About

About Raji Shah

I’m Raji Shah — the founder of Zone Five Labs, a sports tech review site for runners, endurance athletes, and anyone who wants wearable data to be more useful.

Zone Five Labs covers running watches, WHOOP, Garmin, Oura, Apple Watch, COROS, Polar, Suunto, Fitbit, Samsung, Wahoo, recovery tools, race-day setup, and the metrics that influence training decisions.

The founder image is an AI-generated placeholder for privacy and branding purposes. It is not a personal photograph.

What Zone Five Labs covers

Zone Five Labs focuses on the overlap between endurance sports and technology. That includes running watch comparisons, fitness wearable guides, recovery and sleep explainers, marathon gear checklists, heart-rate accuracy guidance, and practical recommendations for athletes who train consistently.

Why “Zone Five Labs”?

Zone 5 represents the highest-intensity end of endurance training. “Labs” reflects the site’s goal: measured, practical, test-minded reviews that help athletes understand products beyond marketing claims.

Editorial approach

Every guide is designed to answer who a product is for, who should skip it, what the tradeoffs are, and how to think about cost over time. The goal is to make product research clearer, especially for runners comparing wearable platforms and recovery metrics.

Independence and disclosure

Some pages may include referral or affiliate links. If you use them, Zone Five Labs may receive a benefit at no extra cost to you. Recommendations are written to prioritize usefulness, clarity, and realistic tradeoffs.