Is Savasana necessary? Does it do anything? Can't I just leave after those last few poses. Sneak out and try not to disturb anyone...
Nope. Stay for Savasana.
Savasana is important. The last pose really is all about saving the best for last. Give your body those few minutes (5-15) usually, to reap all the benefits of your yoga practice. To calm the mind and the body and to transition back to your crazy life.
Here's a little article on Savasana by someone probably way more intelligent than I am. Or at the very least more published. :)
Give it a look. Please don't skip it, even in a home practice. Don't skip it. And it can be spelled both Savasana or Shavasana.
I prefer Savasana as the spelling.
Debbie Krejci E-RYT
Yoga Teacher Training Mexico, Costa Rica, Sri Lanka
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