Your body is always talking.
YCR combines SapereX science with personal interpretation and practical coaching from Jay Radford—an endurance athlete, longtime operator, and guide who helps people turn complicated data into a clear next step.
From questions to a clear next step.
Complete the SapereX Cortisol Athlete assessment.
See how rest and training days compare.
Work with Jay to translate the report into practical action.
Most athletes already have data. They still do not know what it means.
YCR closes that gap through three parts working together—not any one piece alone.
Jay's Story
A lived health journey with cortisol and recovery—the questions and mistakes that come from actually going through it, not just studying it.
SapereX Science
The clinical engine behind the assessment: a structured, lab-backed methodology comparing your rest day to your training day.
Jay's Interpretation
Turning the report into a clear read on what it means for you, and a practical next step for training and recovery.
Do not just measure cortisol. Understand your rhythm in context.
SapereX Cortisol Athlete compares your pattern across a rest day and a training day. The value is not another isolated number. It is the personalized report that helps explain how your body responds to demand and moves toward recovery.
Multiple samples across two different days show movement, not a single snapshot.
The report is built around your own rhythm, training response, and recovery pattern.
You receive meaning and context—not just raw laboratory values.
I know what it feels like to believe pushing harder is always the answer.
For most of my life, I solved problems by working harder. In business, in running, and in life, I learned how to keep going. What I did not always know was when effort was helping—and when my body was asking for something different.
I have run more than 20 half marathons and 10 full marathons. I have also spent more than two decades building and operating businesses, leading teams, and making decisions from imperfect information. Across all of it, the work has been remarkably similar: find the pattern, understand what it means, and decide what to do next.
That is the role I play at Your Cortisol Rhythm. SapereX provides the science and the personalized report. I help athletes make sense of the findings in the context of their training, recovery, wearables, goals, and real life.
“I have spent much of my life finding a way out of difficult situations. Today, I help other people find their clearest way forward.”
SapereX. The lab-backed engine powering every rhythm.
SapereX built the Cortisol Athlete assessment: the collection protocol, the lab analysis, and the methodology that compares your rest day to your training day. Jay is not the lab—he is the person who helps you use what the lab finds.
A structured, repeatable protocol—not a single spot check.
Rest day and training day are measured and compared directly.
Designed around training and recovery questions, not general wellness screening.
You don't just get a report. You get someone to walk you through it.
Every SapereX Cortisol Athlete purchase includes a free one-on-one interpretation session with Jay—a $99 value, on us.
Report Interpretation Session
Once your results are in, Jay walks you through them personally.
- Understand what the findings actually mean
- Connect the pattern to your training and recovery
- Leave with clear, specific next steps—not just a PDF
Ongoing Support
Some athletes want a guide beside them past the first session. If that's you, Jay can talk through what continued support looks like—no pressure, no pitch.
High Cortisol Is Probably Not Your Problem
Why 98% of measured cortisol profiles show a dampened morning rise, not elevated cortisol — and the personal story that led to Your Cortisol Rhythm.
Read the complete entry →Recovery Doesn't Start When Your Workout Ends
The workout can stop before your biology has shifted into recovery. Learn why that transition matters.
Read the entry →Ready to understand your own rhythm?
Start with the SapereX assessment. It includes a free $99-value interpretation session with Jay, so you're never left reading a report alone.