Apparently, luckily for me, I tend to post the correct diagonals without knowing it. This came to be because all my lessons, until recently, were in western saddles where posting isn't exactly the go-to move. BUT most of the riding I do is on my friend's horse, who rides english. So, I've spend most of my time in an English saddle by myself without outside eyes to help me.
I had my first 'English' lesson yesterday and we worked on posting on diagonals and switching on figure eights. I honestly cannot tell which diagonal I'm posting on... I just start posting when it seems right. I've got no problems switching diagonals since it's just a pause in the rythem.
Does anyone have a good video that explains it? One that shows where the horse's legs are and where the rider is through a few strides? Apparently I somehow magically get it right most of the time, so I guess on some level I can tell, but I have zero confidence in it. (Evidenced by my asking 'is it right?' after EVERY transition) I know you can glance at the horse's shoulders to see which set are where, and I can certainly see his shoulders moving *grin* BUT I don't know where I shoud be in relation to where his legs are if I'm on the correct diagonal! At what point in the stride do I feel the 'up' move of the trot?