The AI coaching market is growing fast. Most of what's out there doesn't deserve the name - COACH. Here's a framework for understanding what exists, what works, and what's coming next.

Your watch measures your HRV every night. Here's how to actually use it to make better training decisions, avoid injury, and arrive at race day ready.

Most running injuries aren't caused by bad biomechanics. They're caused by doing too much, too soon, without enough recovery or consideration for life outside of training. Here's how to get the balance right.

A static plan tells you what to do. An adaptive coach tells you what to do today, given everything that's happened since yesterday. Here's how that actually works.

Your watch collects more physiological data than a sports science lab from 2005. The question is whether anything is actually using it.

Human coaching is expensive, inconsistent, and doesn't scale. The athletes who need it most have never been able to get it, until now.

Bill Bowerman coached by watching, not scheduling. Sixty years later, most runners are still following plans that have never met them.

Most "AI coaching" is a chatbot bolted onto a PDF. Here's what it actually takes to build something that deserves the name.