Abstract: An exerciser includes a pair of frames each having a curved bottom surface for engaging with a supporting surface and for conducting swinging operations. A seat is secured between the frames for supporting a user and for elevating the user when the frames are swung relative to the supporting surface, against the weight of the users. A foot rest is resiliently coupled to the frames with one or more resilient members, for allowing users to move the foot rest away from the frames against the spring members, in order to exercise the lower muscle groups.

Abstract: An exercise apparatus for strengthening a person's muscles when the person is in contact with an apparatus part for support of the person's buttocks and/or back and/or stomach/chest. One apparatus part, for example, a support board for the person's back and/or buttocks is made having positional instability in connection with a support bearing.

Abstract: A multimode exerciser for muscles and muscle-groups stretch exercises has three horizontal platforms disposed along a horizontal rigid frame or bar elevated above ground. One platform near one end of the frame serves as a seat, while another platform near the foot-end services as a foot/ankle rest. An intermediate platform serves also as a foot rest for certain, different, exercises other than those using the foot-end rest.

Abstract: An abdominal exercise device comprising a frame, a seat support fixed to said frame, a back support pivotally connected to the frame near the seat support and being dispose at a negative incline during a portion of its use, and one or more handlebars pivotally mounted to the frame and in operational contact with the rear surface of the back support for causing the back support to pivot away from the negative incline if desired by a user during the exercise.

Abstract: A method of exercise and especially for strengthening and toning the abdominal muscles using a flexible elongated device to increase resistance. The device is held at its ends by the hands with the arms in an outstretched position while a person sits with legs bent. The person places the device across and near the near the knees and crunches the abdominals against the added resistance of the flexible elongated device.

Abstract: The present invention consists of a flat, rectangular metal frame that would measure approximately 5 feet long. The front of the frame would be fitted with a pair of handles or handgrips that would be connected on top of the padded elbow. The padded elbow and knee rests would roll back and forth along the frame. The knee rest would include a variable resistance mechanism that could be adjusted to make it harder to move the knee rest. The user would place the machine on the floor, kneel down on the knee rest, lean forward on their elbows and hold the handgrips with their elbows on the elbow rest, and exercise by using his abdominal muscles to move the elbow and knee rests back and forth along the frame. As the user pulls the knee rest up toward the handgrips, his abdominal muscles would contract and receive a good workout.

Abstract: The invention is designed to enable the user to perform both abdominal strengthening and back muscle strengthening exercises on the top of a conventional bed. A conventional bed is defined as one with a semi-rigid mattress and a rigid frame.

Abstract: An exercise device has a seat pivotally coupled to at least one rocker. A forward support member extends from the seat and has a roller mounted proximate to a forward end thereof. The user sits on the seat and rocks forward and/or backward to exercise muscles of the torso and lower body.

Abstract: The present invention relates to the field of abdominal exercise with the operator using the sit-up or crunch movements. More particularly, the present invention relates to an exercise apparatus that exercises the abdominal and back muscles with the lower torso of the operator supported by a moving seat while the upper torso of the operator is supported by a moving seatback. Continuous support of the lower back prevents back strain. The articulation of the seatback is coordinated with the movement of the seat. Means to adjust the rate of movement of the seat relative to the seatback are provided. Handles are provided such that the arm muscles can assist the sit-up or crunch movements.

Abstract: A weight stack exercise unit particularly for working on one's waist, abdomen and legs comprised of a frame that can be folded up for storage or shipment and expanded holding onto ground to support the unit; a handlebar each being provided on both sides and a lever laterally provided in the center of the frame; the lever pivoted to a rotary turntable; a circular track formed on the turntable to engage with a pulley beneath the seat; a lateral bar extending from front of the seat; a foot support each provided to the utmost front of the lateral bar; two weighted sections on both sides of the handlebar; the user sitting or lying on the seat to hold the handlebar with feet in both foot supports applying force to cause the lateral bar and the seat to swivel up and down, or to swivel laterally by releasing the seat for it to slide along a circular track on turntable and by changing loads of the weights depending on the individual user and the length of the training session.

Abstract: A swinging rack structure for sit-up machines includes a pair of lower bar brackets and an upper bar bracket. The upper bar bracket has one end fastening to an axle to pivotally couple with the lower bar brackets in the axial direction or normal to the axial direction and another end releasably anchoring on the lower bar brackets. When an user wants to get up, the upper bar bracket may be released on one side and turned about the axle to form an open condition so that the user may get up conveniently without interference.

Abstract: The present invention provides and exercise device and methods designed to assist the exerciser in all abdominal strengthening exercises by use of an adjustable resilient means to provide resistance and absorb impact for the exerciser's eccentric range of motion, while supporting or boosting exerciser's concentric range of motion. This device offers maximum support for the exerciser's hips and back through the full range of abdominal exercises. The device includes a seat member and back member pivotally connected so that the seat and back provide a horizontal platform for the exerciser's use in a full range of abdominal exercise. When the preferred embodiment is not in use, the back member and seat member fold together for ease of storage or portability. A second embodiment offers the advanced exerciser adjustable foot positioning and back member positioning and is supported by an external frame assembly.

Abstract: An exercise apparatus that will exercise at least five groups of muscles is disclosed. The exercise apparatus exercises the abdominal muscles, the serratus muscles, the intercostals muscles and the leg muscles. The apparatus uses a seated position for the person exercising and the exerciser is seated on a swing. When the exerciser contracts his or her abdominal muscles while lifting the legs, the swing rotates such that the exerciser's feet rotate upward. When the exerciser releases tension on the abdominal muscles, the apparatus goes back to its original position. When the exerciser bends forward, the above four groups of muscles are exercised.

Abstract: A compact portable abdominal exercise apparatus comprising a first member that concentrically slides in a second member, and resistance is provided by elastic attached between the distal end of the first member and the distal end of the second member. Handles position the user in an ergonomically neutral position that requires a user to crunch straight downward for the first member to slide properly within the second member. The straight downward crunching motion requires flexion of the user's lower vertebra column, thereby isolating the abdominal muscles from the hip flexors and back muscles. Molded covers protect the user from moving parts associated with the connector assembly. The elastic members can be quickly changed by the user.

Abstract: A hip exerciser 10 comprises a base 20 and a rocker frame 30. The rocker frame 30 comprises at least a lever arm 31, at least a load arm 32 and at least a hub 33. The lever arm 31 includes a foot rest 311 at the end away from the hub 33; the load arm 32 includes a waist support 321 at the end away from the hub 33. The lever arm 31, the load arm 32 and the hub 33 functions like a seesaw. The base 20 includes a corresponding pivot bearing 21 to which the hub 33 is pivotally connected. When performing exercising movements, the user depress the foot rest 311 with his/her feet, which also lifts the waist support 321 simultaneously.

Abstract: A compliant body-pressing exerciser is adapted to be detachably coupled to a seat frame, and includes a bowl-shaped lower member and a dome-shaped upper member formed respectively with upper and lower surrounding edge portions that engage each other and adapted to contact the ground and compliantly press against a user's body. A height of the upper member is larger than that of the lower member. A shortest one of radial distances measured from a central point to the lower surrounding edge portion is not less than the height of the upper member so as to lower the gravity center of the exerciser.

Abstract: A therapeutic exercise device, including receptacle means designed to support a person's lower or upper extremities. A substantially rectangular support base (10) is slidably associated with the carriage (16), in such a manner as to allow a longitudinal displacement of the carriage on the support base. In addition an adjustable resistance arrangement is included to allow increased frictional resistance in between the carriage, and the support base Consequently with increased frictional resistance, increased muscular energy is required to achieve the longitudinal displacement of the carriage on the support base. Thus a more versatile therapeutic device is provided, that permits a simple and accurate measurement of the rehabilitation performance of the lower or upper extremity affected. This device may be employed for strengthening abdominal and back muscles in the process of physical therapy, especially in facilitating Mc Kinsey exercises for lower back.

Abstract: Exercise apparatus with a base plate, a pair of opposed flanges extending perpendicularly from the end and side of the base plate, each the flange having a an aperture that receives a pin that acts as a shaft, an inverted U shaped frame, the ends of the U shaped frame being connected to the shaft pins so that the U shaped frame can rotate about the shaft pins, a plurality of radially spaced apertures in each the flange, a single aperture in each said inverted U shaped frame that aligns with said radially spaced apertures, a pair of connecting pins to retain said inverted U shaped frame to said flanges in a fixed position with respect to said base plate, a foot retaining assembly slidibly mounted in a horizontal manner with respect to the base of said inverted U shaped frame, said foot retaining assembly comprised of a plurality of foot retaining bars attached at each end to a side plate, a pair of retaining pins that can fix said foot retaining assembly higher or lower along said inverted U shaped frame.

Abstract: An angle-adjustable rowing exerciser, which includes a wheeled base frame, a fixed mattress and a pivoted mattress supported on the base frame, a transverse frame bar pivotally mounted on the base frame at the bottom, two handlebars respectively adjustably connected to two adjustable ratchet connectors at the ends of the transverse frame bar for turning by hand to rotate the transverse frame bar, and two actuating bars perpendicularly and fixedly connected to the transverse frame bar and forced to tilt the base frame or the movable mattress up and down upon turning of the handlebars.

Abstract: An exercise device which includes a structure with a lower outwardly extending ground-engaging surface, an upper surface which includes a seat formation for a user positioned so that a user, seated on the seat formation, can place his feet on the ground, and an upwardly extending back-supporting surface.

Abstract: A medical appliance for assisting in the performance of exercises for regaining lost range of motion in a previously traumatized knee joint of the leg of a patient having a planar leg support with a first end and a second end, the leg support further having a cushion attached on the first end thereof, the cushion surrounding the first end of the planar support and being further adapted for fitment adjacent to and behind the knee joint to support and locate the lower leg for performance of exercises, and an elongate stretcher removably attachable to the to the leg support whereby the patient may apply force to the to the stretcher increasing the range of movement in the previously traumatized knee.

Abstract: An abdominal exercise device that allows the exerciser to do sit-up type exercises to stress the exerciser's abdominal muscles. The device has a frame assembly made of several members. A deformable seat for the exerciser is connected to frame assembly. The deformable seat is a fillable container. Footholds are positioned on the frame assembly to allow an exerciser to sit on the deformable seat and place the exerciser's feet in the footholds while performing an exercise. Additionally, there are handholds that an exerciser may hold so that an exerciser may stabilize himself while getting on and off the exercise device and during performance of exercise.

Abstract: An exercise apparatus for inverting a human body is disclosed to include a base, two support struts, and a body-inverting mechanism. The two support struts are correspondingly mounted on the base and extend upwardly and slightly forwardly from the base. A connecting strut interconnects top ends of the two support struts. The connecting strut is disposed with a main post at the middle section thereof. The two support struts and the connecting strut together form a U-frame, which leans slightly forwardly toward the base. The body-inverting mechanism includes a seat assembly and a leg engaging assembly and is pivotally mounted on said main post so as to pivot through a limited angle. The U-frame leans slightly forwardly such that a user can do a body rotation exercise forward and backward as well as leftward and rightward with little limitation.

Abstract: A portable exerciser for abdominal and gluteal exercise has a pivoting backrest with handgrips and a leg support extension which is alternately fixed or allowed to pivot for different exercises. The exerciser is easily disassembled and stored in very little space for later reassembly and use.

Abstract: Abstract A lower-body exercising device and method including a three-dimensional platform with a resilient means for providing a resistance-based workout while sitting at work, home or traveling is disclosed. Preferably, the invention is manufactured from a single piece of material, is designed to be wedge-like in shape, is compact in size so as to fit under a desk or table or airplane seat, and is constructed from polyurethane foam that provides resistance to a pushing force by the user during manipulation. The invention can be manipulated by pressing the soles of the feet alternately into the device, or together in a “pumping” motion. Optionally, the device is covered it in a plush, washable upholstery material, has textured s, and/or includes heating elements.

Abstract: An apparatus for supporting a weight on a supine person's abdomen for performing abdominal exercises, including a base and a platform removably resting on the base. The platform has at least one depression for receiving a curl barbell, a straight barbell, and/or dumbbells. Optionally, pegs may extend from the platform surface for maintaining the position of a stack of disc weights laid on top of the platform. Optionally, the platform under surface has resilient palm pads for the user to aid in stabilizing the apparatus while in use. The base has a curved underside with padding and rests on the user's abdomen. A unitary embodiment is a rigid plate. A two-part embodiment has a foundation with a tray and a pedestal that sits in the tray. Optionally, the curved wings extend from sides of the base down around the sides of the user's abdomen. Pins in holes position the platform on top of the base. Optionally, a removable latch secures the platform to the base.

Abstract: A hand-held abdominal muscle exercise device includes a substantially rigid handle assembly which has a pair of hand-grip portions that are held in a spaced, generally parallel position by a transversely extending cross-member. The exercise device is used by a person in performing twisting type abdominal exercises to maintain the person's upper body in proper exercise position relative to the person's lower body to effectively exercise abdominal muscles at the person's waist. The exercise device may include a fixed or pivoting abdominal support adapted to engage and be firmly pressed against the waist of the person during exercise to massage the user's abdominal muscles to provide enhanced blood flow and stimulation thereof.

Abstract: An abdominal exerciser device includes a self-standing casing that freely movably supports an exercising member such as a ball with an exposed surface protruding upward from the casing for contacting a user's body part. The device also includes a hollowed cover connecting to the casing to protect the exposed surface from outside environment when the device is unused, and a handgrip for hand-carrying the same. The device can include a carrier having an adjustment member mounted thereon to adjust position of the casing relative to the carrier.

Abstract: A fitness apparatus for chest expansion and tension pulling mainly includes an arcuate support board, two oscillating rod bodies and one or more than one elastic bodies, wherein the central area on the external portion of the arcuate support board is soldered with an axle seat provided for pivotally conjoining two rotary pivot housings at the rear ends of the two oscillating rod bodies; two cotters respectively and pivotally position the two oscillating rod bodies onto the axle seat. The front end of the oscillating rod body is a grip rod while the middle rear segment thereof is disposed with a bush for housing one or more than one elastic bodies. When in operation, the arcuate support board pushes against and positions at the user's abdominal portion providing a stable point for force exertion. Therefore, the two oscillating rod bodies elastically expand and close in a smooth operation to avoid sport injury and sway so as to increase stability and correctly implement tension.

Abstract: The rotary tilt exercise machine is a gravity-controlled device wherein the user, cradled in a body support unit, employs bodily balance and thrust to roll the body support unit, which is tiltably mounted on the ball joint of a housing drum. A pendular shaft is fixed to the base of the body support unit so that body support unit tilt produces angular displacement of the shaft within the housing. At its extension, the pendular shaft is weighted to provide ballast and centrifugal impetus to body support unit roll. Body support unit motion parameters are defined by either of two optional control devices, specified as a rotary wheel motion controller and as a crank arm motion controller. Auxiliary equipment includes a seat belt and grab bars mounted on the body support unit that stabilize the torso and enable body balance movements that work the back and abdominal muscles.

Abstract: An abdominal exercise device (10) includes a first (11) and second (12) fluid impermeable, opposed sheets that are sealed along an outline seal (31) to define a selectively inflatable chamber (13, 16, 19) therebetween. A first (33) and second (36) strap are each connected to one of the first (11) and second (12) sheets. A plurality of hand holds (37, 40, 43, 55, 58, 60) are formed along the first and second straps (33, 36) at predetermined varying distances from the chamber (13, 16, 19). To use this device (10), the chamber (13, 16, 19) is placed under the user's head in contact with the neck and upper back and supporting the same. One of the user's hands holds on the first strap. The first strap (33) and second strap (36) are pulled sufficiently to support the user's head, neck and upper back.

Abstract: A training device for acquiring the correct hand motion associated with the different types of sport and for strengthening the wrist and forearm. The device is simple and portable. It utilizes a combination of a magnet and a plunger, the magnet having a sufficient force to keep the plunger attached but not strong enough to prevent the plunger from dislodging from the magnet when a user snaps the device. The device is designed so that the snapping sound caused by the plunger hitting a wall synchronizes with the impact on the muscles felt by the user during a hand motion.

Abstract: The present invention relates to the field of pull/push exercise with an exercise machine that exercises the abdominal, back and leg muscles with the operator recumbent in the face upwards position. Foot contacts follow an arcuate curve path positioned above the recumbent operator. Resistance is provided for each foot contact where the abdominal muscles of the operator pull the lower leg contact towards the operator. Handles are provided to support the arms of the operator. A situp assist device can be used in conjunction with leg pull to exercise the upper abdominals. A leg curl feature is added to the apparatus to allow leg curls. Weight stack resistance is also available.

Abstract: The exercise device uses three main components to provide a simplified abdominal exercise for the user. A base frame relaeasably supports two pivoting body support structures. The body support structures are pivotally secured to the frame at intermediate points in the length of the body support structures. The base frame is preferably collapsible to simplify securement and storage. Each body support structure is independently secured to the base frame. The user is able to perform exercises according to his own requirements merely by modifying the extent of movement of the body support structures.

Abstract: A therapeutic back stretching device that stretches and relaxes the muscles in the lumbar section of the spine as well as concomitant muscles, such as the abdominal muscles. The device includes a rigid base constructed from a strong rigid lightweight plastic material. The base has two opposed ends with a plurality of spaced parallel slots between which is selectively fit an arched insert. The insert being formed from a lightweight flexible material and includes an opening in the center thereof to accommodate the spine of a user. The insert can be fit between slots closer or further apart to vary the degree of curvature.

Abstract: Exercise apparatus with a base plate, a pair of opposed flanges extending perpendicularly from the end and side of the base plate, each the flange having a an aperture that receives a pin that acts as a shaft, an inverted U shaped frame, the ends of the U shaped frame being connected to the shaft pins so that the U shaped frame can rotate about the shaft pins, a plurality of radially spaced apertures in each the flange, a single aperture in each said inverted U shaped frame that aligns with said radially spaced apertures, a pair of connecting pins to retain said inverted U shaped frame to said flanges in a fixed position with respect to said base plate, a foot retaining assembly slidibly mounted in a horizontal manner with respect to the base of said inverted U shaped frame, said foot retaining assembly comprised of a plurality of foot retaining bars attached at each end to a side plate, a pair of retaining pins that can fix said foot retaining assembly higher or lower along said inverted U shaped frame.

Abstract: An inventive exercise device is disclosed for facilitating the strengthening of abdominal and back muscles, and includes a resistance member coupled between a lap engageable base and an arm positioning member. The arm positioning member helps to maintain the back of the user in a substantially upright position as the arm positioning member applies and releases reciprocatively and alternatingly in a substantially vertical path of travel of the upper body of the user against the force on the resistance member during repetitions of use of the device. The resistance member resists substantially vertical downward movement relative to the base member to enhance the development of muscle strength by enabling the upper body of the user to contract and expand reciprocatively vertically without leaning forwardly in a safe and effective manner.

Abstract: In one preferred embodiment, first and second platforms are respectively provided for supporting a user's arms and knees. Rollers on the bottom surface of at least one of the units facilitate relative movements between the units. A detent may extend from the unit receiving the user's legs to retain the user's calves or ankles on the unit. An elastic cord separable from at least one of the units may extend between the units to provide for a controlled relative movement between the units and to facilitate a collapse of the unit into suitcase size. In another preferred embodiment, a pair of units having straps for grasping by the units hands are provided, one for each of the user's arms. Each unit is rotatable and/or movable linearly on a support surface in any direction independently of the other.

Abstract: A compact portable abdominal exercise apparatus comprising a first member that concentrically slides in a second member, and resistance is provided by elastic attached between the distal end of the first member and the distal end of the second member. Handles position the user in an ergonomically neutral position that requires a user to crunch straight downward for the first member to slide properly within the second member. The straight downward crunching motion requires flexion of the user's lower vertebra column, thereby isolating the abdominal muscles from the hip flexors and back muscles. Molded covers protect the user from moving parts associated with the connector assembly. The elastic members can be quickly changed by the user.

Abstract: A home exercise device is of greater value when it is capable of multiple functions and can be easily stored when not in use. Lightweight springs are used in place of heavy weight plates to reduce shipping costs and simplify storage. The device also includes a frame that supports a base, providing linear movement of the base relative to the frame. A bar, with spring tension, is coupled to a multi-position lock. This allows the bar to be positioned in a variety of locations relative to the frame and the user, thereby providing a variety of exercises. A head portion is also provided that includes a torsion spring. This spring can be engaged or disengaged from the frame to allow the user to provide spring tension to resist movement of the head portion. The diversity of movable components offers a vast variety of exercises that can be performed on the unit as well as enabling the unit to fold down for storage when not in use.

Abstract: A composite body building exerciser at least comprises a frame for supporting a seat, a seat back, and two side parallel tubes in similar size with two back-bent push bar to be held by hands; two connecting rods linked with the ground wheels; and a front leg with rubber shoe disposed in the direct opposite of the ground wheel; The front end of the frame receives a retractable pedal assembly. By dint of an elastic element mounted between the connecting rod and the frame, when a force is applied to the push bar, the seat back and the pedal assembly, the elastic element is therefore stretched, and the body building exerciser will produce a relative push and pull actions effected on the body.

Abstract: A belly exerciser has a pressing board, a shaft, a main body, a rotating disk, a bowl, a pair of connecting sleeves, and a pair of handle bars. The main body has an outer ring, and a main tube having a cross-shaped groove. The pressing board is disposed on the shaft. The shaft is inserted through the main tube. A compression spring is disposed between the pressing board and the outer ring to surround the shaft. A connecting rod is connected to the shaft. A connector is connected to an end of the connecting rod. A post is disposed on the connecting rod. The bowl is disposed on the connector. The rotating disk has an annular center flange to engage with the bowl. The connecting sleeves are disposed on the outer ring to receive the handle bars.

Abstract: An exercise device allowing a user to exercise his abdominal region by lying on his back while extending his arms generally upwards is disclosed. The device has a hand-gripping member positioned generally above the user's head for the user to grip while exercising. The hand-gripping member allows for a wide range of motion which may include side-to-side, front-to-back, diagonal, and/or rotational motion. This enables the user can exercise his abdominal region by moving in a variety of different directions, while keeping his arms extended.

Abstract: An exercising device includes a tube, two wheel frames, a rod, and a housing. The tube has an inner wall provided with an elastic member, and the rod is extended into the tube to compress the elastic member. Thus, the exercising device may be used to exercise the muscles of the user's arms, chest and abdomen, thereby providing multiple exercising functions.

Abstract: An abdominal exerciser, comprising: a base frame; a seat having a seat pad which is secured on the base frame; an upper arm having a first end and a second end; a lower arm having a first end and a second end, the first end of the lower arm connecting on and laterally extending from the base frame, the second end of the lower arm pivotally connecting to the first end of the upper arm; a vertical bar being located behind the seat pad and connecting with the second end of the upper arm, the vertical bar having a first end and a second end; a handle pivotally connecting to the first end of the vertical bar; and a resilient mechanism interconnecting the base frame and the second end of the vertical bar.

Abstract: An abdominal exerciser, comprising: a base frame; a seat having a seat pad which is secured on the base frame; an upper arm having a first end and a second end; a lower arm having a first end and a second end, the first end of the lower arm connecting on and laterally extending from the base frame, the second end of the lower arm pivotally connecting to the first end of the upper arm; a vertical bar being located behind the seat pad and connecting with the second end of the upper arm, the vertical bar having a first end and a second end; a handle pivotally connecting to the first end of the vertical bar; and a resilient mechanism interconnecting the base frame and the second end of the vertical bar.

Abstract: A bodybuilding exerciser for laterally swinging a user's waist and lower limbs includes an upper level having a supporting beam, to an upper side of which a backrest and a round waist and buttocks rest are fixedly and freely rotatably mounted, respectively; a lower level having a pivot shaft, to which the supporting beam is pivotally turnably connected; and driving means for laterally swinging the supporting beam and accordingly the backrest and the waist and buttocks rest.

Abstract: An abdominal exercise device is disclosed to facilitate exercise of the abdominal muscles. The device is comprised of a harness that stabilizes the exercisers hands and feet allowing for total control while contracting the abdominal muscles. The said device consist of two straps that extend parallel beneath the exercisers frame. The two parallel straps are secured by cross straps. The user places the said device on a flat surface. The user sits down and secures feet in the adjustable openings at the lower end and hands in the grips at the opposite end. The user then pulls the straps over their shoulders and is positioned for the exercise. The user then raises the upper body in a “crunch” type exercise. The straps provide resistance to the abdomen and provides support to the users frame when performing an abdominal exercise.

Abstract: An exercise device is constructed and arranged to be used by a user to perform multiple exercises, which exercises utilize the user's weight as resistance. The exercise device comprises a pair of manually movable structures including U-shaped rocker elements having downwardly facing convex surfaces constructed and arranged to be supported on a horizontal surface. The pair of movable structures include a pair of hand grips which are to be moved by the user when supported by a user support structure connected between the pair of movable structures. Movement of the hand grips moves the user support structure disposed adjacent the horizontal surface upwardly from the horizontal surface enabling the user to resist such movement and manually resist a return movement by the supported weight of the user on the user support structure.

Abstract: An abdominal exercise device includes a collapsible support frame having first and second legs pivotally associated with one another. Non-rotating handles extend from the support frame. A seat is pivotally attached to the support frame between the handles. A bar of adjustable length extends from the seat to a foot rest. A cross-bar is attached to the support frame for limiting backward rotation of the seat, and thus the bar and foot rest. Abdominal muscles are exercised as the user repeatedly pivots the seat backwards and forward.