Player health is an important concern when you're mapping out a practice. One big consideration is how many jumps your players are getting.
For many years, John Dunning says he didn't know how many jumps his players were making in practice. This changed when he realized that health and performance could be negatively impacted if the athletes were jumping too much. From then on, he would limit players to a specific number of jumps. When the limit was reached, the player stopped practicing.
Another important consideration is overall length of the practice. Terry Liskevych recommends between 90 minutes and two hours. Equally important, he says, is to shorten practices later in the season to give athletes necessary rest and recovery time. An hour of practice may be plenty as the season nears its end.
A saying Liskevych is fond of is, "Rest is best."