In Natsuko's yoga class, middle-aged and older students imitate poses to improve energy. A few married couples participate, and it is very hot.In Natsuko's yoga class, middle-aged and older students imitate poses to improve energy. A few married couples participate, and it is very hot.In Natsuko's yoga class, middle-aged and older students imitate poses to improve energy. A few married couples participate, and it is very hot.