I don't like posting about range but here goes... I was wondering what exercises could be developed into a daily routine to help increase stamina in the upper range. The range itself isn't the problem, I have a good sound and good intonation up to an F over high C. The obvious answer to my question would be "the more you play higher the easier it will get". The type of strength conditioning I am asking about it still being able to hit the notes with the same sound quality as i could at the beginning of the day. Although stamina is linked to the ease in which we play in the lower/mid registers are there any specific exercises apart from the usual long tones and mid range lip slurs that would help achieve stamina in the upper register (high C above) over the long term?