Hum. I tend to no longer train right before a match, I always leave them so they will get at least one tick of natural condition gain before the match so they will be between 90-98%.

What I have noticed (in match after training): if you give a guy green booster to make him same as every one else.. he still tires faster. My guys that have been power trained and then boostered usually perform flat or poor, even the best ones.