Trembling legs

[jose]

Hello, I about two years ago began to assiduously practice yoga first with a soon single professor. Throughout this time I have learned much on my body and the importance of the conscious breathing. So I animate all to people to practice yoga as therapeutic methode and of happiness. Good, the question; When I practice sirsasana or sarvangasana, where the legs are raised for some time, after finding the position relaxed the legs begin to shake. Normally I concentrate much tension in the legs during the day. Trembling goes growing if I allow it; it is as if I decided to shake or not to shake; why it can pass that? Thanks

[Mukunda]

i refer you to another recent subject - trembling. This is either a sign of nervous system being discharged of tension from tight muscles holding the nerves within their body or Shakti awakenign of prana. The trembling is a sign of good practice in either way. One needs to be free of the accumulated stresses of life no matter when or how they accumulated.
Inverted positions as a general category of poses are known as Viparita Karani Kriya or Mudra. Technically this translates to "Purification due inverted actions". AS the Kriya level occurs there is purification on any o fthe dimensions of self -- physiucal, emotional, mental, pranic. Once this level has completed its purification then it becomes a Mudra. Nudra is experienced as a profoudn stillness a deep inward turning that is beyond the level of asana. Asana is #3 of Patanjali's 8 limbed Asthanga system; this Mudra is level 5 or pratyahara. It occurs when asana and pranayama have spontaneously arisen as body stillness then breath stillness.
I encourage you to continue to allow trembling to occur and gently move toward the deeper levels of Classical Yoga as described in Yoga Sutras. blessings. mukunda