Article: Yoga research :)

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Article.1 link:  effects of yoga on brain waves and structural activation a review article

“examined brain waves, alpha waves
amplitude and frequency, which is associated with an increased
perception of calmness, was increased after breathing, meditation,
and asana-based yoga practice. Beta waves, which are associated
with task performance, were also seen to improve in frequency and
amplitude during and after mainly breathing based yoga. Theta
wave activity, which is naturally occurring during repetitive tasks
and autonomy, improved primarily after asana and breathing based
yoga practice. The overall increase in brain wave activity may
explain the decreases in anxiety and increases in focus that are
evident after yoga training programs.” —Pg.117

Refs:

Picture: http://www.prevention.com/fitness/yoga/yoga-poses-beginners

Article: Desai, R, Tailor, A, & Bhatt, T 2015, ‘Effects of yoga on brain waves and structural activation: A review’, Complementary Therapies In Clinical Practice, 21, pp. 112-118, ScienceDirect, EBSCOhost, viewed 17 August 2015.