the present invention comprises a convenient piece of fitness equipment that provides the opportunity to perform the fly movement at a different rate of resistance in an isokinetic contraction . the apparatus of the present invention stimulates and shapes the muscles of the chest , and also contributes to increasing the size of the pectoralis major and pectoralis minor muscles , without causing any harm to the user . the apparatus of the present invention enables the user to perform the exercise movement in the horizontal plane . as a result , it is simple to use and comfortable on the user &# 39 ; s body , thereby playing a vital and important role in strengthening and shaping the user &# 39 ; s chest . in addition , by using the apparatus of the present invention with different types of body movement , the apparatus may be used to exercise and develop various muscles of the body , including the gluteus maximus , hip muscles , leg muscles , and abdominal muscles . its easy to use design allows the user to effortlessly change its resistance to the user &# 39 ; s personal preference to reach their individual goals . whether used in home , at work , at the park , or even while traveling , its compact design allows for easy maneuverability . as depicted in fig2 a , the apparatus of the present invention comprises one or more arm supports 2 each connectable to an elastic cord 4 . each arm support is of a size and shape to provide a surface against which a user &# 39 ; s forearm may be placed . each arm support preferably is approximately 6 inches wide and approximately sixteen inches long , although other dimensions are also possible provided they dimensions are sufficient to provide support to a user &# 39 ; s forearm . the shape of each arm support may also be varied to provide improved comfort and support , and to minimize the amount of material required , as depicted in fig3 . the arm supports are preferably manufactured of a lightweight material which is able to repel moisture from sweat , and which is very durable and easily cleaned with soap and water . preferably , the material used for the arm supports is moldable to allow the arm supports to mold to the user &# 39 ; s forearms for added support . a preferred material is non - toxic polyethylene / ethyl vinyl acetate (“ pe / eva ”) foam , although other materials including certain plastics and fabric or foam covered wood or metal are also possible . each arm support is provided with strapping 6 to connect the arm support to the elastic cord stretchable from the arm supports . the strapping is preferably 1 inch to 1 . 5 inches wide , although other widths are also possible . the strapping also provides support for the forearms , assisting in maintaining the forearm position on the arm support . as shown in fig4 , preferably , strap adjustment means 8 are provided on the strapping to enable the user to adjust the strapping to the dimensions of their arms . in one embodiment , the strapping may be significantly wider than 1 . 5 inches to provide lateral support to the forearms . in yet another embodiment shown in fig5 , the arm supports may further include side supports to provide lateral supports to the forearms . the strapping may be a canvas - type material or other strong fabric with length adjustment means . alternatively , the strapping may include velcro fastening means to allow easy length adjustment . in the preferred embodiment , the arm supports include one or more openings 10 near one end for placement therethrough of one or more fingers of the user &# 39 ; s hands , as seen in fig6 . the opening may further include contours for the placement and support of individual fingers . in an alternative embodiment , the arm support may instead include finger contours along one end instead of an opening . in yet another embodiment , the finger grip may be achieved with a channel for insertion of the fingers having a single opening near or at one end of the arm support . the apparatus of the invention also comprises connection means 12 for connecting the strapping to an elastic cord stretchable between the arm supports . the elastic cord may also be directly attachable to the arm support . preferably , the connection means is a triangular ring enabling ease of connection of the elastic cord thereto using clips 14 connected to the ends of the elastic cord . the triangular shape is preferred to limit movement of the elastic cord within the connection ring , but other shapes , including circular connection rings , are possible . preferably , the connection means is manufactured of a strong metal such as steel , but other strong materials are also possible . in a preferred embodiment , the invention further comprises anchor means for attachment of the elastic cord to a fixed point which provides the resistance to the user . the invention preferably comprises one elastic cord for use with each arm support , each elastic cord connectable to the anchor means . however , it is also possible to connect the arm supports to opposing ends of a single elastic cord and to connect the elastic cord to anchor means at a midpoint of the elastic cord , or to run the elastic cord around a fixed anchor point such as a tree or pole which provides the resistance required . an alternate embodiment of the invention , having lateral arm support walls 16 , is shown in fig1 and 14 . in operation , as depicted in fig7 to 9 , a pectoral exercise may be carried out by securely attaching the elastic cord or cords approximately 80 ″ from the ground . other heights are also possible , depending on the height of the user . the strapping of the arm supports may then be attached through the connection means to the end of the elastic cord or cords . the user places the forearms into the arm supports and firmly grips the top of the arm supports with the fingers while in the eccentric contraction . the user stands with the back to the anchored cord at a desired distance selected to obtain the desired resistance . placing one bent leg forward with the rear leg on its plantar flexion , the arms are extended out to the sides with elbows bent 90 °, mimicking a prior art pec deck as depicted in fig1 . both arms are then drawn together along an arc until the arm supports are touching . preferably , the user will tighten the chest muscles at the end of the concentric phase for maximum stimulation of the inner area of the chest muscles . finally , the user draws the elbows back outwardly along the arc to return the arm supports to the side positions . the movement may then be repeated from the starting horizontal plane position for a desired number of repetitions . apart from development of the pectoral muscles , the apparatus of the present invention may be used to develop the muscles of the core . the core is the foundation of the human body . it is comprised of the muscles that span the hips , abdominals , back and shoulders . for every move from lifting a heavy box to swinging a bat , the core needs support . developing a stronger core starts with rethinking the crunch . the effectiveness of hundreds of crunches on the ground is questionable . rather , core exercises should engage the user &# 39 ; s stabilizer muscles and challenge their balance . such core workouts may incorporate the apparatus of the present invention for an added challenge . as shown in fig1 to 12 , the present apparatus may easily be used to help strengthen and shape the mid section . fig1 shows a user in a supine position with the elastic cord fixed from behind . arms are raised above the head and slightly bent . hands are still firmly grasping the top of the arm supports . feet may be raised or flat on the floor . the user then contracts the abdominal muscles and bends forward slowly , raising the shoulders slightly off the ground until their body is at a 45 degree angle , as depicted in fig1 . at an intermediate level , the user may lift the legs off the ground straight in front , as shown in fig1 . from the foregoing , it will be seen that this invention is one well adapted to attain all of the ends and objectives herein set forth , together with other advantages which are obvious and which are inherent to the apparatus . it will be understood that certain features and sub - combinations are of utility and may be employed with reference to other features and sub - combinations . this is contemplated by and is within the scope of the claims . as many possible embodiments may be made of the invention without departing from the scope of the claims . it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense . it will be appreciated by those skilled in the art that other variations of the preferred embodiment may also be practiced without departing from the scope of the invention .
a portable exercise apparatus comprising one or more planar arm supports for supporting one or both of a user &# 39 ; s forearms ; strapping means for securing each arm support to the user &# 39 ; s forearms ; one or more elastomeric cords attachable between each planar arm support and one or more anchor points ; and anchor means for securing each elastomeric cord to the anchor points . the apparatus may be used for pectoral exercises , core muscle exercises , and other exercises .