Abstract: An abdominal muscle exercise machine that generally contains a diagonal member with an adjustable seat and a backrest and a pivot member that pivots with respect to the diagonal member. A chest push can be mechanically coupled to the pivot member through an adjustable force multiplier. An optional counterweight can be placed near one end of the pivot member to lighten the force, or an optional load weight can be placed near the other end of the pivot member to increase the force. The pivot member can be constructed to telescope or otherwise adjust for different body sizes. The machine provides a smooth exercise where the top and bottom portions of the body move together in a linked fashion. The machine of the present invention works without heavy external weights.

Abstract: A rope climbing apparatus (15) comprising a frame (16), a seat (18) supported by the frame and adapted to move relative to the frame from a first position (19) to an elevated second position (20), a lower pulley assembly (21) connected to the seat, an upper pulley assembly (22) connected to the frame, a rope (23) extending between the lower pulley assembly and the upper pulley assembly and having a rope climbing portion (24) graspable by a user (25) when the user is seated on the seat, and the rope, the seat, the lower pulley assembly and the upper pulley assembly configured and arranged such that a downward force (26) on the rope climbing portion of the rope causes an upward force (28) on the seat. The downward force on the rope climbing portion may result in an upward force on the seat at a mechanical advantage provided by the lower pulley assembly and the upper pulley assembly, and the mechanical advantage may be four.

Abstract: An exerciser including a movable body support mounted on an exerciser frame for movement along tracks provided by the frame. A movable foot support extends from the exerciser frame. The movable foot support is adapted to be engaged by the user's feet to absorb the energy of movement in a first direction and to provide the user with a bouncing movement, which the user may translate into a movement of the movable body support in the opposite direction. The movable foot support may be provided as an attachment and retrofitted to existing exercisers. The exerciser may include a resilient resistance system coupled to the movable body support and a set of pull lines with user grips trained over pulleys carried by the exerciser frame. Also disclosed are methods for enabling users to exercise.

Abstract: A portable, adjustable apparatus for stretching the muscles of the lower body, in particular, the hip flexor and thigh muscles, comprised of a back support, a flexible line, a knee cradle attached to the mid-portion of the flexible line, and a line tensioning device which receives the free end of the line. The line-tensioning device allows a user to perform flexed-knee stretches such as the knee-to-chest stretch without having to manually hold the knee in the stretched position. The position of the back support and line-tensioning device relative to the knee cradle allows the knee to be drawn directly back towards the chest to optimally stretch the hip flexor and thigh muscles.

Abstract: An exercise machine has a main frame and a user support frame pivotally mounted relative to the main frame for rotation about a user support pivot axis between start and end positions. The user support frame has at least a primary support and a secondary support for supporting spaced positions on a user's body throughout an exercise movement. The user support pivot axis is spaced below at least one of the supports in at least one of the exercise start and end positions. A user engagement device is movably mounted relative to the frames for engagement by the user in performing exercises, and a multiple part connecting linkage translates movement of the user engagement device to rotational movement of the user support frame. A load resists movement of at least one of the user support, user engagement device, and connecting linkage.

Abstract: An apparatus for exercising a joint, the apparatus includes a movable platform for supporting a portion of a patient's body including the joint, and a manually-powered system for moving at least a portion of the platform to flex the joint, wherein the patient selectively operates the manually-powered system to control the flexing of the joint.

Abstract: An exercise device having many advantageous features is described, including the ability to provide a combination of grips to the user, and the ability to easily mount the device to a wall. One exercise device described is an inelastic resistance device having a combination grip that includes hand grips and a loop. The hand grip and loop may be used as a foot grip, or alternatively, just the hand grip can be used by the hand. The selection of a specific accessory grip allows the user to exercise by specific body parts and provides for a greater number of possible exercises.

Abstract: An apparatus for removably mounting an exercise apparatus to a supporting structure such as a ladder-like structure. Various types of mounting apparatus with specially designed brackets having multiple interchangeable parts, attachments and accessories, are used to facilitate easy and quick mounting of several types of exercise apparatus to the supporting structure.

Abstract: An exercise apparatus comprises at least one upright joined to a cross bar provided with a limb support means. The limb support comprises an upright connecting cross bar of such a length that the cross bar is spaced from the floor sufficiently such that, in use, the legs of the user can rest on the cross bar when the user is positioned beneath the cross bar. The cross bar also being sufficiently spaced from the floor such that, in use, the limb support comprises a handgrip to enable a user to push down on the exercise apparatus so that the exercise apparatus supports at least some of the user's weight. The limb support comprises two outer concave regions that are relatively spaced along the longitudinal axis of the cross bar. The cross bar is provided with a third inner concave region in between the two outer concave regions.

Abstract: A training and/or exercise device and method for exercising muscle groups of the entire body is disclosed herein that is portable, easy to use, can work the muscles of the entire body, and does not have complicated integrating parts when in use. The device and method allows a free range of motion about a vertical axis without substantial resistance. The device allows a wide variety of movement using a single device, and particularly allows for balancing movements that are advantageous for strengthening the core. Further, the training device is particularly advantageous for use in a home gym and may be stored under a bed or within the overhead compartment of an airplane.

Abstract: An exercise machine has a main frame, a user support frame which supports a user in an exercise position, and a multiple pivot assembly pivotally mounting the user support frame for movement between a start position and an end position. The pivot assembly has multiple pivots which define a theoretical pivot axis of the user support pivotal movement and a vertical gravitational center line which extends through the theoretical pivot axis. The user support frame has at least a primary support and a secondary support for supporting spaced positions on a user's body throughout an exercise movement. A user engagement device is movably mounted relative to the frames for engagement by the user in performing exercises, and a multiple part connecting linkage translates movement of the user engagement device to rotational movement of the user support frame. A load resists movement of at least one of the user support, user engagement device, and connecting linkage.

Abstract: A method for using an adjustable exercise device is described that allows for performing a wide variety of different exercises. In one embodiment the exercise device includes an elongated member with ends for supporting a user by their hands, fingers, feet and/or legs, where the device is movably supportable by a structure. The method includes adjusting the distance between the ends, positioning the device relative to the structure, and exercising. The user may support a portion of their weight on the ground and a portion from the ends of the device, and exercise by moving their body with their body thus supported. In alternative embodiments, the device may be supported by a door, a pole, a tree or some other suitable structure.

Abstract: A dip stand intended for use as a home strength training machine to perform dips such as chest dips and tricep dips. The stand is made of rigid tubing formed as a continuous loop. The loop includes a pair of generally parallel base segments to be supported on a floor surface, each of the base segments having a first end and a second end; and a pair of arches extending upwardly from the base segments, one of the arches extending upwardly from the first ends of the base segments and the other of the arches extending upwardly from the second ends of the base segments. Each of the arches includes an upper generally horizontal grip segment.

Abstract: An upper body exercising assembly includes an upper body support with an elongated bar having a first end and a second end. Each of a pair of stanchions has bottom end and a top end. The bottom ends are attached to the bar. A pair of grips is provided. Each of the top ends of the stanchions has one of the grips attached thereto. A lower bottom support includes a post having an upper end and a lower end. A plate includes a top side and a bottom side and the bottom side is pivotally coupled to the upper end of the post to allow the top side to be selectively angled with respect to a horizontal plane. A person's feet are positionable on the lower bottom support while the person's hands are engaged with the upper body support to allow the person to perform dip or push-up exercises.

Abstract: The equipment is considered in paired aspect, one construction for each of the exerciser's hands. In one arrangement, a strapping loop for each is respectively run through both of two tunneled components—a handhold and tethering anchor. To use it, the anchor is positioned on the opposing side at the top of a closed door so as to become trapped in place against the door and its frame. The exerciser grabs the handhold and performs chin-ups or other body suspension exercises by pulling upward along the door's face. A hand bracing assembly is optionally included to cushion the hands from excessive pressure against the door. If desired, the operator may also temporarily adapt the assembly to pull-type exercises.

Abstract: An exercise machine for performing lat pull down exercises has a main frame having a user support pivot mount, a user support pivotally mounted on the user support pivot mount for supporting a user in a seated position, and an exercise arm having handles for gripping by a user movably mounted on the frame for movement between a start position located above the head of a user in a seated position on the user support and an end position lower than the start position and generally below the user's chin. A connecting linkage connects movement of the exercise arm to movement of the user support. A load resists movement of at least one of the moving parts of the machine. The combined motion of the user support frame and exercise arm substantially replicates the natural movement of the human body when performing a free bar chin up exercise.

Abstract: An exercise machine has a main frame with a pivot mount, a user support frame pivotally mounted on the pivot mount, the pivot mount defining a vertical, gravitational center line, an exercise arm movably mounted for engagement by the user in performing exercises, a connecting link linking movement of the exercise arm to movement of the user support frame, and a load for resisting movement of at least one of the moving parts. Movement of the user engagement device in an exercise movement simultaneously moves the user support frame between a start and an end position, the pivot mount being positioned at a predetermined location under the user support frame, such that portions of the combined weight of the user and user support frame are distributed on each side of the gravitational centerline throughout the entire exercise movement and only a portion of the combined weight passes through the gravitational centerline during the exercise movement.

Abstract: An exercise equipment apparatus for isolating lower back muscles. The apparatus or device comprises main tubular support posts, secondary tubular support posts, and support feet for providing the foundation of the device. Inner tubular extensions and setting pins are used to adjust the height and length of the device to accommodate the particular size and the proper positioning of the user for the angle of strengthening desired. A removeable torso support is releaseably attached or coupled to one of the main tubular support posts. An angular setting guide is used to select or set the desired angle of use and an articulating lever attached to the removeable torso support provides an arm for stopping or setting the removeable torso support at the selected angle of use by the user.

Abstract: A standing exercise device foldable between operative and storage positions includes a base on which a non-sitting user at least partially stands during a variety of pushing or pulling exercises. A lever is pivotally connected to the base and a mechanism providing adjustable resistance for pushing or pulling exercises connects the base and lever. A handle bar assembly is pivotally connected to and extends upwardly from the lever.

Abstract: An inferior limb muscle force training apparatus is provided with a supporting strut standing vertically, a seat body provided so as to be capable of ascending/descending along the supporting strut, and a weight balancing mechanism which applies a lift force to the seat body, wherein the seat body is provided with a saddle type seat portion and a pair of shoulder pads, and the weight balancing mechanism is constituted to be capable of adjusting a lift force applied to the seat body properly by winding ropes on pulleys provided on an upper portion of the supporting strut, linking one ends of the ropes to the seat body, and linking the other ends thereof to a weight placing stand provided on a back side of the supporting strut so as to be capable of ascending and descending.

Abstract: The present invention relates to an improved rowing exercise device includes one base, two rowing widgets, one driving widget, one footrest widget, one hoisting widget and one cushion. Making use of the driving widget to drive rowing widget, footrest widget and hoisting widget synchronously, operator, who sits on the cushion and stays on the hoisting widget, will be able to operate rowing handle to practice rowing action with hands and his feet will co-operate with the action of sway-forward and sway-backward of the footrest widget to practice stretching-and-bending exerting action at the same time; moreover, hoisting widget can load the operator's body up and down synchronously. By means of harmony-operation, not only the purpose of stretching and exercise hands, feet belly and thorax can be reached, but also improves the effect of reality and fun of rowing sport.

Abstract: A kind of exercise furniture includes a rocking frame and a recliner frame. The rocking frame has a rocking base. The recliner frame, which is supported by the rocking frame, includes a back support and a seat support mounted to the back support to define a recliner angle therebetween, wherein the recliner frame is adapted for primarily exercising a user's abdomen when the back support and the seat support are pivotally and repeatedly folded with the leg support to alter its inclined angle, so as to concurrently generate a rocking motion at the rocking base of the rocking frame.

Abstract: A floor standing exercise machine enables a user to perform an assisted back extension to exercise his lower back. The exercise machine contains: (a) a frame; (b) a stationary pad angled at about 30 to 60 degrees to the floor for supporting the user's lower body; (c) a footrest for supporting the user's feet; (d) a horizontal restraint bar for restraining the user's lower body against the stationary pad; (e) a pivoting pad connected to the top of the stationary pad, the pivoting pad being movable between a first position parallel to the stationary pad to a second position that is angled downward from the first position; (f) a means for providing a sufficient upward force to the pivoting pad to hold the pivoting pad in the first position when not in use; (g) a means for providing an adjustable upward force to the pivoting pad that partially offsets a downward gravitational force exerted by the user's upper torso.

Abstract: An apparatus for lower back exercise comprises a support structure and a body support platform supported by the support structure. A pendulum having three segments is connected to the support structure. The pendulum has a first segment; pivotably connected to the support structure; a second segment that proceeds from the first segment at a first angle; and a third segment that proceeds from the second segment at a second angle, so that the center of mass of the pendulum is offset from the vertical. Weights may be connected to the third segment of the pendulum. There is a means, such as straps, connected to the pendulum, for engaging the legs of a user. The user exerts force with his legs to move the pendulum through a range of motion greater than 90 degrees.

Abstract: A device for use with an exercise apparatus consisting of at least one hanging, length-adjustable and lockable rope (10, 11) which at its lower end has a gripping means (13, 14), e.g., a gripping loop. A vibration means (12; 16) is designed, when attached via a rope engaging member (8, 9) to a portion of such rope, to impart to the rope and thus its gripping means (13, 14) a vibratory motion.

Abstract: A multi-party, multi-purpose and collapsible fitness machine comprising an upper body workout unit, a leg curl/extension workout unit, a leg press workout unit and a cardiovascular workout unit with all the units being structured and combined to work cooperatively to enable three or more users to simultaneously exercise and strengthen various muscles of their bodies.

Abstract: An oscillated fitness bicycle structure includes a first driving apparatus and a second driving apparatus installed on a base, an eccentric portion on the first driving apparatus, a driving rod integrated to a handle support rod and disposed on a saddle support rod, a back-and-forth oscillation rod connected to the handle support rod and saddle support rod, and a resilient element for providing upward bounces anytime. When an exerciser sits on the saddle, the body weight of the exerciser pushes the saddle support rod downward and two driving rods drive a driving wheel of the first driving apparatus and a weight wheel of the second driving apparatus to rotate, such that the handle support rod and saddle support rod can perform leaping back-and-forth, up-and-down and sideway oscillations to provide an exercise similar to a horse riding exercise.

Abstract: An exercise machine has a main frame and a user support frame pivotally mounted relative to the main frame for rotation about a user support pivot axis between start and end positions. The user support frame has at least a primary support and a secondary support for supporting spaced positions on a user's body throughout an exercise movement. A user engagement device is movably mounted relative to the frames for engagement by the user in performing exercises, and an at least partially flexible connecting linkage translates movement of the user engagement device to rotational movement of the user support frame. The connecting linkage includes at least two axially spaced winding portions mounted for rotation about a common cam axis. A load resists movement of at least one of the user support, user engagement device, and connecting linkage.

Abstract: An apparatus for stretching at least the hamstring muscle of a user's leg is provided having a first support member for supporting the back of the leg of the user at or near the knee at least at the commencement of stretching and a second support member for engaging the back of the lower leg portion of the user during stretching. This first support member is disposed in front of the user during stretching of the hamstring muscle of the user's leg and the second support member is displaceable generally in a direction to stretch the hamstring muscle of the user's leg. An actuator operable by the user during use of the apparatus can be used for displacing at least the second support member generally in a direction to cause stretching of at least the hamstring muscle of the user's leg.

Abstract: An exercise machine for performing lat pull down exercises has a main frame having a user support pivot mount, a user support pivotally mounted on the user support pivot mount for supporting a user in a seated position, and an exercise arm having handles for gripping by a user movably mounted on the frame for movement between a start position located above the head of a user in a seated position on the user support and an end position lower than the start position and generally below the user's chin. A connecting linkage connects movement of the exercise arm to movement of the user support. A load resists movement of at least one of the moving parts of the machine. The combined motion of the user support frame and exercise arm substantially replicates the natural movement of the human body when performing a free bar chin up exercise.

Abstract: The subject invention provides an exercise machine for exercising the lower torso. As described herein, the exercise machine includes a stabilizer pad, which effectively immobilizes the user's lower body to maintain proper pelvic positioning during execution of the exercise. The stabilizer pad can be part of a user support structure having a seat surface, a pelvic stabilizer pad and a footrest. The footrest is positioned so the user can apply a force using the leg muscles to push the pelvis into the pelvic stabilization pad. The spatial arrangement of the stabilization assembly which comprises: pelvic stabilizer pad, seat, and footrest combination effectively immobilize the user's pelvic area, preventing it from rotating in either the anterior or posterior direction.

Abstract: This leg press exercise machine is comprised of a single movable foot-plate arranged to move up and down a vertical path for exercising one leg at a time. It is designed to be used in the standing position. A controlled weight resistance mechanism is connected to the movable foot-plate for providing adjustable resistance to movement. At least one hand rail is positioned to aid entry to and exit from the machine and to stabilize the user while exercising. A lumbar pad (or backrest) is positioned to provide counter stability while exercising. A selector lever arm is used to select a maximum range of movement of the foot-plate. This selector lever arm can also be used to help leverage-up the leg to a position from which it is about to start exercising. The foot-plate is dynamic on its horizontal axis to reduce stress on the exercising foot.

Abstract: A ball exerciser includes a deformable rolling body having an outer surrounding wall surface and at least one lateral mount wall, a rigid stationary coupling member secured to the lateral mount wall and having a stationary coupling end distal from the lateral mount wall, a movable coupling member having a movable coupling end disposed to be swivelable and frictionally rotatable relative to the stationary coupling end about a rolling axis, a grip including a grip segment which is spaced apart from the lateral mount wall and which is coupled to the movable coupling end so as to permit the grip segment to swivel with the movable coupling member.

Abstract: A combined exercise/weight bench/lower cable station device. The device includes a bench that is supported in a generally horizontal use position and that is pivoted so that it can be moved up to an upright stowed position and held in place in the stowed position. Also included is a cable riser with a cable running there through. The cable has a weight-carrying saddle coupled to one end, and the other end of the cable extends from the lower portion of the riser underneath the bench when the bench is in the user position. To use the lower cable station function of the device, the bench is pivoted up and out of the way to the stowed position to provide access to the user end of the cable. The weight-carrying saddle is adapted to carry one or more weight plates, dumbbells, or weighted balls, to allow the user to use existing weights.

Abstract: An exercise machine that allows an exercise similar to push-ups to be performed safely and has a base, a lever, a pad, a leveling rod, and a resilient element. The base has at least one bracket. The lever is attached pivotally to the bracket and has a front end, a rear end and a handlebar attached to the front end. The pad is attached to the rear end of the lever. The leveling rod is connected pivotally to the bracket and the pad. The resilient element is connected to the pad and the base.

Abstract: A safer, more user-friendly spring-balance single-rider teeter-totter includes manual adjustments for both the vertical position of the spring, which adjusts the rest height of the seat, and the horizontal position of the spring from the pivot, which adjusts the counterbalance resistance. A safety cover may be provided for the spring or other counterbalance mechanism.

Abstract: Exercise apparatus for resistance training has a pulley with a user-adjustable camming profile for changing the load curve.

Abstract: An exercise chair with a base frame with upright sides that support a pivoting backrest with a pivoting left arm and a pivoting right arm and a seat therein, with pivotally coupled leg members all that function sitting up or lying down. Each arm member has a reciprocating handle and each leg member has foot pegs. Resistance is provided to each member by being pivotally coupled to bidirectional resistance hydraulic cylinders. The rear side of the backrest has pivotally attached, laterally, telescoping arms, each supporting a floating pulley with a cable looped through it with one end of the cable connected to a system of pulleys with spring resistance, and the other end of the cable, having a handle that can be pulled by the users hands or extended to the feet.

Abstract: An exercise device for strengthening muscles used in horseback riding includes a handle and a base having opposed surfaces. An elongated arm has a joint between a first and a second section. The first section is affixed to the handle at an outer end, and the second section is affixed to the base at an outer end. The joint permits angular movement between the first and the second section in a plane generally parallel to planes defined by the base surfaces. The first and the second section are bendable between a first and a more-acute second angle. In use, a user lies substantially prone and grasps the handle, places one heel against each of the base surfaces, and draws the base toward his/her trunk using heel pressure, thereby bending the arm from the first angle to the second angle.

Abstract: An aspect of the invention involves a method of using a collapsible exercise device including providing a collapsible exercise device; positioning a first end of an adjustable incline at a desired height with respect to a vertical support member so that the adjustable incline is at a desired inclination; moving first and second combination pulley-support and pull-up bars to a desired position; moving first and second pulleys connected to the first and second combination pulley-support and pull-up bars to a desired location; and moving a support platform along the adjustable incline through cable movement through the first and second pulleys on the combination pulley-support and pull-up bars.

Abstract: An exercise apparatus comprises a frame having a base and an apex. A least one pivot is connected to the frame for supporting a swinging arm. The opposite end of the arm supports a seat for an exercising athlete, and optional weights. The frame supports a force plate opposed to the seat. The seat and the force plate are connected by elastic members, such as bands, that bias the seat toward the force plate. The athlete develops reversal strength by extending his legs to bound from the force plate, then stopping the resulting forward motion at a predetermined joint position before rebounding again.

Abstract: A training apparatus is disclosed. An illustrative embodiment of the training apparatus includes a base frame, a saddle pivotally carried by the base frame and a handle pivotally carried by the base frame and engaging the saddle.

Abstract: An exerciser including a movable body support mounted on an exerciser frame for movement along tracks provided by the frame. A movable foot support extends from the exerciser frame. The movable foot support is adapted to be engaged by the user's feet to absorb the energy of movement in a first direction and to provide the user with a bouncing movement, which the user may translate into a movement of the movable body support in the opposite direction. The movable foot support may be provided as an attachment and retrofitted to existing exercisers. The exerciser may include a resilient resistance system coupled to the movable body support and a set of pull lines with user grips trained over pulleys carried by the exerciser frame. Also disclosed are methods for enabling users to exercise.

Abstract: An abdominal exercise machine includes a bench assembly having a frame and a user support supported by the frame and configured for having a user lie thereupon, a weight assembly adjacent the bench assembly and having a weight carriage movably positionable thereon, a bar for engaging the legs of the user adjacent thigh and shin areas of the legs; and a cable passing through a plurality of pulleys and having a first end connected to the weight assembly and operably associated with the weight carriage for urging the weight carriage in a desired direction and a second end connectable to the bar.

Abstract: A therapeutic device, such as an exercise device, includes the principles of osteogenic repair by incorporating a vibrational loading mechanism into the exercise device. By doing so, the therapeutic device provides an increased osteogenic effect, thereby enhancing the benefits of the therapy. As an example, an exercise device includes a support surface for supporting all or part of the bodily tissue of an individual using the device. A linear or rotary vibrational loading mechanism associated with the frame or a rotational element of the exercise device drives the support surface at a selected load and frequency, thereby inducing mechanical loading of bodily tissue adjacent to the support surface sufficiently to facilitate the growth, development, strengthening, and/or healing of bone tissue.

Abstract: A system for positioning a user support of an exercise device, including a user support having a user support surface; a pair of positioning members connected to the user support, each positioning member extending outwardly from opposite sides of the user support and being substantially aligned along a common axis; a frame configured for supporting exercise weights and including a pair of spaced apart portions, the spacing between the spaced apart portions of the frame defining a space configured for receiving the user support; and a guide located on each of the spaced apart portions of the frame, each guide defining a plurality of receivers each of which is configured for receiving a portion of one of the positioning members, with the guides each located such that the receivers of each guide are in substantial registry with one another, wherein the user support is adjustably and incrementally positionable relative to the frame by selectively positioning the positioning members so that they are received by th

Abstract: Weightlifting system which is particularly suitable for doing leg presses having an inclined frame, a foot support near the lower end of the inclined frame for receiving the feet of an exerciser, a carriage adapted for receiving the back of the exerciser and being driven in an upward direction along the frame by extension of the legs of the exerciser, a weight bar extending laterally from each side of the carriage, a pair of weight stands positioned to the sides of the frame, and a plurality of weight plates disposed on each of the stands for selective attachment to the bar extending from each side of the carriage.

Abstract: An exercise apparatus includes a pressing bar assembly interconnected to a lifting assembly. As the pressing bar assembly is pivoted, the lifting assembly also pivots and angularly raises a seat assembly on which a user is positioned. Resistance bands and the user's own weight provide resistance to movement of the pressing bar assembly. A user may perform a variety of exercises on the inventive apparatus according to the position of the body. A user may perform exercises from an initial sitting position, an initial side-lying position, an initial prone position, or an initial kneeling position.

Abstract: A machine for bi-directional exercising of a muscle group through movement of lever arms against a selected resistance has a sub-frame mounted to a main-frame, for pivotal movement about a generally horizontal axis, and the levers connected to the sub-frame to pivot on a pair of spaced apart right and left pivot axes axially displaced to provide a moment arm about the horizontal axis. The lever arms each have a pedal, oriented to effect pivotal movement of the sub-frame about the horizontal axis, and a knee pad, oriented to effect pivotal movement of the lever arms about their respective right or left pivot axis. Linkage members connect each lever arm to the main-frame so that, as the sub-frame pivots through a given angle, the lever arms pivot through opposing angles, and a force applied to either the pedals or knee pads will move the sub-frame and lever arms through their respective angular ranges.

Abstract: An exercise bicycle includes a frame and a driven wheel. The frame has a base, a driven member which has an end pivotably connected to the base, and a contacting portion disposed on the driven member. The driven wheel, which is rotatably connected to the base, includes a rolling face contacted with the contacting portion. When the driven wheel is driven to rotate, the driven member will pivot reciprocatingly on a point where the driven member is connected with the base.