The better solution to feeling blue, according to neuroscientists is feeling grateful, because gratitude boosts the neurotransmitters dopamine and seratonin. Feeling gratitude makes your brain feel happy....
"Without the sustained intention of focusing on the present, and calming the mind, going to a yoga class is literally just going through the motions."
- "Yoga: Changing the Brain's Stressful Habits" by Alex Korb, Ph.D from his PreFrontal Nudity column for Psychology Today
I found this...