Some Work, All Play 296. How To Use Electrolytes, Zone 2 Problems, Strange VO2 Max Measures, The Weird World of Probiotics, and AI Training Thoughts!
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Feb 3, 2026 Practical tips for using electrolytes in races and how sweat-sodium varies between athletes. A quirky discussion of a new probiotic study linking gut microbes to activity and fatigue. Skepticism around an extreme VO2 max claim and odd measurement quirks. Short takes on AirPods heart-rate data, AI for training plans, Zone 2 pacing pitfalls, bike vs elliptical training, and parenting trade-offs.
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Carousel Of Joy Visit
- David and Megan visited the Carousel of Happiness in Nederland, Colorado and described the deep, childlike joy it created.
- They used the visit to introduce the episode's playful tone and connect with listeners emotionally.
Return-To-Run Fist Pump
- David returned to running after a foot issue and celebrated small progress with fist pumps on the treadmill.
- He emphasized not letting fear dictate return-to-run decisions and the emotional value of reclaiming running.
Vanilla Probiotic Boosts Activity
- A preprint on Veillonella atypica combined human and mice data showing reduced fatigue interference and more voluntary activity.
- The study suggests gut bacteria that metabolize lactate can alter activity and fatigue, hinting at a gut–brain link.
