weirdly, i find my legs recover better on higher frequency. Yes, its an extreme style but I thought I would give it a go. I enjoy it and so far its not interfering with my 5 rep squats
My lower back copes fine on powerlifter squats normally, its just the 20 rep breathing squats take about 3 minutes and my lower back can't cope with that.
But i think i should do more lower back work as its letting my DL's down. It just never seems to grow (I do weighted back extensions although not GM)