This is a symmetrical movement taught by Simon Borg-Olivier of Yoga Synergy. The moment has four parts: back lengthening (dorsal spinal lengthening) and front lengthening (frontal spinal lengthening), back shortening (spinal extension) and front shortening (spinal flexion). Notice the core is tracing a vertical figure 8.
![](https://i.ytimg.com/vi/6slT0TKqVLI/maxresdefault.jpg)