I have recently started long reining my horse again (we had started doing it for the first time before the winter) and she is absolutely fine in walk but gets tense when I ask for trot. I think she has accepted me following along behind her in walk but isn't so sure about the idea in trot, so instead of stretching out and forward her head goes up like a giraffe and she's fixed on what I am doing. I make sure I am always to the side of her (never behind her) and I don't look at her but rather in the direction of where I want us to go. I've been using a dually halter (until I can be certain I'm 100% with the long reins) so I am wondering if having the bit in and giving her a contact to work into might help? I am planning on having some lessons soon (since madam is far too intelligent to simply being pottering around doing figures of eights and circles

) but was wondering if anyone had any input/suggestions?