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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 ...
Allow Myself to Introduce Myself
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...
Developing an effective return to running program
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When developing a return to play program at any level, it's imperative to take into account the sport's total running volume as well as time spent at various intensities.
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My Process
Here's how I go about this process to ensure successful return to performance for an injured athlete.
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The 3 primary variables I look at are:
1. Total volume (for tissue tolerance and reconditioning)
2. Hi...
The High Performance Pulse
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