I couldn't find the right balance in this exercise, but that is why this exercise is performed so slow to give ability for students to find their centre and make their legs stronger. I am the one on the left. The biggest challenge in this - to not put your working leg down on the floor.
Our teacher was Olga Semenova, this is level 2, year 1993.
![](https://s2.save4k.ru/pic/EZsukEOb2Nw/mqdefault.jpg)