Maybe someday the only "true" professional sport will be hockey! It's nearly impossible to juice a hockey stick or a puck and it's played by medium-sized white guys who are wearing too much clothing to show off multiple tattoos or gaudy jewelry.
The only pure sport is track and field.
The clock or tape tells the tale.
You can as long as the other team doesn't find out and orders a "stick check," to make sure the stick isn't curved too much. That was a huge factor in the Stanley Cup Finals back in 93 between the Kings and Canadiens.
You can juice a hockey, in fact within the rules it's already done. Check out a super slow-mo of a slapshot, notice how the stick bends because the player actually hits the ice with the stick behind the puck, then the straightening of the stick adds force and speed to the slapshot. Players seek after sticks that can bend further and snap back to straight faster while breaking less. So far for the most part those are mutually exclusive goals (harder snap backs usually result in increased fragility), but eventually somebody is going to find the super material.