Rest

Rest is very important to an athlete. During a week period, we have 3 days off. When I say we have it off, I mean our coach expects us not to workout. This is very important because it allows our bodies to rest and to avoid injuries. Also, it allows us to practice at a higher level than we would usually, as our bodies are well rested and we are not sore from the previous practices.
In my personal opinion, all sports teams, and recreational exercisers should use rest periods in their practice and workout schedules.