Postby Chisamba » Wed Aug 02, 2017 11:21 pm
actually, i believe it is using your psoas. People say back because they do not know what a psoas is. The Psoas runs from your lumbar spine through the front of your pelvis to your upper inner thigh. it is THE link between the lumbar and the thigh. well i am not an anatomy expert, but once i found out about the psoas i was much more able to tell people how i used my back, my thigh and my seat. i will let a person sit on their polite horse in front of me, and put the lunge line around their lower back, and hold each end in front of the horse while i am standing on the ground near their head. i will take the ends and just taunt the longe line. then i will tug and tell the rider to not let me pull them out of the saddle. This has been, for me, the best way to teach people how to feel and find their psoas on horseback. of course one needs a horse that is going to just stand and allow this to be done.
some people who use Dresseurs technique, ( pushing a book, pushing a door, pushing anything) can achieve this while arching their back, which will allow the pelvis to tip down, even as the horse is trying to tip up ( collect). again, this works for many people, but does not work for some. I find people that tend to have a bit of a rounded back in particular find it advantageous to find their psoas while mounted since their body needs to be in a slightly different position to be engaged.
I think being lucky in having ridden so much at a young age, on all kinds of horses in all types of tack, with and without, i found my psoas without knowing when or how. I had to actually study it to be able to teach.
the psoas also stabilize one from right to left and left to right. no one yet has mentioned the huge habit riders have of sitting offset. ie, allowing their ribs to crunch slightly on one side, or having one shoulder ahead of the other, which very often also allows them to have one legs slightly offset from the other. If you sit opposite one rail at a show, it is amazing how many riders are like this. when i did my teacher training courses with Anders Lindgren, he made sure we understood not to always stand in the middle to teach, that it was essential to have a chair in one corner so you could see the horse come directly toward on on the short side and directly away from you on the long side. a person who looks perfectly correct from the side may often have a tendency to not be centered from behind. i make sure when Mikhail videos me that he also takes a direct view from behind.
my suggestion, make good friends with your psoas
i do not know for sure if this is true, but i was told once that lordosis is caused by a shortened psoas