referring now to the drawings , a combined leg curl and extension exercise device 10 in accordance with the present invention is illustrated , which may be used in conjunction with one or more conventional free weights 12 as shown in fig1 and 2 . broadly speaking , the device 10 includes a frame structure 14 for supporting the device 10 , an exercise unit 16 pivotally mounted to the frame 14 , and an elongated , articulated bench 18 pivotally coupled to the frame 14 adjacent the exercise unit 16 . advantageously , the bench 18 may be alternatively adjusted and held in a first , sitting use position 20 , ideally suited for exercising the quadricep leg muscles , and a second , prone use position 22 , ideally suited for properly exercising the hamstring muscles of the leg ( compare fig1 and 2 ). in more detail , the frame 14 includes an elongated , tubular , square in cross - section , floor - engaging member 24 and a pair of elongated , tubular , square in cross - section , floor - engaging members 26 , 28 respectively secured ( as by welding ) at each distal end of the member 24 . an elongated , square in cross - section , tubular , upright member 30 is fixedly secured to the member 28 adjacent the connection to member 24 , in such a manner that the member 30 is oriented substantially perpendicular to both the members 24 , 28 . another elongated , tubular , square in cross - section , upright member 32 is fixedly secured to the member 24 towards the interconnection to member 26 , and is obliquely - oriented relative to member 24 and substantially coplanar with members 24 , 30 . another elongated , tubular , square in cross - section member 24 is fixedly secured between members 30 , 32 and is spaced , opposed , and substantially parallel to floor - engaging member 24 . an elongated , tubular , square in cross - section , upright member 36 is affixed to member 34 approximately half way between members 30 , 32 and is oriented substantially parallel to member 30 . member 32 includes a u - shaped , apertured clevis 38 secured to the uppermost , distal end thereof and an elongated , tubular square in cross - section member 40 defining an elongated bore 41 therethrough . member 40 is transversely affixed to the member 32 intermediate the clevis 38 and the connection to member 34 . similarly , an elongated , tubular , square in cross - section member 42 is transversely proximaly affixed to the uppermost , distal end of member 36 . likewise , upright member 30 has an elongated , tubular , square in cross - section member 44 transversely proximally affixed to the uppermost distal end of member 30 , and as seen in fig6 the transverse members 40 , 42 , 44 are substantially parallel . the exercise unit 16 includes an elongated , tubular , square in cross - section element 30 having an annularly shaped , centrally apertured socket 52 , secured to one end of element 50 . an elongated , tubular , square in cross - section element 56 is fixedly secured to element 50 adjacent the socket 52 and obliquely - oriented relative to element 50 . a square in cross - section , tubular , elongated element 58 is fixedly secured substantially perpendicular to element 56 towards the distal end of element 56 opposite element 50 . for support , another elongated , square in cross - section , tubular element 60 is obliquely affixed to element 50 adjacent the connection to element 56 , with the element 60 additionally fixedly secured to the distal end of element 58 ( see fig3 ). the free end 62 of element 60 adjacent element 58 is transversely apertured to receive and secure ( as by welding ) a transversely extending , elongated , solid , cylindrical in cross - section weight - receiving bar 64 . as seen in the drawings , the elements 50 , 56 , 58 and 60 are fixedly interconnected ( as by welding ) such that they are all substantially coplanar . the element 56 additionally includes an elongated , flattened , rectangularly shaped plate 66 proximally fixedly secured to element 56 adjacent element 58 . advantageously , the plate 66 includes a pair of resilient pads 58 affixed thereto and oriented away from the element 62 . similarly , the element 50 incorporates an elongated , flattened , rectangularly - shaped plate 70 fixedly secured to the distal end of plate 50 opposite socket 52 . plate 70 , likewise , incorporates a pair of resilient pads 72 affixed to plate 70 and oriented toward weight - receiving bar 64 . as best seen in fig6 - 7 , the exercise unit 16 is pivotally mounted to the frame 14 by the pivotal securement of socket 52 and clevis 38 . to this end , a pin 74 is inserted through the respective apertures of socket 52 and clevis 38 by a set screw or other conventional means . as seen in fig1 and 2 , this pivotal interconnection of socket 52 and clevis 38 allows the exercise unit 16 to pivotally rotate relative to frame 14 . the articulated bench 18 is split into two similar , flattened , padded bench portions 80 , 82 . in more detail , the first portion 80 is generally square in plan shape and includes a tubular , elongated , square in cross - section back member 84 defining an elongated bore 86 therethrough ( fig6 and 7 ). a pair of similarly shaped , elongated , square in cross - section tubular members 88 , 90 are perpendicularly affixed ( as by welding ) to each distal end of the back member 84 and oriented parallel to each other , with the members 84 , 88 , and 90 presenting a u - shaped configuration with the bore 86 exposed . each member 88 , 90 is apertured as at 92 , 94 such that the apertures 92 , 94 are aligned relative to each other and oriented parallel to the back member 84 . a pad 96 is mounted on the members 84 , 88 , 90 and includes a complementally square shaped flattened base 98 affixed to the members 84 , 88 , 90 ( as by gluing ). a square - shaped , flexible cushion 100 is affixed to a similarly shaped , rigid back 101 ( as by gluing ) with the exposed portion of cushion 100 encapsulated in a synthetic flexible sheet material 102 ( such as vinyl ). the back 101 is then mounted to the base 98 ( as by gluing ), thereby completing the pad 96 of first portion 80 . for purposes which will be made clear , the first portion 80 additionally includes a pair of l - shaped , obliquely - oriented , cylindrical handles 104 mounted on members 88 , 90 , respectively towards the joinder to back member 84 . the elongated , rectangularly shaped , second portion 82 is similar in construction to the first portion 80 . a pair of elongated , square in cross - section , tubular members 106 , 108 are oriented parallel to each other and spaced apart a distance slightly greater than the distance between first portion members 88 , 90 . an elongated , angle iron 110 having a flattened , rectangularly shaped first piece 112 perpendicularly interconnected to a second piece 114 , is secured between members 106 , 108 towards the distal end of the second portion 82 opposite first portion 80 . a similarly shaped angle iron 116 having first and second pieces 118 , 120 , respectively , is secured between members 106 , 108 parallel to and spaced apart from the angle iron 110 . advantageously , the angle irons 110 , 116 are affixed between the members 106 , 108 such that the included angles of the respective l - shaped angle irons are oriented away from each other ( fig6 and 7 ). a resilient pad 122 is affixed to the members 106 , 108 and broadly includes a rectangularly shaped , rigid , flattened base 124 secured between the members 106 , 108 ( as by gluing ) adjacent the end opposite angle iron 110 . a rectangularly shaped , flexible , resilient 126 ( e . g . foam rubber ) is affixed to a similarly shaped , rigid back 127 ( as by gluing ) with the exposed portion of cushion 126 then encapsulated in a flexible sheet material 128 ( such as vinyl ). the back 127 is then secured to the base 124 and portions of members 106 , 108 . the ends of members 106 , 108 opposite angle iron 110 are apertured as at 130 , 132 to present a set of aligned apertures oriented parallel to the angle iron 110 . the structure of the second portion 82 is then completed by the addition of a pair of elongated , cylindrical handles 134 respectively to the members 106 , 108 adjacent the angle iron 110 and oriented away from the pad 122 . the first and second portions 80 , 82 of the bench 18 are hingedly interconnected by the sliding reception of the back member 84 between the members 106 , 108 such that the apertures 130 , 132 are aligned with the bore 86 . in this position , an elongated , cylindrical in cross - section , solid axle 136 is received through the apertures 130 , 132 and bore 86 , whereupon an annular bushing 138 is secured at each exposed end of the axle 136 completing the hinged interconnection . the bench 18 is then pivotally coupled to the frame 14 in a similar fashion . that is , the distal ends of the members 88 , 90 are received over the distal end of the frame member 40 such that the apertures 92 , 94 are aligned with the bore 41 . another elongated , cylindrical in cross - section , solid axle 140 is received through the apertures 92 , 94 and bore 41 and secured in place by the respective annular bushings 142 . in use , it is seen that the device 10 is easily adaptable between the first , sitting position 20 and the second , prone position 22 , depending on the exercise desired . as best seen in fig1 , the first portion 20 of the bench 18 places the first and second portions 80 , 82 approximately perpendicular to each other . in this regard , the first portion 80 is slightly upwardly angled to place the legs in a better position for exercise . as seen in fig7 the bench 18 in the first position 20 is at least supported at two different locations , that is first at the pivotal coupling of the portion 80 to the member 40 and secondly , at the engagement of the angle iron 116 with the member 42 . additionally , it is seen that in the preferred embodiment , the angle iron 116 is affixed to the second portion 82 in such a position that the back member 84 engages the member 34 , thereby providing a third support location for the bench 18 in the first position 20 . the simple connection between the angle iron 116 and member 42 allows the bench 18 to be easily transformable into the second , prone position as illustrated in fig6 . as seen in fig6 the bench 18 in the second position 22 is supported only at two locations to the frame 14 . first , the bench 18 is supported at the pivotal coupling of the first portion 80 to the member 40 and second , the bench 18 is supported by the engagement of the angle iron 110 to the member 44 . as seen in fig3 the bench 18 is held in this second position 22 by virtue of the fact that the distance along the bench 18 between the pivotal coupling member 40 to the angle iron 110 is greater than the straight line distance between the pivotal coupling member 40 and the member 44 . therefore , with the angle iron 110 engaging the member 44 , the bench 18 is slightly upwardly bowed along the hinged connection between the portions 80 , 82 and held in this gabled position by the separate engagement of the pieces 112 , 114 to respective faces of the member 44 . thus , the angle iron 110 secures the bench 18 in a vertical direction and additionally upwardly biases the bench 18 in a bowed configuration . a seen in fig6 the bench 18 in the second position 22 is slightly spaced from the member 42 receiving no support therefrom . the configuration of the device 10 in the first , sitting position 20 , as best seen in fig1 places the body in a proper exercise position to exercise the quadricep muscles of the leg while fully supporting the back . thus , the first position 80 ideally aligns the leg with the exercise unit 16 while the second portion 82 provides support the back . further , the oblique orientation of the frame member 32 allows the exercise unit 16 to describe an arcuate path during exercise greater than 90 °. this is particularly advantageous in that in exercising the quadricep muscles , the beginning of the exercise and the full extension of the leg are critical phases in developing the quadricep muscles . as those skilled in the art will appreciate , the handles 104 , along with fully supporting the back and the slight upward angle of the legs , de - emphasizes the other muscle groups and ideally concentrate the exercise on the development of the quadricep muscles . as may be appreciated , there are many ways to vary the resistance of the exercise unit 16 to the pivoting exercise action , with the preferred embodiment showing the simple addition of conventional free weights 12 secured to the unit 16 as at weight - receiving bar 64 . in the second , prone position 22 , as best seen in fig2 exercising using the device 10 of the present invention optimally develops the hamstring muscles . by laying on the bench 18 in a prone position with the stomach approximately oriented over the hinged interconnection between the portions 80 , 82 , and grasping the handles 134 , the body is ideally situated to emphasize the hamstring muscles . as those skilled in the art will appreciate , this angled orientation of the legs relative to the exercise unit 16 particularly allows the de - emphasis of the buttocks muscles during the exercise and further , allows the body to contact the bench 18 over a greater surface area , thus relieving the pressure on the kneecaps . as seen in fig1 and 2 , the device 10 of the present invention is easily used in either the quadricep or hamstring exercise . the bench 18 is easily adjustable between the first position 20 and the second position 22 to thereby optimally emphasize the desired muscle groups during exercise . additionally , the incorporation of such an effective dual position bench into a single unit , results in a significant cost savings .
an adjustable leg exercise device is provided which is easily adjustable between a sitting position and a prone position , whereby the body is placed in an ideal position for exercising the quadricep muscles and hamstring muscles respectively . the device preferably includes a floor - engaging support frame and a weight - receiving exercise unit pivotally secured adjacent the upper portion of one end of the support frame . the exercise unit includes a weight - receiving structure for selectively attaching different amounts of weights , to vary the resistance to the pivoting action . additionally , the unit also presents a pair of leg - engaging regions , the first region positioned for use in the quadricep exercise while the second region is positioned for use in the hamstring exercise . an articulated , flat , padded bench is pivotally secured to the upper portion of the frame , with the bench - frame pivotal connection located adjacent the frame - exercise unit pivotal connection . the bench includes two portions hingedly interconnected such that the bench can be positioned in a sitting use position for the quadricep exercise or alternatively , positioned into a gabled , prone use position for the hamstring exercise . advantageously , the frame includes supports for holding the bench in either of the selected positions .