Hi, Plateau loading refers to keeping the same weight for each set at a pre determined set and rep pattern. e.g. 5×5 @ 100kg. Step Loading involves increasing the weight with each set. So if we use 5×5 again you might increase by 5kg each set e.g. 85kg/5, 90kg/5, 95kg/5, 100kg/5, 105kg/5. Cheers Damian