Fitbit Air vs Garmin Fenix 8 vs Whoop 5.0: six weeks tested
Fitbit Air — Six weeks wearing all three. Which one's sleep, HR and recovery data[…]
What your heart rate data actually tells you
Heart rate data — Two athletes at 150 bpm can be in completely different physiological[…]
Unlock Your Speed: The Secret to Running Faster, Not Harder
Running faster — Speed comes from mechanics and economy long before it comes from working
Everyday food choices and timing beat any supplement
Food choices & timing — What you eat on ordinary days matters more than anything[…]
The power and the limits of Zone 2 training
Zone 2 — What Zone 2 genuinely builds, what it can't, and how much of[…]
A DIY approach to sports supplements
DIY supplements — Mixing your own carb drinks: the ratios, the costs, and what's worth[…]
You are not an algorithm
You are not an algorithm — Development isn't linear, and treating it like a formula[…]
Lactate: from misconception to modern application
Lactate — Not a waste product, not the cause of soreness. What lactate testing actually
VO2max as a Major Endurance Metric
VO2max — The ceiling metric everyone quotes — and why it alone won't predict your
Bike Fit closed for vacation
For the next weeks the bike fitting at cyclekom is closed. I am back on[…]