ida pingala sushmana AND vasthu

 ida -female - is left side of vasthu purusha - and cool - moon - air is cool - water is cool

pingala - male - right of vasthu Purusha - hot  - sun - fire - 

https://www.prana-sutra.com/post/ida-pingala-sushumna-nadis-yoga

autonomic nervous system – the sympathetic and parasympathetic state

Chandra Bhedana Pranayama will enhance Qualities of ida nadi - relaxes one to calm down emotions, rest well, activates kundalini - 

to practice - sit in crossed Legs - with right hand in Vishnu Mudra  (Nasika Mudra (closing index and middle finger)) or in Nasaagra Mudra (touching index and middle between eyebrows Agna Chakra) block right Nostril (Pingala) with Thumb (Fire) and left nostril (Moon) with Ring finger (water) - breath from left - hold - breathout from right Nostril it . if you do it with left hand you will touch thumb fire element on left nostril which is cool and moon which will harm the system. 

performing 15 to 20 minutes of Vishnu Mudra + Alternate Nostril Breathing before meditatin will help focus on deep meditation.

https://www.prana-sutra.com/post/chandra-bhedana-pranayama-left-nostril-breathing

Surya Bhedana -  

Ujjayi Pratiloma, Surya Anuloma-Viloma, Chandra Anuloma-Viloma, and Alternate Nostril Breathing (Nadi Shodhana).

Muladhara, Svadisthana, Manipura Chakras are energized by Vishnu Mudra

ida is great for calming tasks... pingala is great for energy tasks 

lying on your left side or staying in a fetal position on your right for a few minutes opens up Pingala the other direction will open up ida.

performing 15 to 20 minutes of Vishnu Mudra + Alternate Nostril Breathing before meditatin will help focus on deep meditation.

it is explained in the above link that 5 fingers are 5 panchbhoothas. by closing Middle finger earth And Index Air we ground these two and balnce other three.

https://www.prana-sutra.com/post/vishnu-mudra-balance-gesture

inside Sushumna is Vajra inside vajra is Chitra are three parts ...