Increases in strength have been shown in both periodized and nonperiodized resistance training programs. However, strength improvements do appear to be greater as a result of periodized training.The upper range for strength improvement in the 1RM bench press is reported to be about 17% in nonperiodized training programs and 29% in periodized training programs, while the upper range for 1RM squat is 32% in nonperiodized and 48% in periodized training. In addition, periodized resistance training programs appear to be superior than nonperiodized training programs in generating improvements in vertical jump performance.