Kangaroo movement is a type of exercise that involves jumping up and down in a controlled manner. It is often used as a warm-up exercise before more strenuous physical activity, and can also be used as a form of aerobic exercise. The term 'kangaroo movement' comes from the way kangaroos move by hopping on their hind legs. The crossword solution for this term is 'JUMP', which accurately describes the motion of the exercise.