A practice club for practicing a sport is described, the practice club including a club shaft; an extendible bump assembly including a stopper movable between a rest position in which it rests against a mounting stop, and an extended position in which the stopper extends a selected distance from the stop. There is also described a sports club or bat with a tension indicator disposed on a shaft of the practice club or bat to indicate tension of an inextensible stringer or resilient element in or on the practice club or bat.

A golf training device comprises a first elastic band loop attached to a strap wrapped around the lead shoulder of the golfer at one end and to the shaft of the golf club at the other end and also comprises a second elastic band loop attached to a strap wrapped around the lead shoulder of the golfer at one end and to the butt end of the grip of the golf club at the other end. When the golfer extends his or her arms to swing the golf club, the resistance provided by the rubber bands helps guide the golfer's swing by informing the proper location of the arms and hands of the golfer relative to the body for maximum leverage throughout the golf swing.

A golf training device comprises a first elastic band loop attached to a strap wrapped around the lead shoulder of the golfer at one end and to the shaft of the golf club at the other end and also comprises a second elastic band loop attached to a strap wrapped around the lead shoulder of the golfer at one end and to the butt end of the grip of the golf club at the other end. When the golfer extends his or her arms to swing the golf club, the resistance provided by the rubber bands helps guide the golfer's swing by informing the proper location of the arms and hands of the golfer relative to the body for maximum leverage throughout the golf swing.