Based on Volleyball age Categories, generally the age groups are as follows: 
17U*: Athletes born between September 1, 2008 and Dec 31, 2009 (16 months)

* Athletes born September 1-December 31 of the previous year, on a current CCAA or USports volleyball roster, will not be permitted to play in the 17U age class.

The focus of the 17U and 18U Program is to optimize fitness preparation, volleyball-specific skills, and position-specific skills and to commit to a pathway which will also optimize performance. Individual and position-specific training is provided to players with training volumes and intensities gradually raised to high levels. Volleyball skills are performed under a variety of competitive conditions during training. More complex team systems are learned. Training should be position specific. (LTAD, Volleyball Canada)