He was actually at 250+ at some point (see picture attached of when he was at his worst).
reports say that he was introduced to dietetics this year and that he understood the importance of being in shape if he wants to play at the highest level (in the past, he used to say in interviews that his weight was not a problem and that he would not see why he would have to lose some until someone tells him to; he was also mentioning drinking beers and eating junk food...)
Edit: just something, he was listed about 245 (i.e. 113 kgs) at the beginning of the season by the Spartak website).
http://www.spartak.ru/sezon23/comanda/medvedev.htm