There's been data since at least 2017 showing that getting up before sunrise is a bad idea: https://aacrjournals.org/cebp/article/26/8/1306/283057/Longitude-Pos

There's been data since at least 2017 showing that getting up before sunrise is a bad idea: https://aacrjournals.org/cebp/article/26/8/1306/283057/Longitude-Position-in-a-Time-Zone-and-Cancer-Risk https://aacrjournals.org/cebp/article/26/8/1306/283057/Longi...