ESPN had an excellent piece in 2019 on how grueling the NBA travel schedule is for players, mainly in how it disrupts their sleep: "NBA exec: 'It's the dirty little secret that everybody knows about'", https://www.espn.com/nba/story/_/id/27767289/dirty-little-se...

HN discussion: https://news.ycombinator.com/item?id=21251094