Jeff Dean has spent decades flexing his brain to solve some of computing’s hardest problems. Turns out the Google legend and UW computer science alum has been pushing his physical limits just as hard.
In an exchange on X this week, the former Google chief scientist — who recently left the tech giant after 27 years to launch the scientific AI startup Discovery Loop — laid out a weekly training routine that looks less like a tech executive’s calendar and more like a triathlete’s.
In addition to running or biking to work three or four directions a week, Dean, 58, says he’s mixing in a couple trips to the gym, a couple yoga sessions, and a couple games of soccer in a 25-and-over league. He also does a longer run or bike ride on the weekend.
We got winded just scrolling through the comments.
People wanted to know how Dean took care of his knees (squishy shoes), whether he came up with great ideas while exercising (definitely), when he showers (at work), and if he sleeps (usually seven hours).
In GeekWire’s Slack channel this morning, co-founder John Cook, a longtime soccer player, expressed his own surprise.
“He’s playing soccer twice per week in an over-25 league — that is total bad ass,” Cook wrote. “I can barely run in my over-50 league!”
Dean earned his Ph.D. in computer science from the University of Washington in 1996 before joining Google as employee No. 30. He achieved tech-legend status by helping to build the company’s core computing architecture over nearly three decades.
His new venture, Discovery Loop, is an ambitious public benefit corporation aimed at using AI to automate the scientific method — running thousands of parallel experiments to accelerate breakthroughs in fields like drug discovery, materials science, and machine learning.
Dean’s dive into his exercise routine came up because of a slide he shared at KDD 2026, a conference in Jeju, South Korea. The slide was a play-by-play of his final 48 hours at Google (Aug. 5–7), detailing the whirlwind around his departure and startup launch.
Along with breaking the news to Google colleagues and announcing the launch of Discovery Loop, Dean spent last Wednesday responding to hundreds of well wishes — while squeezing in a yoga session and a soccer game. He went to bed at 2:30 a.m. and was up at 6:30 a.m. Thursday to respond to hundreds more messages.
He was technically unemployed for exactly one second at midnight on Thursday.
He probably spent it stretching.
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