You should respect the schedules and privacy of neighbors.
It's midnight and Rachel's neighbors are sleeping, but she can't seem to herself, so she wants to exercise.
Rachel wants to play music.
Rachel turns on her workout playlist  and listens in her headphones.
Rachel turns on her workout playlist  through the speakers on her home theater.
Rachel's neighbors are able to sleep, and she is able to tire herself out.
Rachel's neighbors wake up and pound on her door for her to knock off the racket.