Applying Sport Seasons to Periodization
Simply enough, this mesocycle is in place to allow either active, or complete rest for the athlete since they just came off of a long competition season.
This largely consists of preparatory training and can last for several weeks. If an athlete's off-season lasts for a long period of time (16-24 weeks) there may even be time for 2 cycles of the three main macrocycles; hypertrophy/endurance, basic strength, strength/power.
This mesocycle contains the late stages of the preparatory period and transitions the athlete into competition-mode. This is the essential transition from strength/conditioning training into sport-specific training.
This is where scheduling may need to get creative in order to schedule mesocycles or microcycles around competitions, tournaments, or the most important games/events.