Dave Meltzer gets the story:
He's up from his usual 187-188 pounds as his walk-around weight to 195-196, and said he's slowly developing muscle that he will maintain. At the same time, he emphasized that his athletic performance comes second to his health, and despite competing in a dangerous sport, he is not going to take any steps that would hinder his long-term well-being.
The 28-year old St. Pierre said that if he gets up to 200 pounds, he may have to move up a weight class. He's noted that he goes against middleweights, light heavyweights and heavyweights in training all the time, and does very well against them.
The key is whether St. Pierre can continue to make 170 without a problem. He said if and when the cut becomes too drastic, that's when he'll stop. It's in that next class up where Anderson Silva, his much talked-about potential future opponent in what would be one of the biggest matches in company history, resides as champion.
"I'm not afraid of any man in the sport," said St. Pierre in reference to Silva, who along with St. Pierre and Fedor Emelianenko are the three fighters most debated for the No. 1 pound-for-pound spot.
A GSP vs Anderson Silva match would be the kind of epic match that the UFC is increasingly desperate for. Dan Hardy could certainly shock the world by upsetting GSP (see Serra, Matt), anything can happen in MMA. But going into that title fight it will be a very hard sell to convince fans that they are seeing GSP truly challenged.