I spent Wednesday evening in Coventry with the Belles of Three Spires, working both with the chorus and with their directors. Well, that's always the case of course, but our focus was sometimes on changing what the singers did to improve the performance, and sometimes on the person out front.
Read almost any book on conducting, and you will find some comment about how the director's communication and expressiveness comes not only from their conducting gestures, but from their whole demeanour: their face, their stance, their way of being in the world. (That includes my book, I should add.)
Now, both Belles director Lucy and her assistant Lindsey are expressive musicians who clearly have a full-body experience of music. So I didn't need to tell them this. Actually, what we found ourselves doing was concentrating the musical attention more closely into the gestures.