calves.
yes: calf raises, squats and deadlifts.
i personally like seated calf raises, but I have genetically large and strong calves. I can do warm up sets on standing calf raise with the entire stack (485lbs at my gym) and it takes 20 reps to 'feel the burn'.
meanwhile the pads dig into my shoulders and leave me with striped surface bruises which I don't care for.