> This is outside the optimal sleeping temperature FYI as a normal human being going to work. This really surprised me actually, but some say it should be as low as 18C.

I'm definitely with you on that these athletes should do whatever they think is best for them for the few days that they're in the olympic village, but generally cooling down the entire world's bedrooms to 18C would be pretty catastrophic, at least using today's technology. One day, hopefully!