plyometrics
 n.— «Coaches are taught how to make the most out of an athlete through the development of speed, correct weight lifting techniques, nutrition, and plyometrics, a bounding technique to increase speed and power, he said.» —“Power Called the Key Quality for Athlete” by Connie Yori Omaha World-Herald (Neb.) June 21, 1985. (source: Double-Tongued Dictionary)