jazzercise, just before disco came in, when jane jazzercise, just before disco came in, whenjane fonda in the early 80s came up with all the disco moves and the fitness then, itjust the fitness then, it just falls through the whole history of fitness classes. d0 through the whole history of fitness classes. j, , ., through the whole history of fitness classes. , ., ~ ., ., through the whole history of fitness classes. ~ ., ., .,~ classes. do you know what i ve taken awa from classes. do you know what i ve taken away from this? classes. do you know what i ve taken away from this? i classes. do you know what i ve taken away from this? i now classes. do you know what i ve taken away from this? i now have - classes. do you know what i ve taken away from this? i now have an - away from this? i now have an earworm, olivia newtonjohn s let s get physical. a great song. it will go over the heads of loads of people. i was trying to look up what year it came out, i can t find it, it is