Abstract: Player swung devices equipped with accessories designed to increase aerodynamic drag or air resistance and thereby promote the development of muscular strength and coordination. The accessories are aerodynamically neutral and are so constructed that they can be slipped over, and secured to, a barrel, shaft, or comparable part of the player swung device or fabricated as an integral part of the device.The accessory is in the form of a hollow, thin shelled sphere of from 2-18 inches in diameter, with opposed openings through which the shaft of the player device is inserted. Each opening includes an array of deflectable tabs thereabout to functionally engage the accessory onto the player device shaft. The tabs may be integral with the sphere or formed on inserts mounted within the openings. An additional wedge arrangement may be provided with the tab or a hook and eye or "Velcro" type fastener may supplement the tabs in holding the accessory on the device.