Hoof the ball
Full Member
Depends. Adding lean muscle mass doesn't necessarily slow you down. In-fact, if you train explosively with weights, you can gain lean muscle mass and get quicker. It's a false assumption that increase of lean muscle tissue = more cumbersome and slower. The greatest sprinters are incredibly muscular. It's that muscle development that drives acceleration and force. It's the fat that usually slows someone down.Muscle I suspect. I'm not an expert but I'd suspect too much muscle or too much fat have similar consequences.
My take on it is this. He bulked up and added a few lbs of muscle mass, whilst adding a few lbs of fat in the process. Most people retain the muscle mass gained and shed the excess few lbs of fat gained through intense cardio. Lukaku, however, seemingly has started the season with increased fat % and muscle tissue.