Abstract: An adjustable ab wheel has a main shaft and two wheels mounted on the main shaft. The main shaft has two external threaded sections. Each one of the two external threaded sections has a thread direction opposite to the thread direction of the other one of the two external threaded sections. Each one of the two wheels has a threaded hole axially defined through the wheel and mounted with a respective one of the two external threaded sections. When a user rolls the two wheels forward, the two wheels approach each other and abut against each other. Abutment between the two wheels allows the two wheels to brake themselves, so that the adjustable ab wheel can prevent users from over rolling the two wheels forward and suddenly falling down to the floor.

Abstract: An exercise-bar is provided for use with flexible resistance bands. The exercise-bar includes a rigid elongated bar; and a pair of rotating resistance band sheaves respectively installed at the opposing axial ends of the rigid bar. Each band sheave includes: a rotor secured for free rotation to an axial end of the rigid elongated bar; a band-collar carried on a band-support portion of the rotor and having an axial width to accommodate at least a width of a flexible resistance band thereabout; and a slotted cover shell carried on the rotor. The slotted cover shell includes an open axial end and a semi-circumferential cover portion covering a corresponding semi-circumferential portion of the band-collar and an axial slot extending into an axial end of the semi-circumferential cover portion and extending along at least the axial width of the band-collar.

Abstract: Commands are received from an exercise actuator via a control interface. Collaborative information about an exercise session is received via a software interface. A force from a central electromagnetic resistance unit is provided in response to the control interface and the software interface via a resistance mechanical interface.

Abstract: The present invention relates to a fitness equipment system for providing a substantially constant force through a range of motion and includes at least one constant force resistance component. The object of the present invention is to build a lightweight, easily movable and transportable fitness equipment system. The present invention uses the constant force released from the resistance components instead of the gravitational force from weights used in traditional fitness systems. Finally, the present invention can be used by personal trainers, physical therapist, field personnel, with no access to traditional facilities or weightlifting equipment or facilities.

Abstract: A resistance supplier for weight training has two switching assemblies, two planetary gear sets, a one-way output bearing, a spindle, and at least one weight. The two switching assemblies respectively control input, output, and fixing of the sun gear, planet carrier, and ring gear in the two planetary gear sets. The output of one of the two planetary gear sets is used as the input of the other planetary gear set. Therefore, the two planetary gear sets provide three reduction ratios and transmit torque to the spindle through the one-way output bearing to drive the weight to rotate. By using reduction ratios of the planetary gear sets to increase the output requirement of the user and switching gears via switching assemblies to change reduction ratios, the resistance supplier can provide sufficient and diverse training resistances with a single weight, thereby reducing the volume.

Abstract: A multifunctional balance exercise machine comprises a balancing mechanism including loading board, spring, elastic column, and motion-tracking sensor; a first display unit and an electronic control device loaded with motion sensor game program arranged on the exercise equipment; whereby when the fitness user stands on the loading board, the user body weight and the stress applied by feet transmit to the elastic column and the spring via the loading board, cause the elastic column and the spring compressed or stretched, and force the loading board to oscillate, then achieve the effect of balance exercise; furthermore, the motion tracking sensor transmit signal of oscillation data to electronic control device, the processor unit operates the data, and present the image of the motion sensor game via the first display unit to achieve entertaining effect of virtual reality game.

Abstract: A restoring mechanism for providing a restoring force to an exercising device which includes a fixing structure and a wheel is provided. The restoring mechanism includes a restoring set, a driving set and a connecting set. The restoring set includes a fixed portion and a link-up portion. The fixed portion is connected to the fixing structure. The driving set is connected to the link-up portion. The connecting set is selectively coupled to the driving set. When the connecting set is coupled to the driving set, rotation of the wheel causes the driving set to drive the restoring set such that the restoring set is allowed to accumulate energy.

Abstract: The exercise machine with a variable resistance system includes a frame, an exercise implement movably connected to the frame, a main shaft rotatably connected to the frame, a main connector attached between the main shaft and the exercise implement, a plurality of resistance assemblies and a plurality of actuation assemblies adapted for selectively engaging or disengaging at least one of the plurality of resistance assemblies with respect to the main shaft. The plurality of resistance assemblies apply a total level of rotational resistance against the main shaft based on which of the plurality of resistance assemblies are engaged with the main shaft by the plurality of actuation assemblies.

Abstract: An adjustable hand exerciser preferably includes a torsion spring, a handle, a handle cover, an adjustment plug and a center plug. The torsion spring preferably includes at least one spring coil, a first spring leg and a second spring leg. The handle includes a first spring hole to receive the first spring leg. The handle cover includes a first pivot extension and a second pivot extension. The adjustment plug preferably includes a sliding plug and a thumb screw. An inner sliding perimeter of the handle cover is sized to receive the sliding plug. The center plug includes a plug hole. The center plug is sized to be received by an inner perimeter of the at least one spring coil. A pivot pin is retained in the first and second pivot extensions and the plug hole, such that the handle pivots relative to the handle cover.

Abstract: A training device comprising a track having one or more channels extending along part of the length of the track, and one or more skates comprising bearings that can spin freely and are positioned to engage the one or more channels of the track. One or more foot blocks are affixed to the top surface of the one or more skates, wherein the skates can move along the length of the channels in the track.

Abstract: A walking training apparatus includes a walking assistance apparatus for a leg of a trainee, a first wire winding mechanism for pulling a wire for the leg upward and forward, pulling control means for controlling the first wire winding mechanism to pull the wire with a first pulling force, and storage amount detection means for detecting a storage amount of the wire. The pulling control means controls the first wire winding mechanism so that the first wire winding mechanism pulls the wire with a second pulling force larger than the first pulling force in a swinging start period in which the storage amount of the wire detected by the storage amount detection means is equal to or smaller than a predetermined storage amount of the wire in a period including a timing when the wire of the first wire winding mechanism changes from a pulling-out state to a winding state.

Abstract: A stationary strength training equipment includes a frame assembly, a lockable bilateral user interface installed on the frame assembly, a balancing structure connected to the lockable bilateral user interface, a plurality of user selectable weights supported by the frame assembly and connected to the balancing structure, a load detecting strain gauge disposed on the user selectable weights to detect a weight of the user selectable weights being lifted, and an informing device connected to the lockable bilateral user interface to detect and show a warning signal to a user. The lockable bilateral user interface further includes a locking mechanism assembly and a central pivot assembly; the balancing structure is able to rotate along the central pivot assembly, and the locking mechanism assembly selectively restricts a rotation of the balancing structure.

Abstract: A fan damping device for adjusting magnetic resistance includes: a support frame, a fan wheel, a ring-shaped magnetic core, a magnetic control unit, and a control unit. The fan blades of the fan wheel can provide air resistance, and the magnetic control unit and the control unit provide adjustable magnetic resistance. By such arrangements, resistance can be increased without increasing the size and weight of the present invention. Besides, the resistance is adjustable as desired to improve convenience of use.

Abstract: An exercise device has a pair of axially spaced reels 102a, 102b, which are each biased by a spiral spring 108. Each reel is attached to one end of a respective strap 130a, 130b and an outer end of each strap is attached to a carabiner 134a, 34b. Each reel is selectably releaseable by a locking arrangement 112a, 112b, 16, 117, that is able to interfere with rotation of the reels 102a, 102b, in dependence upon action by a user. Each reel is independently rotatable and each strap 130a, 130b may be extended or retracted independently of one another. Using the carabiners 134a, 134b, each strap may be secured to an attachment 10 beam so that the straps form a V-configuration and it is envisaged that two such exercise devices may be used so that a user may perform exercises such as push-ups, triceps dips, back pulls and pull-ups.

Abstract: A finger weight device is provided with two arcuate jaws. Each jaw having a lower portion with tines extending therefrom and are connected together at an upper portion by a hinge. The jaws have an inwardly facing surface configured to enclose around a finger of a person. A spring is configured to urge the tines towards each other such that the inwardly facing surface of the jaws secure the device about the finger. Each jaw has an handle extending from the upper portion, which when moved towards each other causes the tines to separate from each other. At least one weight receiving portion, and at least one weight corresponding to the receiving portion is provided for adding a desired weight to the device.

Abstract: A torsion bar includes a housing and at least one inner core. The housing has a receiving space, two opposite fixing grooves defined in a sidewall of the housing and communicating with the receiving space, and a plurality of stripes positioned at an outer surface thereof. The inner core is received in the receiving space, and includes two opposite fixing elements corresponding to the fixing grooves. Each of the fixing elements includes a plurality of first protruding portions located at a side end thereof to facilitate a user to disengage from the housing, and a plurality of second protruding portions located at a surface thereof adjacent to the side end to prevent the inner core from disengaging accidently from the housing. A cross-section of the receiving space is similar to a cross-section of the inner core.

Abstract: An exercise apparatus includes an upper assembly and a lower assembly for coupling with the upper assembly. A plurality of engaging channels are provided at an inner surface of the lower assembly at a variety of orientations. A plurality of resistance media are provided with the exercise apparatus in configurations enabling selective coupling with the engaging channels. In a method of using the exercise apparatus, a user couples one or more of the plurality of exercise media with the engaging channels, performs at least one first exercise by pulling the coupled exercise media from a contracted position to a stretched position and changes the orientation of the exercise media to perform at least one second exercise.

Abstract: An apparatus includes a weightlifting bar. The apparatus further includes a set of cams each having an opening and a weight loading bar protruding therefrom and being substantially perpendicular to the cam, wherein each of the set of cams is suspending from the weightlifting bar. A linear bearing slidably engages with the weightlifting bar, and the linear bearing is fitted in the opening of the cam. A set of shaft collars secure the linear bearing in a position on the weightlifting bar between the set of shaft collars.

Abstract: An exercise machine handle system which provides a unique handle and rotatable handle hub configuration to aid in performing a variety of exercises. The exercise machine handle system generally includes one or more handle assemblies each having a mounting bracket adapted to be removably secured to an exercise machine and including an upwardly-extending mounting hub shaft. A handle hub having a pair of curved handles extending in opposite directions therefrom is rotatably securable around an upper end of the handle hub shaft into a variety of locked positions. A third curved handle extends from an upper end of the handle hub in a similarly rotatably securable position. By removably securing one or more handle assemblies to an exercise machine, a user can benefit from a wide range of exercises supported by the adjustable handle assemblies.

Abstract: A wheeled exercise device includes a first wheel part and a second wheel part coupled to the first wheel part, with the first and second wheel parts coupled together on a central axle therethrough so as to form a central main wheel with a generally flat center circumference and angled outer circumferential sides. The device includes a pair of handles, each handle extending outward and downward at an angle from the central axle from a corresponding wheel part.

Abstract: Apparatus for both supporting an occupant as a task chair and exercising the lumbar extensors. The chair has two configurations. One configuration is as a task chair. A second configuration is as an exercise device in which the arm rests move to restrain the anterior pelvic region and the lumbar support becomes a posterior pelvic restraint. The seatback moves through a range of motion with a strength curve ratio of about 1.4:1 between flexion and extension. The chair has a resistance mechanism that includes a four-bar linkage connected to a selectable group of coil springs. The chair includes a range of motion monitor and detectors that communicate with a feedback system, which indicates if the occupant is performing the exercise correctly. The feedback system displays a screen showing the angular position of the seatback with a comparison of the ideal position for the exercise.

Abstract: An apparatus combines a beverage holder (e.g., a mug) with a compressible device (i.e., a gripper or handgrip) that is usable as an exercise apparatus for a users hands, wrists or forearms. This dual purpose apparatus can function not only as a mug or insulator but also a squeezable exercise device whereby flexing and relaxing a user's hand, the user conditions their hands, wrists or forearms. The device may also include lights or audio. In some embodiments the handgrip may be detachably attached to the beverage container to allow the independent use of the holder and handgrip.

Abstract: A slimming machine, comprising U-shaped left and right arm tubes and resiliently retractable mechanisms that are attached to the two ends thereof, in which each resiliently retractable mechanism includes an inner joint cover, an outer joint cover and a torsion spring, left and right splice sleeves that are fixed on the respective inner and outer joint covers are connected with inner chambers of the joint covers, the outer joint cover can be rotationally mounted on the inner joint cover via a connecting shaft, the torsion spring is sheathed on the connecting shaft with one end disposed in the left splice sleeve and the other end in the right splice sleeve, and the left and right splice sleeves are fixed on the respective left and right arm tubes. Such structure is simple, reasonable, easy to operate, cost effective, and meanwhile it has excellent fitness effects.

Abstract: An exercise machine that provides a generally consistent resistive force against a user who walks, steps, or runs away from the machine as part of a strength training exercise program. The machine is built upon a movable frame having transport wheel assemblies that allow the exercise machine to be placed on an indoor floor surface or on the ground outdoors. The frame of the device further supports three parallel spinning assemblies that together allow a length of linear strap attached to the user to run out from the machine and thereafter be retracted or rewound back into the machine. The spinning assemblies include a flywheel assembly, a spool assembly, and a spring assembly, each co-axially arranged on a spin axle extending across the frame. The spring assembly is fixed against the frame and incorporates a coil spring that tightens with the rotation of the spin axle in a first direction (allowing the linear run-out strap to extend out from the spool assembly).

Abstract: An exercise device is provided. The exercise device has an upper bar and lower bar pivotally joined together by a spring housing. The bars resist movement towards each other by the force of a spring within the spring housing. The exercise device is configured to be mounted under a chair such that it may be utilized while a user is seated in the chair.

Abstract: A hand therapy system including a post having an upper end and a lower end, a support base secured to the lower end of the post for supporting the post atop a surface, and a hand exercise housing mounted on the post for moving between the upper and lower ends of the post. The hand exercise housing includes a plurality of first hand tool openings provided on a first side of the hand exercise housing, a plurality of second hand tool openings provided on a second side of the hand exercise housing, a progressive resistance system in communication with each of the first and second hand tool openings, and a plurality of resistance level adjustment elements coupled with the progressive resistance system. Each of the resistance level adjustment elements is associated with one of the first and second hand tool openings for selectively adjusting the resistance level of each of the first and second hand tool openings.

Abstract: An exercise device for exercising hand, wrist, arm, and upper body muscles having adjustable force resistance and a force setting indicator. The exercise device includes a housing, a first handle connected to one end of the housing, a second handle connected to the opposite end of the housing, an inner spring disposed inside the housing, and an outer spring disposed inside the housing. The outer spring is connected to the inner spring and encases the inner spring. An adjuster knob disposed on the second handle and coupled to the inner spring and configured to adjust a tension of the inner spring and compression of the outer spring.

Abstract: An exerciser machine applicable for strengthening a user's muscles via wave like movements is described. The exerciser can include a base assembly a resilience member and a seat pan. The seat pan may be rotatably attached to the base assembly via the resilience member. The seat pan may have a seat protrusion movably attached to a top end of the resilience member. The base assembly may have a base protrusion to secure a bottom end of the resilience member. A separation distance between the seat protrusion and the base protrusion along an axis of the resilience member can allow the resilience member to distort along the separation distance to provide resilience force with movement of the seat pan. The resilience force can allow exercising a user's body via the movement of the seat pan.

Abstract: An exercise machine tension system for improving functionality and linear resistance of a Pilates machine. The exercise machine tension system generally includes an exercise machine including a carriage slidably positioned thereon. A plurality of tension units are connected between the exercise machine and the carriage for creating linear resistance as the carriage is drawn in a first direction and reverting the carriage back to its original position absent application of force. Each tension unit includes a housing, a reel rotatably positioned within the housing, a torsion spring secured to the reel, and a flexible member wound around the reel and extending out of the housing. The housing is secured to the exercise machine and the distal end of the flexible member is secured to the carriage.

Abstract: An abdominal exercise equipment is provided with two front wheels and two rear wheels to ensure that the abdominal exercise equipment can move stably without tipping over during movement, preventing the exerciser from losing balance and getting hurt. A return gear assembly is disposed between the two rear wheels to produce a recovering force. Therefore, when the abdominal exercise equipment is pulled back, the recovering force will assist the exerciser to pull the abdominal exercise equipment back, which consequently lowers the difficult level of exercise. Furthermore, the abdominal exercise equipment is provided with a vibration device which is capable of softening the muscles and fat, and speeding up fat loss by producing vibration.

Abstract: A hand, wrist, arm and fingers therapy and exercising device which includes a push bar pivotally connected to a base and a wrist support portion. The push bar is moveable between a neutral position, an extended position and a stretching position. The push bar includes finger cams at the end thereof for exercise of the fingers.

Abstract: A method is provided for exercising a human appendage that includes placing the appendage in contact with a user interface and placing a force on the user interface where the user interface based on a net user force becomes displace from an unbiased position to a biased position, where the user interface when moving from the unbiased position to the biased position moves about a path defined by a semispherical surface having defined by an origin, a radius and an angle of displacement.

Abstract: Exercise shoe assemblies include a shoe body, at least one support bracket integrated into the shoe body, and a resistance device connected to the support bracket. The resistance device preferably includes a flexible member, and may include a housing from which the flexible member is extracted.

Abstract: The improved exercise apparatus comprises a housing assembly having first and second arm members. The apparatus may be used to perform a variety of full body exercises generally by moving the first and second arms about an axial stem of the housing assembly. In one embodiment, the arm members rotate or pivot about the axial stem. A tension assembly provides resistance to the movement of the arm members while a positioning assembly allows the arm members to be positioned and secured in various positions relative to one another. One or more handle attachments may be provided to allow the apparatus to be grasped or used in various ways. A method of training various portions of the body with the apparatus is also provided herein.

Abstract: A flexible ring is disclosed comprising one or more coiled springs and/or polymeric ring(s). In some embodiments, the coiled spring envelopes one or more inner coiled springs. In other embodiments, one or more handles circumscribe a portion of the outer coiled spring. Various embodiments of the present invention substitute flexible polymeric members for the coiled spring. In other embodiments, a disc is substituted for the polymeric ring(s).

Abstract: One example embodiment includes a resistance chamber for use in an exercise system. The resistance chamber includes a first chamber and a second chamber. The second chamber is configured to attach to the first chamber and rotate relative to the first chamber. The resistance chamber also includes a core rod. The core rod resides within the first chamber and the second chamber and is attached to the interior of the second chamber. The resistance chamber further includes a resistance tube, where at least of a portion the resistance tube is configured to be placed between the interior surface of the first chamber and the core rod.

Abstract: According to certain aspects, the invention includes a limb-exercising system for coupling (i.e., attaching, retrofitting) to or manufacturing with the swivel chair. The limb-exercising system includes a rigid framework, at least one limb-exercising unit, a force resistor and a cable. The rigid framework includes at least one chair coupler that couples the rigid framework with the swivel chair (e.g., so that the limb-exercising apparatus is disposed underneath the chair leg base), such that the relative movement between the rigid framework and the swivel chair is minimal. The rigid framework is coupled with the limb-exercising unit and with the force resistor, which in turn is coupled with the limb-exercising unit via the cable. The limb-exercising unit is operative to provide movement exercise for at least one muscle group of the body of a user.

Abstract: An upper body exercise apparatus includes a spring positioned in a housing interior area. First and second cables have respective first ends operatively coupled to the spring and respective second ends extending away from the housing. Respective movements of the first and second cables away from the housing cause the spring to move toward a biased configuration. The exercise apparatus includes a transmission configured such that an outward movement of the first cable in the absence of an outward movement of the second cable causes all of the springs resistance to be transmitted to the first cable, an outward movement of the second cable in the absence of movement of the first cable causes all of the spring's resistance to be transmitted to the second cable, and an outward movement by both cables causes the spring's resistance to be distributed equally between the first and second cables.

Abstract: The Individual Workout System allows an user to perform a complete workout regiment to build muscles without the use of weights, while achieving a cardiovascular workout at the same time. The system could be worn by an individual during aerobics, walking, jogging or doing menial tasks. The Individual Workout System is uniquely design to use resistance to build muscle without restricting an individual to weights or equipment. By placing a thin devise used to create resistance in the place of the bodies joints and flex points, such as the shoulders, elbows, knees and waist, causes resistance for the muscles in that region of the body.

Abstract: The therapeutic equipment according to the present invention is designed to heal and strengthen the joints and muscle in the body. The equipment comprises a plastic material molded bottom base and a plastic material molded top base which is connected to the bottom base by a swivel allowing both clockwise and counterclockwise rotational movements while an individual placing their hand or foot into and applying force within the holster that is mounted on top of the top base. The equipment comprises resistance bands and adjustable resistance levers to adjust for the desired resistance force. The equipment is light weight and small in size and thus is portable. Both the top base and bottom base can be manufactured by plastic molding process and thus is easy for manufacturing and economic in production cost.

Abstract: A multifunction dumbbell includes a handle having two projections on both ends respectively; two hollow weight members each having a protrusion extending toward the handle; two spacer sleeves each having a closed flange fixedly secured to a joining portion of the handle and either projection, with the spacer sleeves fixedly fastened between the protrusions and the projections; two rings each having an inner diameter less than an outer diameter of the weight member so that the rings can be put on the weight members and retained thereon respectively; two half-spherical members each fixedly secured to the ring and complimentarily engaged with the weight member; and two truncated conic springs each put on the protrusion and a portion of the weight member to be retained between the spacer sleeve and the ring. The rings and the half-spherical members together are adapted to rotate about the weight members.

Abstract: The invention relates to a personal training device that prevents the need for complex gym apparatus, said novel simple and portable device enabling the user to carry out various types of exercise anywhere, in a simple and comfortable manner.

Abstract: A resistance apparatus for use with exercise devices includes an axle and outer housing for rotatably mounting the axle therein. At least one inner housing includes an opening for receiving the axle therethrough so that the inner housing is fixably mounted on the axle. The inner housing is rotatably mounted inside the outer housing to permit rotation of the inner housing along with the axle within the outer housing. At least a first tensioned member is disposed within the inner housing. The first tensioned member includes a first end and a second end. The first end of the tensioned member engages an engagement area of the inner housing. The second end of the tensioned member engages an engagement area of the outer housing. The tensioned member creates a rotational restoring force between the inner housing and the outer housing.

Abstract: A resistance device for use with an exercise machine includes an arbor member structured to be rotatably coupled with respect to the exercise machine. The arbor member having a first end and an opposite second end.

Abstract: A muscle toning kit includes an exercise garment having a first resistance article and a second resistance article. The first resistance article and the second resistance article cooperate to facilitate the exercise of at least one muscle group of a user. The first resistance article is adjustable to provide a range of user selected resistance levels, while second resistance article has another range of user selected resistance levels so that as the user maneuvers the exercise garment, its adjustable pressure opposing structures facilitate the toning and conditioning of the at least one muscle group of the user. The method includes wearing and deforming the exercise garment from its original shape through natural extension and flexing actions of the user to facilitate providing a resistive force to condition the at least one muscle group of the user.

Abstract: A foot pain relief device can advantageously provide multiple angles of inclination, directed pressure against the plantar fascia, as well as ease of manufacturing and assembly. A toe strap, which is fastened around the ankle and the toe(s), ensures that the toes are flexed up. This toe flexing tenses the plantar fascia of the foot. A ball strap can be threaded through a hole in a ball and then operatively coupled with the toe strap. When operatively coupled to the toe strap, the ball strap keeps the ball positioned on the bottom of the foot while allowing ball mobility. The mobility of the ball can provide directed pressure on at least one component of the plantar fascia. Notably, the simultaneous combination of tension to the plantar fascia and directed pressure to the component(s) of the plantar fascia can be particularly effective at relieving foot pain.

Abstract: A slimming machine, comprising U-shaped left and right arm tubes and resiliently retractable mechanisms that are attached to the two ends thereof, in which each resiliently retractable mechanism includes an inner joint cover, an outer joint cover and a torsion spring, left and right splice sleeves that are fixed on the respective inner and outer joint covers are connected with inner chambers of the joint covers, the outer joint cover can be rotationally mounted on the inner joint cover via a connecting shaft, the torsion spring is sheathed on the connecting shaft with one end disposed in the left splice sleeve and the other end in the right splice sleeve, and the left and right splice sleeves are fixed on the respective left and right arm tubes. Such structure is simple, reasonable, easy to operate, cost effective, and meanwhile it has excellent fitness effects.

Abstract: A physical training device includes two arm portions connected to each other and movable toward and away from each other. Two grip portions are provided at the respective arm portions. The grip portions together have the shape of a ball, such as a basketball or football. A resilient device urges the grip portions away from each other toward an extended position. The physical training device is particularly useful in training for basketball rebounding.

Abstract: An exercise tool is provided to ensure a good degree of freedom in the direction of movement of the wrists and allows the magnitude of the load applied to the wrists during the exercise to be changed easily so as to enable more effective strengthening of the deep muscles. The exercise tool has a first rod body 10 and a second rod body 20 which are rotatable in opposite directions and also movable away from each other against the biasing force of a coil spring 70. Ring-shaped latch portions 71 and 72 provided at respective ends of the coil spring 70 are removably latched by first and second elastic-member latch bodies 50 and 60, respectively, so that the coil spring 70 can readily be replaced with another coil spring 70 having a different elastic force, thereby facilitating changing the magnitude of the load applied during the wrist exercise.

Abstract: An improved exercise apparatus is described. The apparatus comprises a cylindrical element and a flexible member associated with the cylindrical element. The flexible member is movable between a wound configuration, in which the member is wound around the cylindrical element, and an unwound configuration, in which the member is unwound from the cylindrical element. The apparatus further comprises a recoil means biased to move the flexible member to the wound configuration and a resistance means that resists movement of the flexible member from the wound to the unwound configurations. The resistance means comprises an energy storage device, which is in a geared relationship with the cylindrical element. In a preferred embodiment the energy storage device is a flywheel.