I had a long term girlfriend back in the late 90s that worked shifts like that. Her sleep was messed up and I never thought it was healthy for her. I knew other folks that worked at the same place and they always looked worn out. She worked in a control room so not heavy work. She was in her 30s then so pretty young. I guess it depends on the person. She always said the financial benefits of working there outweighed the swing shift issues for her. I never encouraged her to change jobs as she seemed ok with it.
