Train High, Train Down Low?

Is there a specific amount of time you want to be at altitude and is that important or do you follow the the old school thinking of sleep up high and train down low? Live high, train high we would do. There is no place to do bike riding up in Sierra Nevada unless you go on a turbo inside so that means riding down to approximately a thousand meters for phone groomer. The cuisine which is up in sean Nevada is to the likens of of people living in spain very much but it's just that they struggle with actually eating getting in enough food up there.