Low back pain affects 70-85% of the population at some point in their lives (Andersson Lancet 1999) with 30% of this group becoming chronic sufferers. Low back pain is the leading cause of disability in individuals under 50 years of age. In 1998, the health care costs associated with low back pain in the United States alone was over $90 billion (Luo Spine 2004).
The spinal column is supported by passive restraints such as the ribs, vertebrae, and joints as well as active restraints such as muscles and tendons. Throughout daily activities and various motions, it is up to these restraint systems to maintain spinal stability. When forces or movements exceed these restraints, the spine's intervertebral motion segments can fall outside of the neutral zone or physiologic threshold, exposing the spine to potential pain, deformity, or neurologic deficit resulting in spinal instability.
The muscles that act upon the spinal segment have the greatest influence on keeping the spine within the safe, neutral zone. There is a global muscle system composed of large torque-producing muscles such as the rectus abdominus, external oblique, and erector spinae that provide general trunk stabilization. However, it is the local muscle system made of the multifidus and transverse abdominus, through their attachments to the lumbar vertebrae, that have the greatest contribution to providing dynamic control to the lumbar motion segments, particularly in the neutral zone.
The lumbar core is comprised of the multifidus muscles and transverse abdominus. The lumbar multifidi are located along the lamina of the vertebrae, spreading caudolaterally to insert onto the mamillary processes. As such, the primary action of the multifidi is not to produce actual rotation, but rather to oppose the flexion effect of the abdominals as they produce rotation. The multifidi act as stabilizers controlling intersegmental motion rather than principal movers of the vertebral column through the previously mentioned counteraction effect.
The transverse abdominus is often referred to as the internal corset of the torso. It is the deepest abdominal muscular layer and raises intra-abdominal pressure when activated (Hansen Spine 2006). Via an agonist-antagonist mechanism, activation of the posterior lumbar musculature (i.e. multifidus) causes transverse abdominus co-activation; this leads to elevated circumferential muscular tone surrounding the lumbar spine, thereby providing increased spinal stability.
The invention relates generally to an exercise machine and methods for strengthening the lumbopelvic complex.
In one embodiment, an exercise machine includes a stationary bench, a rotating bench, a resistance bar, and a load arm mechanism. The stationary bench is substantially parallel to a floor on which the machine is placed, and the rotating bench is capable of rotating at an angle α about an axis located between the stationary bench and the rotating bench. The angle α is about 180 degrees when the rotating bench is substantially parallel to the floor, and a decreases in magnitude as the rotating bench is rotated away from the floor. The angle α ranges from about 90 degrees to about 210 degrees, preferably from about 110 degrees to 200 degrees, more preferably from about 120 degrees to 190 degrees, more preferably from about 135 degrees to 180 degrees.
In another embodiment, the load arm mechanism is capable of providing at least one of linear or rotational adjustment of the resistance bar. The linear adjustment is capable of providing about 8 inches to about 34 inches, preferably about 10 inches to about 30 inches, more preferably about 12 inches to about 28 inches, more preferably about inches to about 26 inches of adjustment of the resistance bar. The rotational adjustment is capable of providing at least about 180 degrees of adjustment of the resistance bar.
In another embodiment, the resistance bar is capable of adjusting the amount of force required to move the resistance bar away from the rotating bench. The resistance means includes at least one of a weight stack, a resistance band, a guided weight resistance, or a friction-based resistance.
In another embodiment, the exercise machine may include one or more suspended slings attached to the machine. The exercise machine may also include at least one inflatable hemisphere disposed on the stationary bench or the rotating bench. The exercise machine may also include at least one swivel platform attached to the stationary bench or the rotating bench.
In another embodiment, the material of the exercise machine includes metal, plastic, wood, PCV, or steel.
In another embodiment, a method of using an exercise machine including a stationary bench, a rotating bench, a support structure attached to the stationary bench and the rotating bench, a resistance bar, a load arm mechanism attached to the support structure to provide linear and rotational adjustment of the resistance bar, and a resistance means to adjust the amount of force required to move the resistance bar away from the rotating bench, and where the method includes performing at least one of a plank, a side plank, a bird-dog, a superman, a lumbar extension, a glute bridge, a single leg raise, a dual-leg raise, a bent leg raise, or a resisted push-up.
In another embodiment, the method includes a resistance means including at least one of a weight stack, a resistance band, a guided weight resistance, or a friction-based resistance.
In another embodiment, the method is performed while at least one inflatable hemisphere is disposed on the stationary bench or the rotating bench. The method is performed while one or more swivel platform is attached to the stationary bench or the rotating bench.
All combinations of the concepts below (provided such concepts are not mutually inconsistent) are part of the inventive subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are part of the inventive subject matter disclosed herein. The terminology used herein that also may appear in any disclosure incorporated by reference should be accorded a meaning most consistent with the particular concepts disclosed herein.
The skilled artisan will understand that the drawings primarily are for illustrative purposes and are not intended to limit the scope of the inventive subject matter described herein. The drawings are not necessarily to scale; in some instances, various aspects of the inventive subject matter disclosed herein may be shown exaggerated or enlarged in the drawings to facilitate an understanding of different features. In the drawings, like reference characters generally refer to like features (e.g., functionally similar and/or structurally similar elements).
In General
An exercise machine as disclosed herein can be used to train the low back core musculature and lumbopelvic complex. The exercise machine can also be used to provide stability to the lumbar spinal column. The exercise machine can be used to train the lumbopelvic core muscles and progressively improve their strength through the use of added resistance. The exercise machine can allow the user to simulate a variety of core strengthening exercises including a plank, a glute bridge, a bird-dog, a leg raise (single-leg or dual-leg), or other exercises that target the core muscles.
Components of the Exercise Machine
The stationary bench 101 provides a stable base for the user of the exercise machine 100. In one embodiment, the stationary bench 101 is substantially parallel to the floor on which the machine is placed. Preferably, the stationary bench 101 is elevated from the floor on which the machine is placed. The stationary bench 101 may be fixed using a support structure 103. The stationary bench 101 may have a padded top surface.
The rotating bench 102 is rotatable at an angle α relative to the stationary bench 101. The rotating bench 102 may have a padded top surface. The angle α provides rotation about an axis located between the stationary bench 101 and the rotating bench 102. The angle α of the rotating bench 102 relative to the stationary bench 101 can be adjusted. For example, when both the rotating bench 102 and the stationary bench 101 are substantially parallel to the floor, a is equal to about 180 degrees, as shown in
The load arm mechanism 104 includes a fixed plate 107, a rotating plate 108, and a concentric square tube 109, as shown in
The distance between the axis of rotation of the rotating bench 102 and the center of the rotating plate 108 can be between 12 inches and 24 inches, preferably between 14 inches and 20 inches, and more preferably between 16 inches and 18 inches.
The size of the exercise machine can be adjusted in length and/or width as necessary to accommodate user sizes and/or space constraints. The load arm mechanism 104 can be adjusted in both length and height, providing at least one of linear or rotational adjustment of the attached resistance bar 106. The rotating plate 108 can rotate freely and can be pinned into fixed positions at about 5 degrees, or about 10 degrees, or about 15 degrees, or about 20 degrees, or about 25 degrees, or about 30 degrees, or about 35 degrees to allow for angular adjustment of the load arm mechanism 104. The rotational adjustment can provide at least about 180 degrees of adjustment of the resistance bar 106. The rotating plate 108 can rotate up to 360 degrees, or at least 300 degrees, or at least 240 degrees, or at least 180 degrees, or at least 120 degrees, or at least 90 degrees, or at least 60 degrees, or at least 45 degrees. In order to accommodate a user at any angle of the rotating bench 102, the amount of angular adjustment of the load arm mechanism 104 is at least equal to, but preferably greater than, the amount of adjustment of angle α of the rotating bench. Preferably, the load arm mechanism 104 can be adjusted over a greater range of angles than the rotating bench can rotate. For any given a, load arm mechanism 104 is be adjustable to accommodate users of different size. Moreover, the load arm mechanism should be adjustable to accommodate the different exercises that are performed at each different a of the rotating bench. The minimum linear adjustment (
Rotation of the load arm mechanism 104 allows for optimal placement of the resistance bar 106 against the user. The resistance bar 106 can be adjusted to account for the exercise being performed and for individual anthropometry. The load arm mechanism 104 can have a ratcheted system to move the resistance bar 106 closer to or farther away from the user when desired. The resistance bar 106 can be modified to consist of a belt, strap, or other mechanism capable of applying external load. The resistance provides a means to adjust the amount of force required to move the resistance bar 106 away from the rotating bench 102. The load arm mechanism 104 can also be removed to use the bench alone for basic exercises without externally applied load or resistance.
The weight stack 105 externally applies load to add incremental resistance when performing the exercises. The weight stack weighs about 260 pounds to 310 pounds, preferably about 270 pounds to 300 pounds, more preferably about 275 pounds to 290 pounds, and particularly about 285 pounds. Depending on the design of the weight stack, the user can have zero weight selected. The resistance may be increased or decreased by 1 pound, or 2.5 pounds, or 5 pound, or larger increments. For example, the resistance may be increased in 1 pound, or 2 pound, or 2.5 pound, or 5 pound, or 10 pound, or 15 pound, or 20 pound, or 25 pound, or 50 pound increments depending on the weights used in the weight stack. As the user trains the lumbopelvic core musculature, this additional resistance will help further strengthen and hypertrophy the intended muscles. Resistance can be added through various means including but not limited to a weight stack, resistance bands, guided weight resistance, friction-based resistance, or another tool used to increase resistance.
The load arm mechanism 104 and resistance bar 106 employ an elliptical cam with a major axis of about 12 inches to 20 inches, preferably about 14 inches to 18 inches, more preferably 15 inches to 17 inches, and particularly about 16 inches. The minor axis of the elliptical cam is about 10 inches to 18 inches, preferably about 12 inches to 16 inches, more preferably 15 inches to 13 inches, and particularly about 14 inches. The mechanical advantage is a function of the ratio between pulley/cam radius, and load arm radius. The weight stack weighs about 260 pounds to 310 pounds, preferably about 270 pounds to 300 pounds, more preferably about 275 pounds to 290 pounds, and particularly about 285 pounds. Table 1 lists the force and weight on the load or swing arm at various positions. The dynamic load analysis in Table 1 assumes that a 30-degree stroke is executed at constant acceleration over 0.5 seconds. The force ranges of Table 1 depend on the angle of the applied force relative to the axis of the load or swing arm.
The resistance bar 106 can be vertically adjusted to allow for the user to position oneself beneath it. Alternatively, a ratcheted pull-down and release system may facilitate the vertical adjustment of the resistance bar 106. The ratcheted pull-down and release system would lower the resistance bar 106 until secure and then release the resistance bar 106 once pressed. The user would be able to pull load arm mechanism 104 down and lock it in incremental positions as it is lowered. This would more easily bring the resistance bar 106 to the desired start position of each exercise. A lever or pull cable would then allow the user to release the pawl and lift the resistance bar 106 to clear it out of the user's way. The ratcheted pull-down and release system may be beneficial if someone is using exercise machine 100 without any help or supervision or to simply adjustments for a variety of users. The ratcheted pull-down and release system mechanism is shown in
Various accessories and/or modifications can be combined with the exercise machine to allow for modifications in training techniques. These accessories and/or modifications can add varying levels of difficulty as a user becomes more skilled at the basic exercises and techniques, thereby increasing muscular activation of the lumbopelvic core complex. The modifications and accessories disclosed herein can be used to perform a plank, a side plank, a bird-dog, a superman, a lumbar extension, a glute bridge, a single leg raise, a dual-leg raise, a bent leg raise, a resisted push-up, or any other exercise used to train the lumbopelvic core complex.
The exercise machine 100 can be modified to include a sliding platform 401 attachment. The sliding platform 401 can be placed on either end of the exercise machine 100. With the sliding platform 401, the user can place one's feet on the sliding platform 401, drawing in or away the lower extremities, thereby adding a dynamic component to the exercises performed on the exercise machine 100, such as a plank exercise as shown in
The exercise machine 100 can be modified to include a sliding a swivel platform 501 attachment. The swivel platform 501 can be placed on either end of the exercise machine 100. With the swivel platform 501, the user can place one's feet on the swivel platform 501 (shown in
The exercise machine 100 can be modified to include a suspended sling 601. The user can position one or two extremities within the sling 601. Two vertical posts 602 with a height-adjustable crossbar 603 can be added to the exercise machine 100 so as to attach the suspended sling 601 as shown in
The platform of the exercise machine 100 can be made unstable by adjusting the stationary bench 101, a rotating bench 102, or the support structure 103. The stability can be adjusted to be either immobile and secure or unstable. The exercise machine 100 can be fixed to the ground or other stable support structure to enforce stability. The exercise machine 100 can also be unfixed to allow for varying degrees of instability or wobbliness. At least one inflatable hemisphere can be disposed on at least one of the stationary bench 101 or the rotating bench 102. For example, the inflatable hemisphere can be a BOSU® ball. The platform of the BOSU® ball or inflatable hemisphere may be placed on the stationary bench 101 or on the rotating bench 102, and the user places his or her feet, back, or forearms on the ball. The degree of instability or wobbliness may be adjusted by varying the amount of air pressure inside the bladder of the BOSU® ball or inflatable hemisphere. As a result of the diminished stability from the user's fixation points to the exercise machine 100, greater trunk and core coordination is required with this technique.
The exercise machine 100 can be made of any material capable of withstanding a sufficient amount of force and load from added resistance and to prevent rotation of the apparatus. The material may include but is not limited to metal, plastic, wood, or PVC. The material is preferably steel-based to allow for substantial durability.
Methods of Using the Exercise Machine of Example 1
The exercise machine 100 of Example 1 can be used to train the lumbopelvic core muscles by allowing the user to simulate a variety of core strengthening exercises including, but not limited to, a plank, a side plank, a glute bridge, a bird-dog, a superman, a lumbar extension, a leg raise (single-leg, dual-leg, or bent leg), a resisted push-up, or other exercises specifically used to target the core muscles. The user is able to progressively improve their strength through the use of added resistance. The resistance means comprises at least a weight stack, a resistance, band, a guided weight resistance, or a friction based resistance. The exercises may be performed with the exercise machine 100 substantially parallel to the ground and fixed to the ground. The exercises can be performed by varying the angle α of the rotating bench 102. Alternatively, the exercises may be performed where at least one of the stationary bench 101 or the rotating bench 102 is positioned on at least one inflatable hemisphere. The exercise machine 100 of Example 1 simulates the most effective exercises to strengthen these muscles by means of a guided exercise machine as described herein.
A plank exercise engages the core, strengthens the transverse abdominus muscle, and creates the flat abdominal appearance that many seek to attain aesthetically.
The rotating bench 102 can be vertically adjusted to allow for the user to perform a modified plank.
The exercise machine 100 of Example 1 can also be used to perform a side plank.
The exercise machine 100 of Example 1 allows for additional resistance to be applied using the resistance bar 106 and weight stack 105. Different additions or attachments can be added to the exercise machine 100, including but not limited to a leg sling, a rotating stability platform, a weight stack, or a resistance band to allow for additional modifications of the plank exercise.
A glute bridge exercise strengthens not only the gluteal muscles, but also core muscles, including the multifidus, transverse abdominus, and pelvic floor muscles. To perform a glute bridge, the user lies on his or her back with the hips and knees flexed. He or she then elevates the hips/pelvis off the floor while keeping the feet and shoulders/posterior torso on the bench or ground. The user then returns to the start position.
The rotating bench 102 can be vertically adjusted to allow for the user to perform a modified glute bridge.
A “bird-dog” exercise is effective at targeting the lumbar multifidus muscles. To perform a bird-dog, the user starts in the four-point kneeling position with both knees and hips flexed to 90 degrees. The user then flexes one shoulder and simultaneously extends the contralateral knee and hip, translating the swing arm vertically. The user holds this position for several seconds, then returns to the starting four-point kneeling position and then repeats the motion with the contralateral upper and lower extremities.
Several leg raise exercises engage the core musculature, build hip flexor strength, and help define the anterior abdominal muscles. These are often performed in fitness facilities as a “hanging” exercise where one holds onto a pull-up bar or braces the forearms on pads, suspending the body while performing the exercise. The exercise is often limited by one's ability to hold oneself in such challenging positions. The exercise machine 100 of Example 1 allows the user to perform these exercises on one's back. The user is shown on the exercise machine 100 performing a single straight leg raise at the starting position (
The exercise machine 100 of Example 1 can also be used to perform a push up with resistance (i.e., a resisted push-up).
Components of the Exercise Machine
A modified exercise machine 400 is shown in
A front guide rail 17 and a back guide rail 16 can be attached to the front base 8 or back base 1, respectively. The guide rails are attached using front and back slide brackets 13, 3. The slide brackets are slightly wider than the base upon which they sit. The slide brackets are secured to the bases via locking pins 11 transfixed through machined holes in the brackets and bases. This provides stability to the bracket and guide rail mechanism. Length adjustments can be made by moving the slide brackets in either direction along the bases. This allows for the base to be adjusted in between about 5 inch and 15 inch increments or holes. Preferably each increment or hole is between about 1 inch to 2 inches. In one embodiment there are 10 holes and each hole is spaced about 1.5 inches from the next nearest hole. In another embodiment the holes are about 1 inch or about 2 inches from the next nearest hole. The front base 8 and back base 1 can be between 12 inches and 24 inches, preferably between 14 inches and 20 inches, and more preferably between 16 inches and 18 inches
The front guides rails are offset laterally via front a lateralizing rod 9 extending from the front slide bracket 13. This allows for a more natural position/spacing of the user's upper extremities, i.e. close to the user's biacromial distance, against the front rollers 10. Similarly, the lateralizing rod 9 prevents interference from the user's head, which may need to be positioned between the two front guide rails 17, depending on the angulation through the front pivot lock 18.
Encircling the front and back guide rails 17, 16 are front and back slide guides 15, 5 that allow for smooth translation along the guide rails. The slide guides contain roller(s) 10, 6 and a resistance platform. The roller(s) 10, 6 projects laterally from the slide guides 15, 5, allowing the user to position an extremity against the roller(s) 10, 6 for comfort. This roller 10, 6 rotates about a central axis facilitating movement along the user's extremity. The resistance platform is at the distal end of the slide guide and allows for placement of weight plates to rest on the resistance platform, thereby permitting additional resistance as desired by the user. The resistance can be modified to consist of a belt, strap, or other mechanism capable of applying external load.
Detail A of
Methods of Using the Exercise Machine of Example 2
The exercise machine 400 of Example 2 can be used to train the lumbopelvic core muscles by allowing the user to simulate a variety of core strengthening exercises including, but not limited to, a plank, a glute bridge, a bird-dog, a leg raise (single-leg or dual-leg), or other exercises specifically used to target the core muscles. The user is able to progressively improve their strength through the use of added resistance. The exercise machine 400 of Example 2 simulates the most effective exercises to strengthen these muscles by means of a guided exercise machine as described herein.
All parameters, dimensions, materials, and configurations described herein are meant to be exemplary and the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the inventive teachings is/are used. It is to be understood that the foregoing embodiments are presented primarily by way of example and that, within the scope of the appended claims and equivalents thereto, inventive embodiments may be practiced otherwise than as specifically described and claimed. Inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein.
In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the inventive scope of the present disclosure. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions and arrangement of respective elements of the exemplary implementations without departing from the scope of the present disclosure. The use of a numerical range does not preclude equivalents that fall outside the range that fulfill the same function, in the same way, to produce the same result.
Also, various inventive concepts may be embodied as one or more methods, of which at least one example has been provided. The acts performed as part of the method may in some instances be ordered in different ways. Accordingly, in some inventive implementations, respective acts of a given method may be performed in an order different than specifically illustrated, which may include performing some acts simultaneously (even if such acts are shown as sequential acts in illustrative embodiments).
All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.
All definitions, as defined and used herein, should be understood to control over dictionary definitions, definitions in documents incorporated by reference, and/or ordinary meanings of the defined terms.
The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”
The use of the word “between” in connection with two values is intended to be construed as including the two values.
The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, a reference to “A and/or B”, when used in conjunction with open-ended language such as “comprising” can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.
As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above. For example, when separating items in a list, “or” or “and/or” shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as “only one of” or “exactly one of,” or, when used in the claims, “consisting of,” will refer to the inclusion of exactly one element of a number or list of elements. In general, the term “or” as used herein shall only be interpreted as indicating exclusive alternatives (i.e. “one or the other but not both”) when preceded by terms of exclusivity, such as “either,” “one of,” “only one of,” or “exactly one of.” “Consisting essentially of,” when used in the claims, shall have its ordinary meaning as used in the field of patent law.
As used herein in the specification and in the claims, the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, “at least one of A and B” (or, equivalently, “at least one of A or B,” or, equivalently “at least one of A and/or B”) can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of” and “consisting essentially of” shall be closed or semi-closed transitional phrases, respectively, as set forth in the United States Patent Office Manual of Patent Examining Procedures, Section 2111.03.
The present application claims a priority benefit to U.S. provisional application Ser. No. 62/938,513, filed on Nov. 21, 2019 entitled “EXERCISE MACHINE AND METHODS OF USE FOR STRENGTHENING THE LUMBOPELVIC COMPLEX,” which is incorporated herein by reference in its entirety.
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