Typical normal-service engine valve-train components may be too lightweight for operating at high revolutions per minute (RPM), leading to valve float.  This occurs when the action of the valve no longer completely opens or closes, such as when the valve spring force is insufficient to close the valve (it does not fully rest on its seat even though the cam would allow the valve to close) causing a loss of control of the valvetrain, as well as a drop in power output.  Valve float will damage the valvetrain over time, and could cause the valve to be damaged as it is still partially open while the piston comes to the top of its stroke.  Upgrading to high pressure valve springs could allow higher valvetrain speeds, but this would also overload the valvetrain components and cause excessive and costly wear. 
It’s no secret there exist a strong anti-steroidal population and as this “anti” feeling is often so emotionally based it can produce some laughable claims. If you’ve been around the performance enhancing game for any length of time you’re familiar with all the names and acronyms so this will probably make you laugh. Yes, there are a few street names for steroids such as juice or roids but those are some very generic terms and really don’t point to anything specific. We went to a handful of the anti-steroid websites so desperate to paint anabolic hormones in a bad light and they have made up their own street names for steroids that are quite humorous and they include “Pumpers, Gym Candy, Arnolds, Stackers, Balls and Bulls, A’s, Weight Trainers.” “Weight Trainers” are you serious, Arnolds? If that didn’t make you laugh a little then you don’t have a sense of humor but the sad truth is these websites are real and many of them are funded by your government.