"Locomotive Breath" was recorded in an unusual manner for the time: the track was pieced together from overdubs, as most of the parts of the song were recorded separately. Ian Anderson did his normal flute and vocal parts in addition to bass drum, hi-hat, acoustic guitar and some electric guitar parts. John Evan's piano parts were then recorded; Clive Bunker added the rest of the drums and Martin Barre finished the electric guitar parts. All of these recordings were then overdubbed onto each other because Anderson was finding it difficult to communicate his musical ideas about the song to the other band members. The song was designed to replicate the chugging of a train in its rhythm.