If there was a way to ensure no commercial breaks && you could turn off the announcers/commentary leaving just nat sounds, NASCAR races will put me right out.
I love MotoGP but I also fall asleep sometimes during races hah
Specifically, the Masters is the most elite napping weekend of the year.
Until the ad break and some idiot starts shouting about insurance. Snooker on BBC TV or cricket on the radio, nothing beats it.