sat down with Iñaki to take that idea out of the spreadsheet and into the real world.And Iñaki is a particularly good person to have this conversation with.When we first started working together almost 20 y
Your 50 Year Training Plan (opens the original)
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We endurance athletes spend a lot of time thinking about ramps.How quickly should I ramp my mileage for the marathon? How many hours can I add to my next training block? How high can I push my CTL before my next race?These are useful questions. But they aren’t the most important ramp.The most important ramp isn’t the one that takes you from 40 to 60 miles per week over the next three months. It’s the one that takes you from being a healthy, active 30-year-old to a healthy, active 70-year-old!It’
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