Thanks @BezMills . I'm sticking with hand weights for the moment, but some of the women in the Active for Life class have started using very light barbells for dead lifts and I was thinking of asking about that.
I have a horrible feeling that the next jump up in the gym is from 5 to 10 kg, but I'll have to check.
Fortunately, the studio for the Active for Life class has access to smaller hand weights and kettlebells, so I can get the use of those twice a week - Wednesdays and Fridays, so it's at least spaced out a bit.
I'm not sore at the moment, but I still have the shaky arm syndrome, if you know what I mean, so shall have to concentrate on consolidating at 5kg. I've previously used a 5kg medicine ball for sit-to-stand plus side bends and twists.
Felt quite pleased with myself when I realised that some much younger women in the gym were also using 5kg. A consultant advised me not to worry about losing weight but to concentrate on lifting weights, so that's what I'm doing.
Apart from anything else, the gym has got rid of its vibro plate, so I need to lift weights to help my bone density. (I know that the other advice is to jump up and down, but I'm not sure that my knees are up to it.)
ETA Forgot to say upthread that that was No. 7.