My waist, bust and hips are slightly larger now than they were, but apart from that I have kept my figure.
I attribute this to genetic predisposition, as my father was only a couple of inches larger round the waist when he died at 89 than when he was 17.
But I have walked and ridden a bike and danced all my adult life, which doubtless has played a part too.
I don't think trying to tone musclesl up now will restore a youthful figure, although it will probably do quite a bit of good.
Strangely, my one eyebrow and eye are now noticably (to me at least) lower than the other - looking at photos of myself in my thirties and forties the difference either did not exist or was not so apparent. There is nothing I can do about it, so I try not to let it bother me, but alas, vanity still seems to be a factor!