The purpose of this experiment was to examine changes in strength and power measures accompanying traditional and ballistic training during in-season competition. Fourteen collegiate women volleyball players were trained for 11 weeks with periodized traditional and ballistic resistance training. There was a 5% decrease (p<0.05) in approach jump and reach height during the traditional training period (pre to mid), and a 5% increase (p<0.05) during the ballistic training period (mid to post), but values were not different from pre to post. There were significant decreases (p<0.05) in contact time during drop jumps (15% mid to post) and minimum dip height in countermovement jumps (7% mid to post and 16% pre to post) during ballistic training. Traditional resistance training displayed significant decreases in speed related measures, while ballistic training displayed significant increases in these same variables. A combination of traditional and ballistic training can maintain jump height over the competitive season. / Department of Biology