The second or third day in Vienna I woke up feeling sick. However, there was no way I could stay in; I had to strengthen my body so I could do my work with refugees thus I resorted to "drastic" measures: breath of fire.
After drinking a glass of tea (room temperature), I dragged myself onto the yoga mat, did just a minute or two of warming up the body (probably cat/cow or swinging the body) followed by 4-5 sets of 108 breaths of fire.