US20090048082A1 - Abdominal exercise device - Google Patents
Abdominal exercise device Download PDFInfo
- Publication number
- US20090048082A1 US20090048082A1 US12/222,471 US22247108A US2009048082A1 US 20090048082 A1 US20090048082 A1 US 20090048082A1 US 22247108 A US22247108 A US 22247108A US 2009048082 A1 US2009048082 A1 US 2009048082A1
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- United States
- Prior art keywords
- pivoting
- upper section
- exercise device
- upright base
- abdominal exercise
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B23/00—Exercising apparatus specially adapted for particular parts of the body
- A63B23/02—Exercising apparatus specially adapted for particular parts of the body for the abdomen, the spinal column or the torso muscles related to shoulders (e.g. chest muscles)
- A63B23/0205—Abdomen
- A63B23/0211—Abdomen moving torso with immobilized lower limbs
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/16—Supports for anchoring force-resisters
- A63B21/1609—Supports for anchoring force-resisters for anchoring on a chair
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/02—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
- A63B21/045—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters having torsion or bending or flexion element
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2208/00—Characteristics or parameters related to the user or player
- A63B2208/02—Characteristics or parameters related to the user or player posture
- A63B2208/0228—Sitting on the buttocks
- A63B2208/0233—Sitting on the buttocks in 90/90 position, like on a chair
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2210/00—Space saving
- A63B2210/02—Space saving incorporated in chairs
Definitions
- the present invention relates to exercise devices, and in particular, to abdominal exercise devices.
- U.S. Pat. No. 6,213,923 discloses an exercise device where a user in a sitting position pulls a pivoted backrest portion forwardly to perform a sit-up type exercise.
- the pivot position is generally at the base of the seat.
- U.S. Pat. No. 6,296,598 shows a particular apparatus which is placed to the front side of the user sitting on a chair and the user effectively compresses the device by means of a forwarded pivoting action to form a crunch-type exercise.
- the present invention provides an exercise device that is easily supported on an upright chair or made as an integral part of a conventional chair such as a desk chair.
- An abdominal exercise device comprises an upright base connected to a pivoting upper section.
- the upper section includes two pivoting handles adapted to extend forwardly at an upper edge of the pivoting upper section in a perpendicular manner to provide hand grip extensions above the shoulders of a user used to pivot the upper section relative to the upright base.
- the upper section and the upright base include a variable bias arrangement adapted to provide a resisting force when the upper section is pivoted forwardly relative to the upright base.
- the upright base is of a length significantly greater than the pivoting upper section, such that a pivoting axis between the pivoting upper section and the upright base is generally located adjacent a lower edge of the shoulder blades of a user.
- the bias arrangement includes replaceable torsion rods extending across the pivot axis and secured to the upright base and the pivoting upper section.
- the upright base and the pivoting upper section each include at least three securement slots for retaining the replaceable torsion rods.
- the upright base and the pivoting upper section each include a molded plastic structural support having the securement slots molded therein.
- the replaceable torsion rods are inserted or removed through a top access slot of the pivoting upper section.
- the pivoting upper section and the upright base include a common upholstered front face including an inner foam cushion layer.
- the upright base and the pivoting upper section each include opposed lugs including a pivoting port that receives a pivot shaft and forms part of the pivot axis.
- the hand grip extensions are telescopic and lockable to set a hand grip extension appropriate for the user.
- the pivoting handles are movable between a storage position, with the hand grip extensions extending across a width of the upright portion at an upper edge thereof, to an exercise position, with the hand grip extensions generally perpendicular to the pivoting upper section.
- the exercise device forms the backrest portion of a chair and preferably forms the backrest portion of an office chair.
- FIG. 1 is a schematic perspective view showing the abdominal exercise device supported on a chair with a user about to commence an exercising motion
- FIG. 2 is a schematic similar to FIG. 1 with the user having moved the exercise device to perform the initial step of the abdominal exercise;
- FIG. 3 is a partial exploded perspective view showing the interior components of the abdominal exercise device, and in particular, the torsion bars used to increase the resistance to the exercising motion;
- FIG. 4 is a schematic side view of the interior components of the exercise device
- FIG. 5 is a partial front view showing an alternate pivot securement of the upright base portion to the pivoting upper section
- FIG. 6 is a partial perspective view showing further details of a preferred hinge connection with limited rotation
- FIG. 7 is a perspective view of the upholstered abdominal exercise device
- FIG. 8 is a perspective view of a preferred telescoping handle arrangement
- FIG. 9 is a schematic perspective view of the abdominal exercise device forming the back portion of an office-type chair.
- FIG. 10 is a partial perspective view of an alternate handle arrangement.
- the abdominal exercise device 2 is shown supported on an office-type chair 90 in FIGS. 1 and 2 .
- the abdominal exercise device is shown in an initial position in FIG. 1 and in a pivoted forward position in FIG. 2 .
- the exercise device includes an upright base portion 4 supported by a suitable chair and a pivoting upper section 6 .
- the user uses the pivoting handles 14 to pull the pivoting upper section forwardly as the upright base portion remains generally fixed.
- FIG. 3 shows the interior components of the abdominal exercise device 2 including the upright base 4 and the pivoting upper section 6 .
- the telescopic handles 14 include a securing extension 15 and a hand grip extension 16 . These telescopic handles 14 are each received within a handle support 18 provided on the upper support 24 .
- the upper support 24 is pivotally secured to the bottom support 22 by a pivoting hinge 50 . This pivoting hinge forms a pivot axis 20 about which the upper support 24 pivots relative to the bottom support 22 .
- the upper support 24 and the bottom support 22 are each of a molded plastic to include the handle supports 18 as well as the series of upper torsion bar supports 32 and lower torsion bar supports 34 .
- the torsion bar supports 32 and 34 can be of greater length to provide additional support of the torsion bars such that deflection primarily occurs adjacent the pivot axis 20 .
- Torsion bars 28 are easily inserted and removed from the supports 32 and 34 , allowing a simple mechanism for varying the force required to perform the pivoting motion.
- the torsion bars 28 extend across the pivot axis 20 and have a bias to the straight configuration shown in FIG. 3 .
- the bars 28 are preferably made of a fiberglass, spring steel or reinforced plastic material.
- FIG. 4 the side view shows the torsion bars 28 being deformed and providing resistance to the pivoting of the upper support 24 relative to the bottom support 22 .
- Three torsion bars 24 have been shown; however the device can be adapted to include additional bars or bars of varying strengths. In this way, a simple mechanism is provided allowing adjustment of the bias force such that the abdominal exercise device can be appropriately set for different users.
- the handles 14 are also height adjustable within handle supports 18 and are set according to the requirements of the user. Shown in dotted lines in FIG. 3 is the upholstered exterior face of the exercise device indicated as 40 . This typically includes a compressible foam cushion portion and a suitable outer fabric portion.
- the exercise device is typically made to allow access to the back portion of the exercise device, or at least the upper end portion of the exercise device, to allow for convenient replacement of the torsion bars 28 .
- FIGS. 5 and 6 Details of a preferred pivoting hinge arrangement are shown in FIGS. 5 and 6 with FIG. 6 also illustrating a pivot limiting lock.
- the pivoting hinge 50 includes a pivot shaft 52 having threaded end portions 54 . These threaded end portions receive the upper pivoting lugs 56 and also receive the lower pivoting lugs 58 on the threaded portions. Threaded knobs 60 retain the pivoting lugs on the pivot shaft 52 . Other arrangements for forming the pivot axis are also possible.
- the upper pivoting lugs 56 are shown with a large gap 55 adjacent the pivot shaft 52 . This accommodates pivoting and avoids the compressible foam or upholstered fabric pinching the user.
- the bottom pivoting lugs could also be of a longer length to avoid this tendency if necessary.
- the upper pivoting lugs 56 include stop projections 57 that engage stop lugs 59 of the lower pivoting legs 58 .
- the stop projections 57 and the stop lugs 59 cooperate to limit the angle of forward pivoting of the pivoting upper section 6 relative to the upright base portion 4 .
- the preferred maximum angle of rotation is in the range of 30 degrees to 40 degrees. Further rotation is not beneficial and may be counter productive. Although a fixed rotation limiting arrangement is shown it could be adjustable to be varied by the user.
- the abdominal exercise device 2 has the pivot axis 20 at a relatively high position adjacent to generally correspond to the shoulder blade height of the user. This provides a pivoting action of the user at a much higher location than would be the case with respect to a sit-up type exercise. This pivoting exercise of the user at the higher location strengthens the abdominal muscles and also helps alleviate back problems associated with the muscles adjacent the lower portion of the back.
- the telescopic handles 14 are height adjustable as they telescope within the handle supports 18 of the exercise device.
- the handles also telescope as shown in FIG. 8 , such that the hand grip 16 is of variable length by means of adjusting the first segment 16 a relative to the second segment 16 b. This dual adjustment allows the exercise device to be adjusted to suit different physical attributes of the particular users. In addition, it allows the hand grip 16 to be reduced in length and easily stored across the top of the exercise device.
- the upright base portion 4 is typically placed in a chair, and due to the particular high pivoting action, the user tends to force this upright portion back into contact with the upright portion of the seat. In this way, it is often not necessary to include a strap maintaining the upright portion 4 against the upright portion of the chair. Such a strap can be provided if desired.
- a removable seat portion 100 is releasably attached to the upright base portion 4 .
- FIG. 10 An alternate handle embodiment is shown in FIG. 10 where rope handles 17 have replaced the “L” shaped rigid handles 14 .
- the rope handle 17 includes an adjustable limiting member 17 a that could be a separate slidable lockable member or could be a large knot in the rope handle.
- the user appropriately adjusts the flexible handles 17 for his physical requirements. There is a preferred position of the user's arms and elbows such that the hands are either side of the user's head and between his shoulders and ears.
- the flexible handles avoid the tendency of a user to use leverage and his arms to complete the exercise rather than the abdominal muscles.
- the arms basically form a force transfer linkage between the pivoting upper section 6 and the user's abdominal muscles. There should be no significant use of the arms to cause pivoting and the rope handles reduce this possibility.
- the user positions himself to have his back in contact with the upright base portion 4 and reaches rearwardly to engage the handles 14 .
- the user then pulls on the handles to pivot the upper support 24 about the hinge axis 20 .
- the upright base portion 4 of the abdominal exercise device is maintained in the upright position and remains motionless while providing a lordotic support position (normal lumbar curvature for the user). Therefore, the lumbar spine does not participate in the exercise. This is a fundamental difference, in that many studies over the years have shown that a sit-up/crunch maneuver with flexion at the waist produces a shearing effect on the spinal facet joints and a posterior disc stress (bulging) on the lumbar discs.
- the user can adjust the resistance required to pivot the upper support 24 relative to the bottom support 22 by adding additional torsion bars.
- the pivot point is higher on the user's back, and the forward motion of the user against the resistance exercises (concentrically and eccentrically), the desired abdominal muscles including the rectus abdominus, intertransversaii, internal and external obliques and serratus anterior, while minimizing involvement of the hip flexors.
- This abdominal exercise device can advantageously be used with existing chairs, such as office chairs, work station chairs, kitchen chairs, television room chairs, dining room chairs, etc. to allow a user a simple, low cost device for performing a consistent crunch exercise.
- the device is economical, durable and small in size thereby simplifying storage when not in use. It can remain in one chair indefinitely, as it is contoured as a lumbar support.
- the abdominal and back machine has been shown as being an add-on for use with an existing chair, however it can be appreciated that this exercise device with the retractable handles can be built in as part of a conventional office, desk chair or specialized exercise chair as shown in FIG. 8 .
- a person who is generally performing a desk job can use the exerciser as an add-on device or as an integral device part of his normal chair to perform crunch exercises from time to time.
- This particular arrangement can be integral with the chair and as such is unobtrusive.
- the retractable handles and the pivoting point at a raised position on the chair can all be concealed to provide an effective office chair with a pleasing appearance appropriate for normal office requirements.
- the desired lumbar support is provided.
- this abdominal exercise device assists the user in isolating the appropriate muscles for strengthening the abdominal area and increasing the core strength of the user.
- Many exercise devices fail to effectively strengthen these muscles.
- the upright base portion 4 is of a height at least two to three times the height of the pivoting upper section 6 .
Abstract
The abdominal exercise device is designed for upright orientation with a user bending forwardly and downwardly. An upper pivotal section moves relative to an upright base and a bias force is provided by torsion type bars. The particular pivot location and handle arrangement reduces the possibility of misuse and targets the abdominal muscles.
Description
- This invention claims priority from the earlier-filed U.S. Provisional Application No. 60/935,450, filed on Aug. 14, 2007.
- The present invention relates to exercise devices, and in particular, to abdominal exercise devices.
- Abdominal exercises are recommended for toning of the abdominal area, increasing the core strength of an individual, and alleviating back problems. The proper exercise of the abdominal muscles is often confused with the traditional sit-up, whereas in fact, exercise of the lower abdominal muscles requires a significantly different motion.
- Various portable exercise devices are well-known and a number of these devices are designed to assist a user in properly completing a sit-up. One such exercise device is shown in U.S. Pat. No. 5,871,425. This device is supported on the floor and the user performs the sit-up against a variable resistance that is adjustable by the user.
- U.S. Pat. No. 6,213,923 discloses an exercise device where a user in a sitting position pulls a pivoted backrest portion forwardly to perform a sit-up type exercise. The pivot position is generally at the base of the seat.
- There are a number of devices that have been proposed for use in combination with a traditional chair. One such device is shown in U.S. Pat. No. 6,110,081.
- More recently there has been a shift in emphasis from a sit-up type exercise to a crunch-type exercise for exercising the abdominal muscles. U.S. Pat. No. 6,296,598 shows a particular apparatus which is placed to the front side of the user sitting on a chair and the user effectively compresses the device by means of a forwarded pivoting action to form a crunch-type exercise.
- The present invention provides an exercise device that is easily supported on an upright chair or made as an integral part of a conventional chair such as a desk chair.
- An abdominal exercise device according to the present invention comprises an upright base connected to a pivoting upper section. The upper section includes two pivoting handles adapted to extend forwardly at an upper edge of the pivoting upper section in a perpendicular manner to provide hand grip extensions above the shoulders of a user used to pivot the upper section relative to the upright base. The upper section and the upright base include a variable bias arrangement adapted to provide a resisting force when the upper section is pivoted forwardly relative to the upright base. The upright base is of a length significantly greater than the pivoting upper section, such that a pivoting axis between the pivoting upper section and the upright base is generally located adjacent a lower edge of the shoulder blades of a user.
- According to an aspect of the invention, the bias arrangement includes replaceable torsion rods extending across the pivot axis and secured to the upright base and the pivoting upper section.
- In a further aspect of the invention, the upright base and the pivoting upper section each include at least three securement slots for retaining the replaceable torsion rods.
- In a preferred aspect of the invention, the upright base and the pivoting upper section each include a molded plastic structural support having the securement slots molded therein.
- In yet a further aspect of the invention, the replaceable torsion rods are inserted or removed through a top access slot of the pivoting upper section.
- In a preferred structure of the invention, the pivoting upper section and the upright base include a common upholstered front face including an inner foam cushion layer.
- In a different aspect of the invention, the upright base and the pivoting upper section each include opposed lugs including a pivoting port that receives a pivot shaft and forms part of the pivot axis.
- In yet a further aspect of the invention, the hand grip extensions are telescopic and lockable to set a hand grip extension appropriate for the user.
- In an aspect of the invention, the pivoting handles are movable between a storage position, with the hand grip extensions extending across a width of the upright portion at an upper edge thereof, to an exercise position, with the hand grip extensions generally perpendicular to the pivoting upper section.
- In yet a different aspect of the invention, the exercise device forms the backrest portion of a chair and preferably forms the backrest portion of an office chair.
- Further embodiments of the invention are shown in the drawings, wherein:
-
FIG. 1 is a schematic perspective view showing the abdominal exercise device supported on a chair with a user about to commence an exercising motion; -
FIG. 2 is a schematic similar toFIG. 1 with the user having moved the exercise device to perform the initial step of the abdominal exercise; -
FIG. 3 is a partial exploded perspective view showing the interior components of the abdominal exercise device, and in particular, the torsion bars used to increase the resistance to the exercising motion; -
FIG. 4 is a schematic side view of the interior components of the exercise device; -
FIG. 5 is a partial front view showing an alternate pivot securement of the upright base portion to the pivoting upper section; -
FIG. 6 is a partial perspective view showing further details of a preferred hinge connection with limited rotation; -
FIG. 7 is a perspective view of the upholstered abdominal exercise device; -
FIG. 8 is a perspective view of a preferred telescoping handle arrangement; -
FIG. 9 is a schematic perspective view of the abdominal exercise device forming the back portion of an office-type chair; and -
FIG. 10 is a partial perspective view of an alternate handle arrangement. - The
abdominal exercise device 2 is shown supported on an office-type chair 90 inFIGS. 1 and 2 . The abdominal exercise device is shown in an initial position inFIG. 1 and in a pivoted forward position inFIG. 2 . The exercise device includes anupright base portion 4 supported by a suitable chair and a pivotingupper section 6. The user uses thepivoting handles 14 to pull the pivoting upper section forwardly as the upright base portion remains generally fixed. - The perspective view of
FIG. 3 shows the interior components of theabdominal exercise device 2 including theupright base 4 and the pivotingupper section 6. Thetelescopic handles 14 include asecuring extension 15 and ahand grip extension 16. Thesetelescopic handles 14 are each received within ahandle support 18 provided on theupper support 24. Theupper support 24 is pivotally secured to thebottom support 22 by apivoting hinge 50. This pivoting hinge forms apivot axis 20 about which theupper support 24 pivots relative to thebottom support 22. Preferably, theupper support 24 and thebottom support 22 are each of a molded plastic to include the handle supports 18 as well as the series of upper torsion bar supports 32 and lower torsion bar supports 34. The torsion bar supports 32 and 34 can be of greater length to provide additional support of the torsion bars such that deflection primarily occurs adjacent thepivot axis 20.Torsion bars 28 are easily inserted and removed from thesupports torsion bars 28 extend across thepivot axis 20 and have a bias to the straight configuration shown inFIG. 3 . Thebars 28 are preferably made of a fiberglass, spring steel or reinforced plastic material. - In
FIG. 4 , the side view shows thetorsion bars 28 being deformed and providing resistance to the pivoting of theupper support 24 relative to thebottom support 22. Threetorsion bars 24 have been shown; however the device can be adapted to include additional bars or bars of varying strengths. In this way, a simple mechanism is provided allowing adjustment of the bias force such that the abdominal exercise device can be appropriately set for different users. Thehandles 14 are also height adjustable within handle supports 18 and are set according to the requirements of the user. Shown in dotted lines inFIG. 3 is the upholstered exterior face of the exercise device indicated as 40. This typically includes a compressible foam cushion portion and a suitable outer fabric portion. The exercise device is typically made to allow access to the back portion of the exercise device, or at least the upper end portion of the exercise device, to allow for convenient replacement of the torsion bars 28. - Details of a preferred pivoting hinge arrangement are shown in
FIGS. 5 and 6 withFIG. 6 also illustrating a pivot limiting lock. The pivotinghinge 50 includes apivot shaft 52 having threadedend portions 54. These threaded end portions receive the upper pivoting lugs 56 and also receive the lower pivoting lugs 58 on the threaded portions. Threaded knobs 60 retain the pivoting lugs on thepivot shaft 52. Other arrangements for forming the pivot axis are also possible. The upper pivoting lugs 56 are shown with alarge gap 55 adjacent thepivot shaft 52. This accommodates pivoting and avoids the compressible foam or upholstered fabric pinching the user. The bottom pivoting lugs could also be of a longer length to avoid this tendency if necessary. - The upper pivoting lugs 56, as shown in
FIG. 6 , includestop projections 57 that engage stop lugs 59 of thelower pivoting legs 58. Thestop projections 57 and the stop lugs 59 cooperate to limit the angle of forward pivoting of the pivotingupper section 6 relative to theupright base portion 4. The preferred maximum angle of rotation is in the range of 30 degrees to 40 degrees. Further rotation is not beneficial and may be counter productive. Although a fixed rotation limiting arrangement is shown it could be adjustable to be varied by the user. - As shown in
FIG. 7 , theabdominal exercise device 2 has thepivot axis 20 at a relatively high position adjacent to generally correspond to the shoulder blade height of the user. This provides a pivoting action of the user at a much higher location than would be the case with respect to a sit-up type exercise. This pivoting exercise of the user at the higher location strengthens the abdominal muscles and also helps alleviate back problems associated with the muscles adjacent the lower portion of the back. The telescopic handles 14 are height adjustable as they telescope within the handle supports 18 of the exercise device. Preferably, the handles also telescope as shown inFIG. 8 , such that thehand grip 16 is of variable length by means of adjusting the first segment 16a relative to thesecond segment 16b. This dual adjustment allows the exercise device to be adjusted to suit different physical attributes of the particular users. In addition, it allows thehand grip 16 to be reduced in length and easily stored across the top of the exercise device. - The
upright base portion 4 is typically placed in a chair, and due to the particular high pivoting action, the user tends to force this upright portion back into contact with the upright portion of the seat. In this way, it is often not necessary to include a strap maintaining theupright portion 4 against the upright portion of the chair. Such a strap can be provided if desired. In one embodiment as shown inFIG. 7 , aremovable seat portion 100 is releasably attached to theupright base portion 4. - An alternate handle embodiment is shown in
FIG. 10 where rope handles 17 have replaced the “L” shaped rigid handles 14. The rope handle 17 includes an adjustable limitingmember 17a that could be a separate slidable lockable member or could be a large knot in the rope handle. The user appropriately adjusts theflexible handles 17 for his physical requirements. There is a preferred position of the user's arms and elbows such that the hands are either side of the user's head and between his shoulders and ears. - The flexible handles avoid the tendency of a user to use leverage and his arms to complete the exercise rather than the abdominal muscles. The arms basically form a force transfer linkage between the pivoting
upper section 6 and the user's abdominal muscles. There should be no significant use of the arms to cause pivoting and the rope handles reduce this possibility. - To use the device, the user positions himself to have his back in contact with the
upright base portion 4 and reaches rearwardly to engage thehandles 14. The user then pulls on the handles to pivot theupper support 24 about thehinge axis 20. Theupright base portion 4 of the abdominal exercise device is maintained in the upright position and remains motionless while providing a lordotic support position (normal lumbar curvature for the user). Therefore, the lumbar spine does not participate in the exercise. This is a fundamental difference, in that many studies over the years have shown that a sit-up/crunch maneuver with flexion at the waist produces a shearing effect on the spinal facet joints and a posterior disc stress (bulging) on the lumbar discs. This device virtually eliminates these stresses, thereby achieving a safer exercise. Another fundamental difference is evidenced in that prior art abdominal devices do not support the lumbar spine in a normal lordotic configuration and do not produce a shortening of the contracting muscles by virtue of flexion at the waist, and do not achieve an overall strengthening of the abdominal musculature through a complete range of motion. - With the devices shown, the user can adjust the resistance required to pivot the
upper support 24 relative to thebottom support 22 by adding additional torsion bars. The pivot point is higher on the user's back, and the forward motion of the user against the resistance exercises (concentrically and eccentrically), the desired abdominal muscles including the rectus abdominus, intertransversaii, internal and external obliques and serratus anterior, while minimizing involvement of the hip flexors. - This abdominal exercise device can advantageously be used with existing chairs, such as office chairs, work station chairs, kitchen chairs, television room chairs, dining room chairs, etc. to allow a user a simple, low cost device for performing a consistent crunch exercise. The device is economical, durable and small in size thereby simplifying storage when not in use. It can remain in one chair indefinitely, as it is contoured as a lumbar support.
- The abdominal and back machine has been shown as being an add-on for use with an existing chair, however it can be appreciated that this exercise device with the retractable handles can be built in as part of a conventional office, desk chair or specialized exercise chair as shown in
FIG. 8 . In this way, particularly for office chairs, a person who is generally performing a desk job can use the exerciser as an add-on device or as an integral device part of his normal chair to perform crunch exercises from time to time. This particular arrangement can be integral with the chair and as such is unobtrusive. The retractable handles and the pivoting point at a raised position on the chair can all be concealed to provide an effective office chair with a pleasing appearance appropriate for normal office requirements. In addition the desired lumbar support is provided. - The particular design of this abdominal exercise device, and in particular, the high pivot axis location, assists the user in isolating the appropriate muscles for strengthening the abdominal area and increasing the core strength of the user. Many exercise devices fail to effectively strengthen these muscles. Typically the
upright base portion 4 is of a height at least two to three times the height of the pivotingupper section 6. - Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art, that variations may be made thereto without departing from spirit of the invention or the scope of the appended claims.
Claims (11)
1. An abdominal exercise device comprising an upright base connected to a pivoting upper section;
said upper section including two pivoting handles adapted to extend forwardly at an upper edge of said pivoting upper section in a perpendicular manner to provide hand grip extensions above the shoulders of a user used to pivot said upper section relative to said upright base;
said upper section and said upright base including a variable bias arrangement adapted to provide a resisting force when said upper section is pivoted forwardly relative to said upright base; and
wherein said upright base is of a length significantly greater than said pivoting upper section such that a pivoting axis between said pivoting upper section and said upright base generally locates said pivoting axis adjacent a lower edge of the shoulder blades of a user.
2. An abdominal exercise device as claimed in claim 1 wherein said bias arrangement includes replaceable torsion rods extending across said pivot axis and secured to said upright base and said pivoting upper section.
3. An abdominal exercise device as claimed in claim 2 wherein said upright base and said pivoting upper section each include at least three securement slots for retaining said replaceable torsion rods.
4. An abdominal exercise device as claimed in claim 3 wherein said upright base and said pivoting upper section each include a molded plastic structural support having said securement slots molded therein.
5. An abdominal exercise device as claimed in claim 4 wherein said replaceable torsion rods are inserted or removed through a top access slot of said pivoting upper section.
6. An abdominal exercise device as claimed in claim 5 wherein said pivoting upper section and said upright base include a common upholstered front face including an inner foam cushion layer.
7. An abdominal exercise device as claimed in claim 6 wherein said upright base and said pivoting upper section each include opposed lugs including a pivoting port for receiving a pivot shaft forming part of said pivot axis.
8. An abdominal exercise device as claimed in claim 1 wherein said hand grip extensions are telescopic and lockable to set a hand grip extension appropriate for the user.
9. An abdominal exercise device as claimed in claim 1 wherein said pivoting handles are movable between a storage position with said hand grip extensions extending across a width of said upright portion at an upper edge thereof to an exercise position with said hand grip extensions generally perpendicular to said pivoting upper section.
10. An abdominal exercise device as claimed in claim 1 wherein said exercise device forms the backrest portion of a chair.
11. An abdominal exercise device as claimed in claim 1 wherein said exercise device forms the backrest portion of an office chair.
Priority Applications (1)
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US12/222,471 US20090048082A1 (en) | 2007-08-14 | 2008-08-11 | Abdominal exercise device |
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US93545007P | 2007-08-14 | 2007-08-14 | |
US12/222,471 US20090048082A1 (en) | 2007-08-14 | 2008-08-11 | Abdominal exercise device |
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US20090048082A1 true US20090048082A1 (en) | 2009-02-19 |
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US12/222,471 Abandoned US20090048082A1 (en) | 2007-08-14 | 2008-08-11 | Abdominal exercise device |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090233773A1 (en) * | 2008-03-11 | 2009-09-17 | David Cardey | Excercise Chair |
US20100298105A1 (en) * | 2008-01-23 | 2010-11-25 | Nir Daniel | Device and method for training abdominal muscles |
GB2520075A (en) * | 2013-11-11 | 2015-05-13 | Tony King Chubwa | A training aid |
US20160199691A1 (en) * | 2015-01-12 | 2016-07-14 | Hoist Fitness Systems, Inc. | Flip and dip handle system for performing dip exercises on an exercise machine |
US10493314B1 (en) * | 2018-03-21 | 2019-12-03 | Andres M. Lujan | Workout apparatus for use with a chair |
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US20080058183A1 (en) * | 2005-02-22 | 2008-03-06 | Younane Paul Peter M | Exercise apparatus |
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- 2008-08-08 CA CA002638582A patent/CA2638582A1/en not_active Abandoned
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US4478413A (en) * | 1980-09-03 | 1984-10-23 | Siwula John T | Torsion type exercise device |
US5453064A (en) * | 1992-07-31 | 1995-09-26 | Natraflex Systems, Inc. | Exercise glove incorporating rods which offer resistance to movement of fingers, hands, or wrists |
US5545114A (en) * | 1995-04-25 | 1996-08-13 | Kor-One, Ltd. | Abdominal exercise device |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100298105A1 (en) * | 2008-01-23 | 2010-11-25 | Nir Daniel | Device and method for training abdominal muscles |
US8113998B2 (en) * | 2008-01-23 | 2012-02-14 | Nir Daniel | Device and method for training abdominal muscles |
US20090233773A1 (en) * | 2008-03-11 | 2009-09-17 | David Cardey | Excercise Chair |
GB2520075A (en) * | 2013-11-11 | 2015-05-13 | Tony King Chubwa | A training aid |
GB2520075B (en) * | 2013-11-11 | 2015-11-11 | Tony King Chubwa | A training aid |
US20160199691A1 (en) * | 2015-01-12 | 2016-07-14 | Hoist Fitness Systems, Inc. | Flip and dip handle system for performing dip exercises on an exercise machine |
US9943721B2 (en) * | 2015-01-12 | 2018-04-17 | Hoist Fitness Systems, Inc. | Flip and dip handle system for performing dip exercises on an exercise machine |
US10532244B2 (en) | 2015-01-12 | 2020-01-14 | Hoist Fitness Systems, Inc. | Flip and dip handle system for performing dip exercises on an exercise machine |
US10493314B1 (en) * | 2018-03-21 | 2019-12-03 | Andres M. Lujan | Workout apparatus for use with a chair |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |