Has anyone tested to see if testosterone replacement can improve sleep? It increases lean muscle mass, which would in theory be correlated with lower body fat which is heavily correlated with osa. It seems a lot if science has been devoted to one direction — sleep problems causing say metabolic syndrome, but oddly not much science looking at the other direction — low testosterone causing increased body fat leading to poor sleep. It’s always assumed body fat is “lifestyle” choices. Doctors like to blame fat people for their medical issues it seems to me.