Alternate nostril breathing is absolutely my favourite pranayama. It calms me, centres me, and allows me to focus on just one thing - the breath.
I needed it this week.
My son has been unwell. And unhappy. It's been a hard week.
At one point, I sat in the bathroom and did a few rounds of alternate nostril breathing. It really helped.
That's all I can say. It works, I'll keep doing it.