Increase In NHL Ankle Injuries Linked To Super-Slick Synthetic Astro-Ice NEW YORK—The NHL announced Tuesday it would study the possible safety and injury risks of playing hockey on Astro-Ice, an artificial rink-surfacing material used by many teams instead of expensive and difficult-to-maintain ice, the solid state of water formed at low temperatures.

Increase In NHL Ankle Injuries Linked To Super-Slick Synthetic Astro-Ice

NEW YORK—The NHL announced Tuesday it would study the possible safety and injury risks of playing hockey on Astro-Ice, an artificial rink-surfacing material used by many teams instead of expensive and difficult-to-maintain ice, the solid state of water formed at low temperatures.