Fat Adapted Athlete: From PREDIABETES to PEAK Performance at 50
➡️ Join The Endurance Lab Inner Circle on Telegram
👉 https://t.me/TheEnduranceLabInnerCircle
Can you become a fat-adapted endurance athlete while still using carbohydrates to race fast?
In this episode, I sit down with Sami Inkinen, endurance athlete, age-group triathlon world champion and co-founder and CEO of Virta Health, to explore how he went from discovering he had prediabetes despite being extremely lean and fit to dramatically increasing his fat oxidation and, at age 50, producing some of the best endurance performances of his life.
Sami explains how changing his nutrition increased his measured maximum fat oxidation from roughly 200 to 800 calories per hour, why he describes becoming highly fat-adapted as becoming “bonk proof,” and how he combines a low-carbohydrate lifestyle with strategic carbohydrate intake during hard training and racing.
We go deep into fat adaptation, metabolic health, low-carb and ketogenic diets for endurance athletes, carbohydrate periodization, fat oxidation, training after 40 and 50, prediabetes in athletes, recovery, longevity and endurance performance.
Sami also breaks down his “live low, race high” approach: eating mostly real foods and minimizing carbohydrates outside training while deliberately using carbohydrates during demanding workouts and competition.
Importantly, Sami repeatedly distinguishes his personal N=1 experience as an athlete from established scientific evidence and from his professional work at Virta Health. Low-carbohydrate and ketogenic approaches to endurance performance remain an actively debated area of sports nutrition research, and individual responses can vary.
🔥 FIND YOUR TRUE ZONE 2 WITH TYMEWEARTymewear Vita Pro measures your breathing in real time to identify your individual physiological thresholds and help you train at the intensity you actually intend to train at.
➡️ Endurance Lab listeners SAVE $100 OFF the Tymewear Pro Training membership
Code: E-LABTW26
👉 https://www.tymewear.com/E-LABTW26
➡️ Listen to my conversation with TimeWear founder Anar Larson:
👉 https://open.spotify.com/episode/5sz25EZjGUHoGSaA38nHwM
➡️ Virta Health
👉 https://www.virtahealth.com/
TIMESTAMPS
00:00 Can midlife athletes have metabolic health AND peak performance?
01:22 How did an elite endurance athlete discover he was prediabetic?
09:01 Why are endurance athletes developing prediabetes?
16:29 What did Sami change after discovering he was prediabetic?
22:01 How he increased fat oxidation from ~200 to ~800 calories/hour
25:08 How low-carb does Sami actually go?
37:47 What does Sami eat day to day?
44:18 How does he use carbohydrates during hard training and racing?
52:11 Is Sami really performing better at 50 than when he was younger?
56:27 How has recovery changed with age?
58:20 Why Sami founded Virta Health
1:08:52 Sami’s training and nutrition framework for midlife endurance athletes
ABOUT THIS EPISODEThis conversation is for educational and informational purposes only and is not medical or individualized nutrition advice. Speak with an appropriately qualified healthcare professional before making significant dietary changes, particularly if you have diabetes, prediabetes, take glucose-lowering medication, or have another medical condition.
