Hey Ecdyonurus!
That's what i have heard too,people getting dizzy and nervous after doing SRF version of Kriya pranayam.
Yeah,for some having guidance is a good thing when starting with Kriya.But in Kriya,especially in advanced phases,there is no such thing as "exaggerated pranayama"It is known for a fact that students of Lahiri Baba were encouraged to do very large amounts of pranayam such as 1728 in one sitting,which is about 10-12 hours of pranayam.Usual advice in my Kriya family is to add more sets of pranayam once when Kechari is obtained.From mine modest experience,Kriya pranayam is very stable and safe thing to practice.
Hey Makak!
What i sad about alternate nostril breathing are words of person who was student of Satyacharan Mahasay(Grandson of Lahiri Baba)with more than 50 years of Kriya under his belt.I trust him on that.
To be frank,i know very little about other sadhanas,and as far as i know Kriya pranayam vas revived by Lahiri Baba.
Kriya pranayam,with aid of other Kriyas has the power to gradually still the Prana.Prana in manifested form is dynamic and essence of whole Creation is dynamic Prana.Beyond Creation is the Static Void,Static Prana-Brahma which is Origin of everything,Absolute,Master,Bearer(Dharma),Creator,Mother,Father,Truth and so on.God,as we say in West.That is our original state.Imperative of every human should be to revert from dynamism to that Stillness,where once one is settled,birth-death cycle ends,ie. Moksha is attained.
It can be done only thru stilling the Prana to the point where it becomes static,then merging ie. state of Yoga is possible.
That happens with Kriya,on the path of six chakras in the spine.Prana has gained it's dynamism by ascending from Sahasrara ie. Static Void,Static Prana-Brahma to the Muladhara,gaining it's dynamism more and more in each of the chakras,starting with Vishuddha ending at Muladhara.To revert to Stillnes,only path possible is in reverse,starting with Muladhara and going to Kutastha ie. Ajna.Which in turn happens by austere practice of Kriya.
That is why Kriya and it's pranayam are so "good for beginning." :-)
Hi Blue!
There are differences in Kriya pranayam and AYP's version.
Here is quote from Garland of letters on those differences;
"No. 79:
Sri Guru's [Lahiri Mahasay’s] letter:
Many do not practice mantra japa chakra by chakra. When this does not happen, it results in "tamasic" Kriya [Kriya with negative qualities], and the fruit of this is also "tamasic". Therefore, during pranayam, one must keep attention on the six chakras in the spine and practice japa in each of them."