Yes, get a more comfortable chair that provides decent back support. Alternatively, perhaps you could start a new trend and develop a number of very quiet exercises that can be done while listening to music. Something to keep the muscles moving and stretch the spine. Side arm lifts (high over your head). Side to side neck rolls. Gentle back twists. Heck, pushups are quiet but your ears are no longer in the sweet spot. Stomach tensing might work. Hmmm. There might be a new industry here. Audiophile grade workout mats, dumb bells .... the list could go on.
Whether you go that route or not, the trick is to stretch a bit between cds. Good luck.
Whether you go that route or not, the trick is to stretch a bit between cds. Good luck.