Why Okinawans Ate 70% Sweet Potatoes
FITNESS

Why Okinawans Ate 70% Sweet Potatoes — And Why Xendurance Uses Them in Fuel-5

The same traits that fueled Okinawan longevity translate beautifully to modern training. Exercise generates oxidative stress and depletes glycogen. Sweet potatoes counter this with complex carbs fo...

FITNESSCompromised Running: Hyrox’s Biggest Game-Changer

Compromised Running: Hyrox’s Biggest Game-Changer

But here’s the truth most beginners discover too late: the real separator between a solid finish and a personal best isn’t raw strength or pure running speed. It’s compromised running—the ability t...

FITNESSWant to Live to 100? Can Storing Your Own Blood Help?

Want to Live to 100? Can Storing Your Own Blood Help?

Yes, your blood. Stored now, potentially used later to combat the cellular wear-and-tear of aging. It sounds like sci-fi, but the biology is real, the research is accelerating, and the first step s...

FITNESSAging Can't Be Stopped, But Could a Daily Pill Slow It Down?

Aging Can't Be Stopped, But Could a Daily Pill Slow It Down?

The headline finding is clear and statistically significant: daily multivitamin supplementation modestly slowed the rate of biological aging.

FITNESSWhy Bioavailability in Your Supplements Is So Important: The Xendurance Difference

Why Bioavailability in Your Supplements Is So Important: The Xendurance Difference

Bioavailability refers to the proportion of an ingested substance that survives digestion, crosses the intestinal barrier, avoids immediate liver metabolism (first-pass effect), and reaches target ...