Abstract: A sport conditioning aid in the form of a viscoelastic plastic weight that grips onto a swingable sport object for example in the game of golf and tennis. The grip-on action for attachment is achieved by selecting the material characteristics of the plastic. The purpose of the sport conditioning aid is to increase the player's swing speed in hitting a sport object such as a ball. The swing speed weight can be used in sport specific training programs with varying incremental weight weights. The swing speed weight specifically conditions the fast twitch muscles and quickens the neural responses over a training period of several weeks.