Our hypothesis was that the addition of an 8-week lower limb plyometric training program (hurdle and depth jumping) to normal in-season conditioning would enhance measures of competitive potential (peak power output [PP], jump force, jump height and sprint running velocity) in professional handball players. The subjects (age 23 ± 0.7 years, body mass 88.5 ± 4.7 kg, height 1.86± 0.06 m, body fat...