'Mythic Quest' star Rob McElhenney bench presses 345 pounds and breaks down the diet and workout combos he used to transform from Mac, to Fat Mac, to Jacked Mac in It's Always Sunny in Philadelphia. (Spoiler: it involved a lot of ice cream.) Watch more Men's Health 'Train Like a Celebrity' videos HERE: ROB MCELHENNEY 'LOOK LIKE A FIRE HYDRANT' WORKOUT • Bench Press (max weight 345 lbs!) • Incline Dumbbell Press (3 sets of 8-10 reps) • Machine Cable Fly (4 sets of 10 reps) SUBSCRIBE to Men's Health: MEN'S HEALTH SHOWS: Gym & Fridge: Train Like a Celebrity: Eat Like a Celebrity:
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