Running at dawn to beat summer heat seems logical, but your body’s physiology tells a different story. A coach’s analysis of smartwatch data reveals how peak cortisol, heat stress, and sleep debt quietly accumulate into overtraining syndrome—and why the pattern matters more than any single metric.
You believe more effort equals better results. Your training log tells a different story. When your coach reveals that six weeks of relentless high-intensity work is actually sabotaging your performance, it’s time to understand the counterintuitive truth about athletic progress.
After a year of consistent evening running, blood work revealed unexpected markers: depleted iron stores, elevated inflammation, and disrupted cortisol patterns. The routine itself wasn’t the problem—but the timing might be. Here’s what the data showed and how to run smarter.
