For years I practiced an hour-and-a-half ballet barre workout at home twice a week, with sets I remembered from 15+ years of ballet classes, set to my own choice of music by Loreena McKennitt, selections from "The Mask and the Mirror" and "The Book of Secrets." The songs I chose had just the right tempo and rhythm for variations of stretches, plies, releves, grande battementes, etc. More than that, this mysterious, sensual music made "exercise" seem more like a body/spiritual experience. I would feel lost in the music, striving for my own variation of grace......sometimes it felt like a kind of sacrament, trance or rapture.
Three years, twice a week, and I never tired of this music. The music was, in fact, what kept me going. I might feel weary, but if I just put on the first song, I would suddenly find the energy to begin. Just a few days ago I listened to one of the songs again and even now felt like a trick pony, ready to start again.
So yes......I certainly do believe music can add enjoyment and more to a workout, even make it feel like it's NOT a workout, but something elevated and divine.
That's about the best a person can hope for, I think.