Slower choir practice tracks: how do you handle breath marks?

When singers use a slowed version of a choral rehearsal recording to learn notes, how do you handle breath marks in long phrases? Keeping the same marks can mean sustaining a phrase much longer than at performance tempo, while adding breaths may make it harder to return to the intended phrasing. Would you split the phrase for slow note-learning, mark temporary breaths, or alternate slow and full-tempo recordings from the beginning? What instructions have you found most useful for keeping home practice consistent with the choir’s final phrasing?