How to Build a Better Knee

Whoever described the human body as a marvel of engineering was clearly not talking about the knee. Design-wise, it's deeply flawed: To function properly, more than a dozen tendons, ligaments, and bones must work in concert. Despite this complexity, the knee rotates in only two directions, forward and backward — great for when our forebears sprinted across African savannas, but not …

This article originally appeared on How to Build a Better Knee

Source: Mens Journal