I'm not a professional, but I think for me and my horses it is the best if I listen to "small" signals that they don't like a certain move. So i.e. if they tell me in a whisper that they had enough and I haven't finished the ET Basic Body Balance I do the rest in the aura. (since there is a rule that you always should finish it)
I compare it with a dog - if you ignore a growl you might get bitten... I don't want my horses to feel they have to bite or kick me so I will listen. And I think in the long term this builds up trust that I REALLY don't want to impose it on them.
Maria, that restraining idea you mentioned I find quite odd...
if it is for a very serious medical treatment, ok. But for releasing tension of any form it sounds quite contradicting to me. A therapist who would have the idea of strapping me to the massage bench would only see a cloud of dust and for my animals I am just as protective