Matsyasana
fish pose

Freestanding, the extension can be used for Matsyasana type poses (see picture) for which it is much better suited than the commonly used block.

Ardha Matsyendrasana (Half Lord of the Fishes Pose) also known as "the seated twist"

Ardha Matsyendrasana (Half Lord of the Fishes Pose) Named after a legendary teacher of yoga, this twist energizes the spine and stimulates the digestive fire.