Sports swing training aid

An air resistance appliance that is easily attached to the shaft of a golf club or a baseball bat and that is quickly and easily collapsed into a small, lightweight package for storage or transport with the user as in his or her golf bag, comprising:

• a circumferentially foldable axially elongated substantially cylindrical central hub for releasable locking to the elongated shaft of a golf club or baseball bat, the central hub being formed from a plurality of semi-cylindrical hub sections each hub section including an arc-like inner surface and an axially extending edge hinged to an adjacent hub section to swing outwardly away from the adjacent hub section to form an elongated opening for receiving the elongated shaft and to swing inward toward the adjacent hub section to combine with other of the hub sections to form a substantially cylindrical inner hub surface for engaging and locking to the elongated shaft;
• a plurality of the hub sections also each include an outer surface carrying an outwardly extending vertical channel for releasably and axially receiving a paddle-like blade extending radially from the hub;
• and
• one or more user operable latches each secured to a first end-most one of the plurality of hub sections for releasably locking the first end-most hub section to a second end-most hub section of the central hub to tightly and releasably secure the central hub to the elongated shaft with the plurality of blades extending radially from the central hub to provide wind resistance to a swinging of the elongated shaft by a user while allowing for a simple collapsing of the appliance into a compact easily transportable package.