Losing weight with a bad back
Okay, this isn't particularly aikido related, but I thought that some of u may have had similar issues... I'm keen to lose weight (and my belly) and am obviously doing the usual (watching diet, being more active, etc.).
My problem is that I tore a muscle in my back about a year ago and it still gives me some trouble. When I started kung-fu as a "tubby" 14 year old I just did a stupid amount of sit-ups twice a day and lost most of my belly pretty quickly. If I even think about doing a sit-up now, my back complains.
So, are there any particular exercises that you'd recommend that won't put too much pressure on the back?