One requires much practice, patience, and discipline
Yoga from India
Asansas with Props
The ancient yogis used logs of wood, stones, and ropes to help them practice asanas effectively, Extending the principle. Yogacharya Iyengar invented props with allow asanas to be held easily and for a longer duration, without strain.

Yogacharya Iyengar in Setubandha Sarvangasana. This version of the posture requires considerable strength in the neck, shoulders, and back, requiring years of practice to achieve. It should not be attempted without supervision.
And
Then
There's
Irish Yoga
