Eli5: Is there a reason roller skates and roller blades don’t have spring shocks?

Question

I was thinking about this the other day…skateboards are flexible, bike tires are bouncy. Why aren’t there “performance” skates with shocks? Wouldn’t that be better for your knees?

In: 2620

Answer 1

Skateboards flex for shifting momentum. Bikes have inflated tires for rougher terrain. Shocks on skates would absorb your push off and require much more work to move.