I hope you feel better soon @Zebracat, sciatica is so debilitating. Concentrate on getting better first, then you will have the energy to focus on weight loss.
I agree, @QueenOfHiraeth. I wondered if I was perimenopausal (I am 47 after all), but recent blood tests suggest not. My lovely mum laughed when I told her and said if I was anything like her I had a good few years to go - she was 55 when she started feeling menopause symptoms and 58 when she finally came out the other side.
I do think we naturally need less sleep as we get older - or maybe less sleep in single blocks - my mum sleeps for about 5-6 hours a night, but at 73, she does enjoy her daily hour or so snooze on the sofa. My dad is similar, 6 hours on a night and a daily nap in his favourite chair!
I'm averaging around 5-6 hours sleep myself and, in truth, it isn't affecting me much - yes, I sometimes feel tired, but who doesn't? Stressful job, home to run, two teenagers (1 at uni) and I also volunteer, so maybe I am feeling justifiably tired. I'm usually in bed by 10pm, so tried going to bed later for a few weeks, however it made things worse - I still woke at the same times! Honestly, it's like an internal alarm clock that I cannot find the off button to.
Maybe I am just in the wrong timezone and I'd be better off in southern Europe...