I'm a former bodybuilder and powerlifter (3rd in state competition some 20+ years ago). Now a days people call it biphasic sleep. Back then we called it napping or siesta (1-1.5 hrs) after the afternoon workout.
Of course it was much easier for me back in the day to take afternoon naps because I was in college and had a more flexible schedule. I no longer bodybuild or powerlift, so I don't know what the latest research has to say.
Good luck!