15 minutes, twice a day.

HEPOX is a cutting-edge patent-pending fitness product designed to help athletes increase strength and endurance by simulating high altitude conditions.

By incorporating periods of reduced oxygen into your daily routine, HEPOX supports your body's natural adaptation processes to improve performance. Studies show a 10-20% increase in strength and 3-5% in 1000meter times.

Elevate Your Performance

Elevate Your Performance

altitude training device for epo and red blood cell support

HEPOX

HEPOX

What is intermittent hypoxia exposure (HEPOX)?

Our
brand vision

HEPOX is now available. This early version lays the foundation for future models, which will feature biometric feedback and acclimation tracking integrated with a companion app. As a thank-you for supporting our development, purchasing any HEPOX now will grant you 50% off a future upgraded version.

Illustration of a sports altitude hypoxic simulator cylindrical device with dimensions, showing a length of 8 inches and a diameter of 3.5 inches, featuring buttons and a small display panel.
The benefits of altitude acclimitization shows an alpinist on the mountains

About the founder - david greif

HEPOX was born from personal pursuit. While studying mechanical engineering at the University of Arizona, I discovered road cycling and quickly became hooked—racing over 60 events a year and winning multiple collegiate conference titles. As I climbed the competitive ranks, I realized that determination could only take me so far. Like many athletes striving for the elite level, I began tracking calories, working with a coach, and committing to the gym. But without a family background in endurance sports—or a budget for expensive altitude tents—I had to get creative.

I’d read about altitude effects on red blood cell production, but a $6,000 setup wasn’t an option (especially not one that takes over your bed). So I set out to build a better solution. Inspired by how deep sea scuba divers use rebreather systems to recycle oxygen, I engineered a compact, accessible device that mimics high-altitude conditions and supports the body’s natural adaptation process. After testing the early version myself, I noticed a dramatic improvement in my performance—culminating in a professional racing offer after graduation.

Now that I’ve retired from competition, I’m bringing HEPOX to athletes everywhere—to make altitude training accessible, effective, and affordable.

Help us shape the future of altitude-inspired training — scan the QR code or click the link to take our quick athlete survey!

Contact Us

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