Guides

Practical running advice from Jeremy, the coach behind Carl. No formulas, no fluff: the stuff that keeps you running.

Training by feel vs. heart rate zones

What your watch can't see, and the three habits that replace it.

Running with a niggle

When to adapt, when to push, and the three questions that sort it out.

Coach Carl vs. a human running coach

An honest comparison from a coach who is both.

Coach Carl vs. a static training plan

What changes when the plan talks back.

Written by Jeremy, the coach behind Carl: 12,000+ miles, 12 ultramarathons, zero injuries since switching to training by feel. Start where most members do: the free two minute quiz. Is your watch controlling you?