let him suffer with some humility then step in and help the DORK u know what he needs to do so give him a hand yea he was an ass about it and did everything ur not supposed to do but after u humiliate him a little maybe he will realize that he doesnt know shit and needs to start listening to the people around him thats been on this earth longer then him

IMO there is no turning back time to step in and help him out
but i would only help him with the cycle let him do his own thing in the gym and with diet just ride him everytime u see him doing something wrong like really make him feel stupid
give him the old BRO WTF ARE U DOING WHAT RU STUPID WHO DOES THAT