I would say the majority of these guys lift weights to increase strength, size and endurance ... it is just the way of the world and the best way to get an edge. As I recall, Victor weighed even more when he fought and beat Dan "The Beast" Severn a year or so ago that I went to see. Victor has to cut weight to get into this range.
90 Kilograms is only 198 lbs and at 5'8.5" for myself, I weight 195 lbs. I don't consider this to be a large amount of weight at all. I also have to continually keep at my weight otherwise I lose it too easily.
"IF I COME ... I'M BRINGING THE PAIN WITH ME"