in the preferred invention , two rigid tubular structures of differing sizes are connected in such a fashion that repeated movement of the smaller tubular structure will , through its connection at its top to one end of the longer tubular structure , cause the longer tubular structure to circle around an axis through the shorter tubular structure . the circular motion required to create such an action exercises the hand , wrist , arm , shoulder , back and chest . a detailed description is provided with reference to the drawings . fig1 is a front elevational view of the apparatus in working order . fig2 shows the various components of the apparatus in disassemblement and arrows show how the components fit together . the exercising device 1 has a hand - held tubular structure 3 on which a rotating tubular structure 5 is mounted . rotating tubular structure 5 has a tubular foam cover 2 , which fits lightly on tube 4 . end caps 6 and 10 are press fit on ends of tube 4 beneath cover 2 . cap nut 8 grips an upper end of bar 16 after it passes through bushing 14 , washers 12 and holes 9 , 15 , 13 and 11 , respectively , in the rotating tubular structure 5 . bar 16 passes through tube 18 , which is covered by hand grip cover 20 forming hand - held tubular structure 3 . bushing 22 and washers 24 are slid over an end of bar 16 . cap nut 26 is pushed and locked on the end of bar 16 . tubular portions 27 and 28 of bushings 14 and 22 fit between an inside of tube 18 and bar 16 . tubular structure 18 serves as the hand piece and actuator of the exercising apparatus . the tubular structure , hand piece 18 and rotatable tube 4 are preferably made of 3 / 4 inch pvc tubing . hand piece 18 slides over solid cylindrical bar 16 , which is preferably made of a solid metal rod , but other rigid materials would suffice . spacer bushings 14 and 22 fit on solid cylindrical bar 16 at points above and below hand piece 18 with their cylindrical portions fitting inward in the hollow , tubular structure of hand piece 18 , holding bar 16 centrally positioned within tubular hand piece 18 while allowing the bar 16 to rotate freely within tubular hand piece 18 . friction reducing washers 12 and 22 slide onto bar 16 at points above and below spacer bushing support structures 14 and 22 . the washers 12 and 24 are preferably made of metal and are positioned on the bar 16 in pairs . when rotatable tubular structure 5 and bar 16 rotate , with bar 16 rotating within tubular hand piece 18 , the washers 12 and 24 reduce friction . a locking cap nut 26 clamps onto the bottom tip of bar 16 protruding from the bottom of tubular structure 18 through spacer 22 and washers 24 . hand grip sleeve 20 , preferably made of a spongy rubber , such as a bicycle hand grip , slides tightly over tubular hand piece 18 . rotatable structure sleeve 2 , also preferably made of a spongy rubber material , slides tightly over rotatable tube 4 . the top of cylindrical bar 16 , extending out of tubular hand piece 18 and through spacer 14 and washers 12 , slides through corresponding groups of holes , 11 and 13 , 9 and 15 , respectively , on the proximal end of rotatable tube 4 and sleeve 2 . locking cap nut 8 clamps on the top end of bar 16 protruding from hole 11 in sleeve 2 . rubber cap 6 fits on the distal end of rotatable tube 4 underneath sleeve 2 . stopper 10 fits on the proximal end of rotatable tube 4 underneath sleeve 2 . fig3 is a perspective view of the assembled exercising apparatus . the invention is directed to light , rapidly repetitive exercise to promote muscular and vascular development and circulation . the present invention is preferably used in pairs . gripping and squeezing the hand grips repeatedly exercises the fingers , tendons and forearm muscles . repeatedly twirling the rotating tubes with elbows supported on a surface exercises upper arm muscles , as well . holding arms unsupported and especially extended outward further exercises back and chest muscles . immediate results are noted by warming feeling in the involved muscles . the exercise device has been acclaimed by testers as useful in body and breast shaping and in promoting strengthening and reducing soreness of muscles , ligaments and tendons having particular relation to sports activities such as tennis . forearms and elbows particularly benefit from use of the invention . in fig4 a office worker 31 supports one elbow 33 suspended and rests another elbow 35 on a desk 37 while gripping handles 3 and twirling the rotating tubes 5 . reversing elbows exercises all upper body and arm muscle groups . in fig4 a person 41 stands and twirls the rotating tubes while holding elbows 43 outward from the body in a flexed condition to exercise all torso and arm muscles . moving elbows 43 to different positions while twirling the exercise devices 1 and squeezing handles 3 further concentrates the light work out . extending arms to full outward position increases the desirable rhythmic muscular stress . fig4 further shows persons 51 resting in prone position on a bed 52 and floor 54 with elbows 53 spaced outward from a stomach . a leg 55 is moved concurrently with the twirling of the exercise devices 1 , to increase exercise . one or more pillows 57 are recommended to keep knees raised when legs are at rest for purposes of proper back support and extension . raising and repositioning elbows 53 further aids the exercise . while the present invention is basic in construction , its simplicity is its utility . its simple construction provides a sturdy exerciser of the hand , wrist , arms , shoulders , back and chest that is safe , does not take an inordinate amount of time to master , and is healthful . while the invention has been described with reference to specific embodiments , modifications and variations of the invention may be made without departing from the scope of the invention which is defined in the following claims .
an arm , wrist , shoulder and chest exerciser which allows maximum movement for those areas being exercised . a hand - held tube has an inner , rotatable axle . this axle attaches to another tubular structure at the top of the hand - held tube and allows this structure to rotate with a repetitive movement of the hand or arm .