Paul Grilley's Yin yoga provides a functional approach to yoga asana.
Check out the Functional - Yin Yoga with Paul Grilley
Yoga alignment is not ancient
The Functional Approach and Yin Yoga- My Day with Paul Grilley - Pranamaya Yoga
Yoga Studies - with Paul and Suzee Grilley
Balancing Yin and Yang. Considerations for sequencing in life…, by Jennifer O'Sullivan
Yin Yoga Description + Benefits & Guide To The 7 Basic Yin Poses
What is Yin yoga?
To Yin or Not To Yin? That is the Question
Balancing Yin and Yang. Considerations for sequencing in life
What Is Yin Yoga? Ultimate Guide To Benefits & Practice