Well if your dieting for weight gain its just gonna happen, you cant add lean mass without having some wet weight follow. Bulk up some then cut down later.

If youre doing abdominal resistance training your abs are gonna grow too which pushes your stomach out.

That cell tech hardcore will also cause some hold on water weight too... creatine does that. I would really say its a question of diet.

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I can do everything through Him who gives me strength.
-Philippians 4:13