This is quite a fascinating read about sleeping for athletes
In his ideal scenario, Littlehales says athletes wouldn’t be banned from having sex before big games (“absolute crap”) but most definitely sleep solo, with partners leaving for a separate room once it’s time to get 40 winks. Many top football clubs agree. At Real Madrid’s training centre only the player himself can gain access to his customised sleeping pod, so Ronaldo sleeps alone. Littlehales says people would be surprised by the spartan, purely functional bedroom facilities at Manchester City’s academy, where the emphasis is on player recovery rather than pampering. City players will sleep there before home games.
The ideal temperature to sleep is apparently 16-18 degrees celcius. Seems pretty cold for me, but really fascinating.