28 tubular structures of composite materials for gymnastic equipment, for sporting equipment, or for exercise equipment; gymnastic bars and weight lifting machines; tubular shafts of composite materials for use in athletic and sporting articles, namely golf clubs, fishing rods, hockey sticks, baseball bats, tennis racquets, squash racquets, racquetball racquets, badminton racquets, table tennis racquets, and rowing oars and paddles