Ta for this. I had suspected that exercise and eating right was the issue, rather than the physical presence of podge, but my doctor explained that artificially fattened guinea pigs developed diabetes. I want to track down that research.

A difficulty for me personally is that my diet is already very good - it's been low fat, low GI for years. I can always tighten it up a little, as I did recently when my insulin resistance increased and my blood glucose readings started to climb - but there's not a whole lot I can improve in that department, and in any case it now has little effect. What I need is a lot more exercise, and not just for the sake of weight loss or blood glucose.