Signal blog
Training intel.
2026-05-01
Why Your Easy Runs Are Probably Too Hard
Most recreational runners spend nearly all their time in the wrong zone — too hard to recover from, too easy to adapt to. Here's what the data actually says.
2026-04-22
The Recovery Metric Elite Runners Check Every Morning
Heart rate variability isn't a fitness metric — it's a readiness metric. Here's what it's actually measuring, why it matters, and how to use it to train smarter.
2026-04-10
Are You Actually Ready for Race Day? Here's How to Tell
Race fitness isn't a gut feeling. There are real signals — in your training data, your recovery metrics, and your recent workouts — that tell you whether you're on track.