as can be seen by reference to the drawings , and in particular to fig1 the golf training device that forms the preferred embodiment of the present invention is designated generally by the reference number 10 . the swing training device 10 comprises a generally spherical member 20 and a hand grasping member 40 wherein , both of these structural components will now be described in seriatim fashion . as shown in fig1 , 2 , 4 , and 5 , the generally spherical member 20 comprises a ball 21 having either a solid or hollow interior and preferably fabricated from a material having a high coefficient of friction such as hard rubber or the like . in addition , the exterior surface of the ball 21 is provided with a variety of visual indica such as a meridian line 22 that visually divides the ball 21 into two distinct hemispheres 23 24 wherein , the hemispheres 23 24 can be distinguished from one another by other visual indicia such as different solid color schemes and / or distinctive symbols depicted in phantom in fig1 and 2 . furthermore , as can best be seen by reference to fig5 and 6 , each of the hemispheres is also provided with a plurality of finger registration indicia 25 in the form of dots , or the like , and the meridian line 22 is also provided with an enlarged circular visual target 26 the purpose and function of which will be explained in greater detail further on in the specification . turning now to fig4 through 8 , it can be seen that the hand engaging member 40 comprises a pair of anchor elements 41 42 secured to the ball 21 and disposed at spaced locations along the meridian line 22 wherein , one of the anchor elements 42 is disposed proximate to but spaced from the enlarged visual target 26 and further comprises an elongated resilient strap element 50 . in the preferred embodiment of the invention illustrated in the drawings , the intermediate portion 51 of the strap element 50 is fixedly secured to an anchor element 41 which is fixedly secured to the ball 21 and the opposite ends 52 53 of the strap element 50 are releasably engaged by the hinged anchor element 42 . furthermore , the hinged anchor element 42 has a fixed portion 42 ′ and a movable portion 42 ″ wherein , the opposed surfaces of the portions 42 ′ and 42 ″ are provided with cooperating hook and loop fasteners 43 ″ 43 ′ shown in fig6 through 8 . as can also be appreciated by reference to fig6 through 8 , one end 52 of the strap element 50 has an interior face provided with the loop component 52 ′ and an exterior face provided with the hook component 52 ″ of a cooperating hook and loop fastener , while the other end 53 of the strap element 50 also has an interior face provided with the loop component 53 ′ and an exterior face provided with the hook component 53 ″ of a hook and loop fastener . the adjustment of the hand engaging member 40 occurs by reversing the sequence depicted in fig5 through 8 wherein , the loop component 52 ′ is first engaged with the hook component 43 ″ followed by the loop component 53 ′ engaging either the hook component 52 ″ and / or the hook component 43 ″. then the looped component 43 ′ may be brought into contact with one or more of the hook components 43 ″ 52 ″ and 53 ″. the method of employing the training device 10 is depicted in fig1 through 3 wherein , the user inserts both his / her hands beneath the resilient strap element 50 and beyond the knuckles on opposite sides of the meridian line 22 such that the user is looking downwardly upon the enlarged visual target 26 and the thumbs and fingers are aligned with the finger registration indicia 23 on both hemispheres 23 24 . in the sequential swing illustration depicted in fig3 the user is a right handed golfer wherein , the left hemisphere 24 is darker in color than the right hemisphere 23 . to initiate the strengthening and training swing sequence , the user inserts his or her hands beneath the strap element 50 to maintain the hand grasping member 40 in light frictional contact with the ball 50 . the user then bends his / her knees slightly and leans their upper torso forward into the normal golf ball addressing position . with the user &# 39 ; s attention focused on the enlarged visual target 26 , the user begins their backswing motion which progressively increases their sight picture of the darker colored hemisphere 24 until the lighter colored hemisphere 23 is completely obscured well into the backswing arc . then as the user &# 39 ; s downswing begins , the lighter hemisphere 23 will once again become partially visible as the swing arc approaches the imaginary point of impact whereupon , the lighter colored hemisphere 23 will fill the user &# 39 ; s field of vision during the follow through and release phases of the swing plane . at this juncture , it should also be noted that given the fact that the average weight of the spherical member 20 will be in the four to six pound range , the weight and momentum of the ball will literally force the user to follow through with the proscribed hip turn at the proper point in the swing sequence . the essential feature of the invention , in effect , is the passive gripping of the hands by the strap element 50 . this is critical in that during the forward swing progression , where the benefit of the exercise is carried out to its fullest , the exerciser need not exert an opposite force upon the ball in order to maintain its grasp . that is , as the user &# 39 ; s hands move through the main swing movement , the exerciser &# 39 ; s concentration can be on the manner in which his or her arms , shoulders , and back are positioned during the exercise rather than having to concentrate upon grasping the ball , in effect , forcing the hands against the ball in opposition to the swing movement . if such opposite action were necessary , then the muscles of the left side of the golf exerciser , assuming a right - handed swing from right to left , would be forced to flex inwardly to maintain a positive grasp of the ball which would detract from the exercise . in addition , the passive attachment of the hands to the ball enables the swing to be carried out at a much fuller extend of the forward swing then would be possible without such attachment . turning now to fig9 through 12 , it can be seen that in the alternate version of the preferred embodiment , the swing training device 10 ′ also comprises a generally spherical member 20 ′ in the form of a hollow ball 21 ′ having a pair of elongated slots 27 27 which are disposed on the opposite sides of , and angled toward the meridian line 22 ′ that visually divides the ball 21 ′ into two different hemispheres 23 ′ 24 ′. in addition , the meridian line 22 ′ is further provided with an enlarged visual target 26 ′ wherein , the meridian line 22 ′, the hemispheres 23 ′ 24 ′ and the visual target 26 ′ of the alternate version of the swing training 10 ′ serve the same purpose and function as their like numbered counterparts in the preferred embodiment of the swing training device 10 . as can best be seen by reference to fig9 and 10 , the exterior surface of the hollow ball 21 ′ is further provided with a pair of thumb pads 28 28 and a pair of generally cylindrical palm pad cushions 29 29 that will align the user &# 39 ; s thumbs on the opposite sides of the meridian line 22 ‘ when the user ’ s fingers are inserted through the slots 27 27 and into the hollow core 31 of the ball 21 ′ as depicted in fig1 and 12 . still referring to fig9 and 10 , it can be seen that this invention also contemplates teh use of thumb recesses 28 ′ 28 ′ or thumb holes 28 ″ 28 ″ adjacent the thumb pads 28 28 to enhance the user &# 39 ; s grip on the hollow ball 21 ′. while the slots 27 27 , the thumb pads 28 28 , and the palm pad cushions 29 29 represent the most visible structural distinctions between the preferred embodiment 10 and the alternate version 10 ′ the most significant distinction resides in the peripheral weighting of the hollow core 31 of the ball 21 ′. as can be seen by reference to fig9 and 12 through 14 , the hollow core 31 is provided with a peripheral weighting either in the form of an independent weighted insert 30 or by an increased thickness of the core material 32 which defines the hollow core 31 . it should also be noted that the offset peripheral weighting is centered around the meridian line 22 ′ at a point proximate the opposed thumb pads 28 28 and / or the finger slots 27 27 such that the extra weight is focused in the vicinity of the user &# 39 ; s hands and wrists to minimize the torquing effect of the ball 21 ′ as it is brought through the basic swing plane motion illustrated in fig3 . some other noticeable differences between the preferred embodiment and the alternate version are as follows : training device 10 involves passive engagement with the exterior surface of the ball 21 whereas , training device 10 ′ requires active engagement with both the interior and exterior of the ball , and , training device 10 employs a uniformly weight distributed solid or hollow core ball 21 whereas , training device 10 ′ employs a peripherally offset weighted ball 21 ′. furthermore , as depicted in fig1 , the overall weight of the hollow ball 21 or 21 ′ may be varied by increasing the thickness of the core material 32 so that different weight balls 21 21 ′ maybe employed by golfers having different skill levels , or as depicted in fig1 , the thickness of the core material 32 is varied to produce the peripheral weighting . as shown in fig1 , when using a uniformly weighted spherical ball 21 , the user &# 39 ; s hands are naturally aligned along the longitudinal axis of their forearms . however , when the user grasps the peripherally weighted spherical ball 21 ′, the offset placement of the weighted insert 30 causes the user &# 39 ; s hands to be “ cocked ” at an angle of “ θ ” which ranges between 15 ° and 45 °. this “ cocking ” forces the user &# 39 ; s hands toward their belt buckle at the beginning of the swing at the proper angular orientation to replicate an “ inside / out ” golf swing as the user moves the ball through the swing plane . although only an exemplary embodiment of the invention has been described in detail above , those skilled in the art will readily appreciate that many modifications are possible without materially departing from the novel teachings and advantages of this invention . accordingly , all such modifications are intended to be included within the scope of this invention as defined in the following claims . having thereby described the subject matter of the present invention , it should be apparent that many substitutions , modifications , and variations of the invention are possible in light of the above teachings . it is therefore to be understood that the invention as taught and described herein is only to be limited to the extent of the breadth and scope of the appended claims .
a training device for strengthening the swing muscle groups of a golfer while enhancing proper muscle memory wherein , the device includes a ball having a meridian line that divides the ball into two visually distinct hemispheres and further including a hand engaging member including a pair of anchor elements and a resilient strap element connected to the ball and bisected by the meridian line passively engage the golfer &# 39 ; s hands against the ball during repetitive swing movements .