W's sleep has gone downhill since about 3 months as well. He was sleeping through sometimes or only waking up once. Last night he woke up about 5 times and decided that 5am was play time. I don't know what to do so I just put him in bed with me and feed him when he wakes.

We have a night time routine of bath play feed bed, but it doesn't really seem to make a difference.

I am not sure that moving her arms and legs would tire her out, W 'walks' around the house all day with me holding his hands and he is certainly not sleeping any better.

Good luck