Backbends are a sure thing for unleashing prana
This pose feels so good with the strap. The Ashtanga way is to hold the toes, no strap (and for me, this means that all of my energy goes toward not dropping the foot, or even getting it). My favorite Iyengar teacher instructs this one with a strap.
It is a wonderful shoulder opener (euphoric) and doing it this way I'm feeling the Prana in my shoulders, entire back, up and down legs. I'm even smiling. Using resistance against the strap (foot and shoulders higher up) feels even better. I forget I'm even balancing. My favorite backbend...
Backbends are a sure thing for unleashing all kinds of emotional holding. For me, it's a guarantee and always leaves me happier. Some people experience fear and sadness in backbends (and I'm also one of them) as these feelings hide inside a broken heart or cold heart that doesn't feel much...but can't help but rise to the surface in backbends. Getting the energy to express itself is a wonderful way to release it.
Namaste.