Hiya
Gene, firstly get a marseilles type belt. Thats simply a rubber type stretchy belt with a simple quick release buckle. Makes a HUGE difference!!
Many spearo's who have back problems also use weight vest/harnesses. A couple of manufacturers make them, like the Omer Gilet. This is a waistcoat type of vest that holds some weights in pockets.
Spearfishing and Freediving Equipment - Weight Belts - Weight Harness - Technosport Inc.
I think in Terry Maas's book, Blue Water Hunting, he describes a way to make a harness fairly easily. I recall some-one posting it on some forum, but simply can't find it right now. Will search some more.......
Some spearo's who hunt shallow water, also have the problem of their fins drifting up. They use ankle weights to weigh down their legs. I haven't used them, so can't really comment on how much extra strain they would put on your legs if you intend swimming long distances.
I wear a 10kg (+-22lb) weightbelt and have not had any hassles with it. Try using your weightbelt and see how it goes. Also, try putting the belt on your hips, and not around your mid-section. This also helps for guys with back problems. Should you go for the weight harness, or similar product, still wear a weightbelt with some weights on it, so that you can drop it quickly should
the need arise. Regardless of which method you use, please ensure that you can make yourself bouyant, should you black out or are in dire trouble.
Regards
miles