Pranayama ensures more oxygen to lungs and good for hearts too. Pranayama tones up kidney and control the functions of nervous system. Kumbhaka or retention of breath helps supply of oxygen or exchange of oxygen and carbon dioxide thus facilitates better work of lungs and helps brain to work more efficiently.
Nadi Sodhana/Shuddi.
Shitali/Shitakari Pranayama.
Ujjayi Pranayama.
Kapalabhati Pranayama.
Bhastrika Pranayama.
Bhramari Pranayama.