I have tried several different types of gloves, and prefer the 'ironwear" gloves (soft, weighted rubber resistance, with weight evenly distributed between palm and back of hand).
I got my first pair at Target years ago, and also picked some up at the Reebok factory outlet, and found some online.
"Ironwear" makes them for several other companies (Reebok, also used to make them for Janis Saffel), so if you look up "ironwear hand" or 'ironwear glove" on a net search, you may be able to find them.