Walter Payton was the first to train in SS back in 72'-73'. He would sprint in them all the time. Helps you stay on your ball of foot & hits the claves REALLY hard.
My calves have gotten stronger & shredded from SS's Here's how I use them:
Various jumping drills-(Plyometrics)
Play bball in them.
NO more sprained ankles either!
Eric Dickerson swore by them as well I recall.
Also! I have never hurt myself in anyway from using them! U guys must not stretch or use them in the correct manner.
I known the very well known St. Anthonys bball team up in Jersey plays in them during practise!! And they're always in the top for high school ball!