to maintain element 47 in place during exercise in fig5 another embodiment is shown whereby exercise device 50 comprises a longitudinal member 51 having a pair of threaded rods 52 52 39 therein weight elements 53 53 39 are received on threaded rods respectively 52 52 39 and are joined through neck portion 54 by connecting rod 55 which is attached to threaded rods 52 and 52 39 and as illustrated threaded rod 52 is oppositely threaded from rod 52 39 thus upon rotation of threaded rod 52 such as by crank mechanism 56 as shown in fig5 a connecting rod 55 and threaded rod 52 all turn simultaneously and weight elements 53 53 39 move in opposite directions also simultaneously as further shown in fig5 a crank mechanism 56 includes foldable handle 57 which can be closed downwardly as seen in fig5 for storage purposes in fig5 b guide 64 prevents weight element 53 from rotating on threaded rod 52 guides 64 64 39 consist of a thin metal wire when needed handle 57 is manually raised and crank mechanism 56 rotated to adjust the positions of weight elements 53 53 39 as further shown in fig5 threaded rod 52 includes shaft receptacle 58 for motorized rotation of threaded rod 52 39 as depicted in fig7 electric motor 59 is conveniently positioned within holder 60 which may be for example wall mounted in a gym or spa receptacle 58 can thus be positioned on the shaft of motor 59 which is controlled by two way switch 61 weight elements 53 53 39 can be moved by switch 61 to correspond to the series of numbers along longitudinal member 51 as shown in fig7 an electronic weight position.