Sports at these stages become much more competitive and more highly skilled. Teens may navigate towards a particular sport, but continue to encourage participation in multiple sports or physical activities. Injuries due to changes in the body or overuse may take place at this time. Teens may also start to envision their future in sports by striving to play for the high school team or play in college. They may seek extra training or put forth more effort in skill development. Their understanding of more complex strategies increases, and practices/training should reflect such understanding.