I took Esther's course in 2013, and it's had a huge effect on my life. Getting into the correct position involves moving some muscles I didn't know I had, but,

I took Esther's course in 2013, and it's had a huge effect on my life. Getting into the correct position involves moving some muscles I didn't know I had, but, once achieved, it feels amazing. Sitting feels like being massaged. I can twist my neck further. When I practice karate, all my movements become faster and easier. The only problem is keeping the posture once achieved, as all your old movements can cause you to revert (and yes, it takes some core strength, but that's a small part).