The game only checks how much you can carry when buying and picking up items. You can put on Rings Of Strength and an Amulet Of Strength, pick up man items, then take off the strength items and put on Rings Of Constitution for more HP or other rings and amulets to boost other stats. This works well when duplicating Extra Healing Potions so you can carry a large number of them through tough areas and to face end Bosses.