The best way change your mood with yoga

Pranayama (Sanskrit prana=vital energy; ayama= to expand) is a form of yoga which places particular emphasis on techniques of breathing.

In this research made by the Department of Experimental Psychology, University of Oxford. They studied The effects of three different procedures, relaxation, visualization and yogic breathing and stretch (pranayama) on perceptions of physical and mental energy and on positive and negative mood states have been assessed in a group of normal volunteers.

the results were that Pranayama produced a significantly greater increase in perceptions of mental and physical energy and feelings of alertness and enthusiasm than the other two procedures. Relaxation made subjects significantly more sleepy and sluggish immediately
after the session than pranayama. Visualization made them more sluggish but less content
than pranayama.

In agama yoga school we study in great detail the science of pranayama and breathing exercises.