dr. carsten lekutat: around 15 million people worldwide suffer as troke every year.condition is something that changes your life forever. the best treatment you'll get in a stroke unit. and today, i visit dr. martinj ebinger here in the stroke unit in the charite at the heart of berlin. >> strokes kill around 6

dr. carsten lekutat. dr.kutat: berlin is the european city with the longest history of teaching yoga. there were yoga rooms even in the 1920s. but yoga has come a long way, as you can see in modern yoga studios. is yoga good for you, or can it even be dangerous to your health?