This specificity concept is supported by the physiological changes that are known to occur in the body with various types of resistance training, both normal and explosive. By definition, resistance training includes performing various weight training exercises for a specified number of repetitions (depending on the main desired outcome) generally for multiple sets, with a defined rest period between those sets (again depending on the main desired outcome). Possible desired outcomes include muscular endurance, muscle hypertrophy (size increases), strength, and power, and the emphasis would vary based on the demands of the sport and the time of year in terms of training and competition.
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