fig1 a shows a first preferred embodiment of the present invention . at one end , torque arms 1 a and 1 b are connected to leg mounts 35 a and 35 b , respectively . at their other ends , torque arms 1 a and 1 b are pivotally attached to shaft 4 that extends through shaft housing unit 3 ( fig1 c ). forward and backward motion of the legs ( such as a walking or running motion ) causes torque arms 1 a and 1 b to automatically pivot about shaft 4 . the user can turn knob 5 a or knob 5 b clockwise to increase the amount of torque required to pivot torque arms 1 a and 1 b around shaft 4 . in other words , as knob 5 a or knob 5 b is tightened greater resistance is produced . therefore , it becomes increasingly more difficult for the user to overcome the resistance and for the user to move his legs forward and backward in a walking or running motion . by overcoming this increased resistance the user exercises a variety of muscles and improves his physical condition . also in a preferred embodiment , handles 6 a and 6 b are connected to handle rods 8 a and 8 b via rubber cords 7 a and 7 b ( fig1 a , 2 a - 2 d , and 3 a ). by pulling handles 6 a and 6 b , a user can further exercise muscles in his arms and upper body . torque arm 1 a preferably has three telescopic sections 1 a 1 , 1 a 2 and 1 a 3 ( fig1 a , 1 b ) that connect to main torque arm section 1 a 4 . likewise , torque arm 1 b preferably has three telescopic sections 1 b 1 , 1 b 2 and 1 b 3 that connect to main torque arm section 1 b 4 . in a preferred embodiment , the perpendicular distance from shaft 4 to the line formed by the telescopic sections is approximately 12 inches . fig4 and 5 show a simple side view of a portion of torque arm 1 a . in the preferred embodiment , telescopic section 1 a 1 slides easily inside telescopic section 1 a 2 . telescopic section 1 a 2 slides easily inside telescopic section 1 a 2 . telescopic section 1 a 3 slides easily inside main torque arm section 1 a 4 . in fig4 torque arm 1 a is extended so that the overall length of torque arm has been increased . telescopic sections 1 a 1 , 1 a 2 and 1 a 3 each have slid rightward to their rightmost position . in fig5 torque arm 1 a has been compressed so that the overall length of torque arm 1 a has been decreased . section 1 a 1 has slid to the left inside section 1 a 2 . section 1 a 2 has slid to the left inside section 1 a 3 . section 1 a 3 has slid to the left inside main torque arm section 1 a 4 . it should be noted that because torque arms 1 a and 1 b are telescopic that they will lengthen and shorten according to the movement of the user allowing full range of motion . also , telescopic torque arms 1 a and 1 b will adjust automatically to the user &# 39 ; s height . fig1 a , 1 b and 1 c show a preferred tension - adjustable body - mounted shaft housing unit 3 . shaft housing unit 3 includes casing 3 a and back support piece 3 b . fig1 d shows a side view of casing 3 a . in a preferred embodiment , a hole is drilled through the side of shaft housing 3 . spacer tube 10 is then welded into the hole . shaft 4 is then extended through spacer tube 10 . preferably , shaft housing unit 3 is sewn into adjustable belt 45 ( fig1 a ). also , preferably , back support piece includes cushion pad 111 ( fig1 ). back support piece 3 b provides support for the user &# 39 ; s upper and lower back . preferably , knob 5 b is locked to shaft 4 via a pin ( fig1 c ). thrust bearing 1 b is adjacent knob 5 b . a plurality of belleville disc springs are arranged in series adjacent thrust bearing 11 b to form belleville disc spring column 12 b . washer 13 b is adjacent belleville disc spring column 12 b . torque arm 1 b is adjacent washer 13 b . washer 15 b is between torque arm 1 b and spacer tube 10 . on the opposite side of spacer tube 10 , washer 15 a is between torque arm 1 a and spacer tube 10 . washer 13 a is between torque arm 1 a and belleville disc spring column 12 a . thrust bearing 11 a is between knob 5 a and belleville disc spring column 12 a . knob 5 a is threaded onto shaft 4 . load indicator device 16 is locked to shaft 4 via pin 17 ( fig8 ) adjacent knob 5 a . leg mounts 35 a and 35 b are preferably sewn into knee mounts 2 a and 2 b , respectively ( fig1 a ). as shown in fig1 b , leg mounts 35 a and 35 b are preferably pivotally connected to torque arms 1 a and 1 b . also as shown in fig1 b , leg mounts 35 a and 35 b include hard surface sections 35 c and 35 d , respectively . hard surface sections 35 c and 35 d act as a hard surface to stabilize torque arms 1 a and 1 b and to prevent connector sections 35 e and 35 f from digging into the user &# 39 ; s legs . knee mounts 2 a and 2 b ( fig1 a ) each include two straps . one of the straps wraps around the knee below the knee cap and the other strap wraps around above the knee cap . the straps function to prevent knee mounts 2 a and 2 b and torque arms 1 a and 1 b from moving or sliding up or down the legs from moving or sliding sideways . fig6 - 9 show the operation of load indicator device 16 . fig8 shows load indicator device 16 pinned to shaft 4 via pin 17 . knob 5 a is threaded onto shaft 4 and has a cutout section to accommodate load indicator device 16 . fig9 shows a detailed side view of load indicator device 16 . preferably , load indicator device 16 is color - coded to indicate the amount of compressive force exerted onto torque arms 1 a and 1 b as knob 5 a is adjusted . in a preferred embodiment , “ green ” indicates light compressive force , “ blue ” indicates medium compressive force , “ yellow ” indicates high compressive force , and “ red ” indicates very high compressive force . the greater the compressive force exerted onto torque arms 1 a and 1 b , the more difficult it is for the user to generate enough torque to overcome the compressive force and to move his legs forward and backward in a walking or running motion . in fig6 , knob 5 a has been turned counterclockwise so that load indicator 16 is covered by knob 5 a . this indicates to the user that knob 5 a is positioned so that there is essentially no compressive force being exerted onto torque arms 1 a and 1 b . it is therefore very easy for the user to move his legs . in fig7 , the user has turned knob 5 a clockwise so that load indicating device 16 shows “ red ” ( fig9 ). belleville disc spring columns 12 a and 12 b have been compressed and very high compressive forces are being exerted on torque arms 1 a and 1 b . it will therefore challenge the user &# 39 ; s ability to a higher level . fig2 a - 2d describe a sequence of events showing the utilization of a first preferred embodiment of the present invention . in fig2 a - 2d the user is exercising while walking . the user is also gaining additional exercise by pulling handles 6 a and 6 b to stretch cords 7 a and 7 b . prior to beginning his exercise , the user has tightened knob 5 a so that medium compressive forces are being exerted on torque arms 1 a and 1 b ( see above discussion ). therefore , the user will have to generate an increased amount of torque to pivot torque arms 1 a and 1 b clockwise and counterclockwise around shaft 4 . in fig2 a , the user has stepped forward with his right foot . this has caused torque arm 1 a to pivot counterclockwise about shaft 4 . the momentum of the user stepping forward with his right foot has caused the user &# 39 ; s upper body to move forward in relation to his left foot . this motion has caused torque arm 1 b to pivot clockwise about shaft 4 . also , in fig2 a the user has raised his left hand and has pulled cord 7 b tight . in fig2 b the user has planted his right foot on the ground and has begun to step forward with his left foot . the user &# 39 ; s upper body is positioned approximately over the user &# 39 ; s right foot . torque arm 1 a has pivoted clockwise about shaft 4 and torque arm 1 b has pivoted counterclockwise about shaft 4 . the user has lowered his left arm . in fig2 c , the user has stepped forward with his left foot . this has caused torque arm 1 b to pivot further counterclockwise about shaft 4 . the momentum of the user stepping forward with his right foot has caused the user &# 39 ; s upper body to move forward in relation to his left foot . this motion has caused torque arm 1 a to pivot further clockwise about shaft 4 . also , in fig2 c the user has raised his right hand and has pulled cord 7 a tight . in fig2 d the user has planted his left foot on the ground and has begun to step forward with his right foot . the user &# 39 ; s upper body is positioned approximately over the user &# 39 ; s left foot . torque arm 1 b has pivoted clockwise about shaft 4 and torque arm 1 a has pivoted counterclockwise about shaft 4 . the user has lowered his right arm . in this fashion the sequence shown in fig2 a - 2d is repeated . as explained above the user can tighten knob 5 a to increase the resistance or loosen knob 5 a to decrease the resistance . fig2 a - 2d describe just one manner in which the present invention may be used . it can also be used in a variety of other manners . for example , fig1 shows a user running while utilizing the present invention . because he is running the user &# 39 ; s stride is greater than it is while he is walking ( fig2 a - 2d ). therefore , the amount torque arms 1 a and 1 b have pivoted is also greater . the difference can be seen by comparing the positions of torque arms 1 a and 1 b in fig1 to their positions in fig2 a and 2c . a top view of preferred handle rods 8 a and 8 b is shown in fig1 and 12 . in a preferred embodiment , a hole is drilled into the side of shaft housing unit 3 to accommodate hollow support tube 20 ( fig1 d ). support tube 20 is then welded to shaft housing unit 3 . support tube 20 preferably includes slots 21 a and 21 b for receiving spring loaded pins 22 a and 22 b of handle rods 8 a and 8 b , respectively . rods 8 a and 8 b slide horizontally in and out of shaft housing unit 3 and automatically adjust according to the user &# 39 ; s shoulder width . in fig1 the user has slid handle rod 8 a to its leftmost position and has slid handle rod 8 b to its rightmost position . spring loaded pins 22 a and 22 b prevent the user from sliding rods 8 a and 8 b completely out of support tube 20 . the positions of rods 8 a and 8 b shown in fig1 are preferable for a user with extremely broad shoulders . in fig1 the user has slid handle rod 8 a to its rightmost position and has slid handle rod 8 b to its leftmost position . spring loaded pins 22 a and 22 b prevent the user from sliding rods 8 a and 8 b so far that they collide with each other . the positions of rods 8 a and 8 b shown in fig1 are preferable for a user with extremely narrow shoulders . for a user with shoulders of medium width , the user can slide rods 8 a and 8 b so that they are positioned approximately halfway between the positions shown in fig1 and 12 . the above discussion described in detail how knob 5 a is adjusted to vary the compressive force applied to torque arms 1 a and 1 b . fig1 shows another preferred knob 5 a 1 . knob 5 a 1 clicks as it is turned clockwise or counterclockwise by the user . the user can use the clicks to help precisely adjust the compressive force on torque arms 1 a and 1 b . for example , on tuesday the user may have exercised for 30 minutes with knob 5 a 1 turned clockwise 9 clicks . on thursday , the user wants to slightly increase the resistance . therefore , he will turn knob 5 a 1 clockwise 10 clicks . fig1 shows a perspective view of knob 5 a 1 . knob 5 a 1 includes multiple wedges 25 . fig1 a shows a side view of knob 5 a 1 threaded onto d - shaft 4 a . washer 26 is slid onto d - shaft 4 adjacent to knob 5 a 1 . d - shaft 4 a includes spring 27 . in fig1 b the user has begun to turn knob 5 a 1 slightly clockwise . a wedge 25 has come into contact with spring 27 . in fig1 c the user has turned knob 5 a 1 more so that spring 27 snaps back and collides into an adjacent wedge 25 . the snapping back and collision with the adjacent wedge creates an audible click that the user can rely upon to gage how much he has turned knob 5 a 1 . in fig1 c load indicating device 16 has been threaded onto d - shaft 4 a . by utilizing the device shown in fig1 c the user can both visually gage how far he has turned knob 5 a 1 by looking at load indicating device 16 ( fig9 ) and he also audibly gage how far he has turned knob 5 a 1 by listening to clicks ( fig1 a - 14c ). in the preferred embodiment shown in fig3 a and 3b , torque arms 30 a and 30 b are bent at upper sections 31 a and 31 b , respectively . by utilizing bent torque arms , the user is able to achieve greater lateral movement with his legs . for example , in fig3 b the user has raised his right leg . because there is a bend at upper sections 31 a and 31 b , the user can raise his leg laterally and torque arms 30 a and 30 b will not bump into each other . the present invention provides numerous benefits . some of these are listed below . for example , users of the invention will experience an increased oxygen consumption rate while utilizing the invention . the greater the amount of oxygen consumed during a cardio workout , the shorter the required duration of the workout . also , the present invention will improve the user &# 39 ; s cardio system , his muscle strength and his flexibility . the user will become more limber due to the large range of motion achievable . the adjustable knob will allow the user to control and vary the resistance workload . the present invention is easy to use , portable , lightweight , easy to store and affordable . a tall person , a short person , an overweight person or a slim person can all use and gain benefits from the present invention . the waist mount will support the upper and lower back . the adjustable belt will fit any waist size . the knee mounts will support the knees and provides an additional level of support . the present invention creates a fitness device which will stimulate the muscles while the user is engaged in an aerobic activity such as walking , running or jogging . the user can exercise indoors or outdoors . also , the user can exercise a large number of muscle groups with a very low equipment expense and without wasting unnecessary time . fig1 a - 18c show another preferred embodiment that utilizes swivel belt 140 . swivel belt 140 is pivotally connected to buttons 142 . buttons 142 are both rigidly connected to back support piece 3 b of shaft housing unit 3 . swivel belt 140 can pivot up or down depending on the wishes of the user . for example , if the user has a large stomach , he may want swivel belt 140 to pivot downwards as shown in fig1 c . conversely , if he has an injury , he may want swivel belt 140 to pivot upwards as shown in fig1 b . although the above - preferred embodiments have been described with specificity , persons skilled in this art will recognize that many changes to the specific embodiments disclosed above could be made without departing from the spirit of the invention . for example , it was described above how torque arms 1 a and 1 b are preferably pivotally connected to leg mounts 35 a and 35 b . it should be recognized that there are a variety of ways in which to connect the torque arms to the leg mounts . for example , fig1 a and 16b show that torque arms 51 a can be connected to leg mounts 50 via a ball and socket joint . this manner of connection allows for greater mobility of the legs in various directions . also , even though the above preferred embodiments described how belleville springs were utilized to vary the compression on torque arms 1 a and 1 b , it should be understood that a variety of springs could be used in stead of belleville springs . for example , a coil spring could be utilized as well . also , although the above description given in fig2 a - 2d show the user pulling on handles 6 a and 6 b , it is possible to utilize the present invention without attaching handles . for example , fig1 shows a user running without holding handles . therefore , the attached claims and their legal equivalents should determine the scope of the invention .
a personal exercise device having a body mounted shaft housing for mounting a shaft at a position near the rear portion of a user &# 39 ; s waist . a shaft is confined within the shaft housing . two leg mounts are attached to each of two legs of the user near the user &# 39 ; s knees . each of two torque arms are attached pivotally at one end to one of the leg mounts and also attached pivotally at the other end to the shaft . a torque adjustment device is also included and is for adjusting the torque required to produce pivot motion of the torque arms about the shaft . also , a preferred embodiment includes two handles are connected to the body mounted housing unit via two flexible cords . the user preferably gains cardiovascular training utilizing the device while walking or running and gains additional resistance training by appropriately adjusting the torque and pulling the handles .