So I'm switching to dumbbell curls, since the ez bar I have is hurting my wrists. I was wondering if I should do preacher curls, or standing curls. My thoughts were on standing curls when you have the dumbbells at the side and turn the dumbbell as you bring the weight up, you're only putting half the amount of work on that part of the bicep, since you need to turn the dumbbell. Is this current? So I was thinking maybe preacher curls are a better alternative, or standing holding the dumbbells in front and then curling, but this I need to use about 5 lbs less than I do on the preacher curl it seems. So what are your thoughts?