Webinar this Thursday!

  Many teams are using MAS to train “aerobic capacity”… but they’re not actually improving game-speed repeatability. Why? Because Maximal Aerobic Speed (MAS) has been turned into a math problem instead of a programming tool. So I’m running a live webinar on Monday, March 2, 2026 at 7:30pm CST to fix that. 🎯 “Simplifying MAS for Team Sports” In it, you'll learn: What MAS actually is (and what ...

Hey — thanks for being here. Whether you joined this list last week or you’ve been around since the Conditioning Project days, there’s a decent chance you know my content better than you know me. So to kick off 2026, I wanted to properly re-introduce myself and reset the tone for what this newsletter is about. I’m Tim Kettenring — and I build principle-based performance systems, not just progra...

The beginning of the year is the perfect time to assess your approach to conditioning - for your athletes AND yourself. For your athletes: you can get the Coaches’ Conditioning Course for $99 (normally $149). This course breaks down: How to assess energy systems without overcomplicating it Why aerobic capacity is the foundation for speed, power, and recovery How to stop guessing and start...