In the post fight interview first Costa said his bicep was injured and couldn't train and that's why he was heavy then a couple minutes later he said he "doesn't enjoy the life...just salad all day" and then "don't eat everything you want". So was he injured or just lazy with the diet? I'm guessing 20% was due to injury (if he even had one, his punching looked fine) and 80% lazy diet. The harsh reality is what you eat means a lot more than exercise and training when it comes to weight. Time for him to move up in weight if he "doesn't enjoy the life" of watching his diet.