I have covered and reviewed knee scooters (also called knee walkers) in detail on this website. The contraption helped me tremendously in the past after I ruptured my achilles tendon. And it was much easier to use in comparison to crutches.
A few weeks ago, NFL superstar Richard Sherman ruptured his right achilles tendon. Shortly after having surgery, he was seen on the playing field sidelines roaming around on a knee scooter:
An article from Forbes magazine analyzes Mr. Sherman’s injury, and mentions how many people who rupture their achilles tendons come back a step slower.