En garde! Paula and Alyssa investigate the energy and impact of different fencing moves. Kha and Peta, young martial arts athletes, determine how different tae kwon do moves challenge their bodies’ skeletal and muscular systems and then apply what they learned in competition. Dr. Joel Boyd orthopedic surgeon works with athletes to get them ready for the game.

Originally released by Big Media Holdings LLC, 2013. Streaming video file encoded with permission for digital streaming by Infobase on February 10, 2017.

Sword Play (6:09); --Sword Play: Part Two (3:29); -- Science is It (2:10); -- Kick It (4:53); -- U.S. Tournament of Champions (2:56); -- Credits: Energy (0:40); .