Hi Kalina, I believe this is something you are looking for. It released some detailed informations of his asthma. Actually his physical conditions was explained quite a lot in previous magazines.
And Kalina, I really appreciated your kind words.Yuzuru has been suffering asthma since he's 3 years old, even now he still has to take medicine twice daily, morning and night. Meanwhile he also has hay fever, all influences on his poor stamina. Sometimes Yuzuru has trouble to get sleep because of sensitive nerves, and also he has a small appetite.