The bodies were [and will be] completely spiritual

In truth, before [Adam and Chava] transgressed the command of the Holy One, their bodies were also completely spiritual, like our physical bodies shall be after complete refinement...when comprehension of G-dliness will give life to the body like physical eating and drinking does [at present]. This is what Adam's body was before the sin...that his heel was brighter than the sun.

Ohr Hatorah, Bereishis vol. VII (page 2326 (1163a))