Exercise bike having a guided pedaling

Abstract

The invention provides an exercise bike (100) having a guided pedaling, comprising a supporting frame (22) for the supporting on the ground, a seat (20) and a backrest (21) for a user, a front body (101) comprising a carter (102) for a kinematic mechanism of said exercise bike (100), and pedals (5', 5") connected to said kinematic mechanism, the exercise bike (100) is characterised in that said front body (101) further comprises two panels (6', 6") each of which is arranged side by side with said exercise bike (100) in a symmetrical and specular arrangement with respect to said exercise bike (100) and being integrally connected with said supporting frame (22) by means of supporting means (220), the arrangement being such that each pedal (5', 5") of said kinematic mechanism is associated in a sliding and rotating manner with a respective panel (6', 6") by a sliding guiding means (3', 33'', 4) integrally housed in each of said panels (6', 6").

Description

[0001] "EXERCISE BIKE HAVING A GUIDED PEDALING"

[0002] >»X<«

[0003] DESCRIPTION

[0004] The present invention in general concerns equipment for the performing of fitness exercises , and more speci fically it refers to an exercise bike with speci fic structural modi fications of the pedaling dynamics for the exercising the back muscular masses of the pelvis and buttocks of a user .

[0005] State of the art

[0006] As is known, fitness exercise machines called exercise bikes allow the user to simulate the use of a bike for training . Depending on the position of the user during the execution of the exercise , the exercise bike is also defined as vertical or hori zontal .

[0007] Typically, the exercise bike is not equipped with wheels and there are di f ferent versions equipped with accessories and other instruments such as , for example , the odometer or the speedometer, the heart rate monitor, and the indicators for the ef fort , the average and maximum speed, the resistance variators , etc .

[0008] With reference to the calculation of the work ( or consumed power ) by the user during the pedal ing in an exercise bike or generally for a bicycle , the former it is based on the speci fic work made by the leg muscles in the di f ferent phases . In the known exercise bikes , it is usual to roughly distinguish two types of biomechanical phases : the push phase and the dead phase ( i . e . , where there is no push) . In a simpli fied manner, the push phases are related to when the crank arm is parallel to the ground and the dead phases are related to the passage of the crank arm in a position approximately perpendicular to the ground .

[0009] A more analytical approach allows to define in greater detail the moving of the muscles and the power provided by the athlete during the pedaling and through the di f ferent positions assumed by the legs during the pedaling . The pedal actually follows a perfect circumference during its rotation centered about on the shaft of the exercise bike. Therefore, the position of the crank can be considered as the indicator of the angle covered during the complete rotation of the same at 360°. More precisely, considering the highest position of the pedal as 0°, with the crank perpendicular to the ground surface, it is now clear that the phase where the effort that the user must transmit to the pedal is greatest is that related to the sector that goes from 0° to 180°. To optimize the transmission of power, the pedal remains horizontal to the ground, for the entire duration of this phase .

[0010] Pedaling between 0° and 180° with the pedal parallel to the ground, characterizes the maximum expression of power by the user, and mainly uses the force applied by the quadriceps of the leg (the latter goes from a bent condition to an extended one) , and also other muscle sectors of the leg are also stressed - even if to a lesser extent. It should be noted here that in the exercise bikes according to the state of the art, no significant muscular stress and exercise is exerted on the back muscle masses of the pelvis, i.e. the buttocks, or at the base of the torso of the user's body.

[0011] The phase described above is followed by a short transition phase, which corresponds to the angular sector around 180° and wherein the crank is positioned substantially vertical or orthogonal with respect to the ground at the lowest point of rotation about the rotational axis thereof. In this phase, the work changes from pushing to pulling, and the pedal tends to be forward tilted and at a maximum extension of the leg.

[0012] Subsequently, follows a recovery or "dynamic ascent" phase of the foot, which corresponds to the angular sector between 190° and 360° ridden by the pedal / crank, and wherein the user' s leg performs an upward bending or retraction action. It should be highlighted here that, while one foot is pulling on the pedal while rising on one side of the crankset, on the other side the other foot is pushing down on the pedal. Therefore this allows a single crank in the recovery phase to rise during the completion of the pedaling cycle about the rotational axis of the central movement of the exercise bike .

[0013] Finally, a transition phase is provided from traction to pushing that allows a pedaling cycle to be completed . Then the pedal returns to an hori zontal condition : this is the phase wherein the leg bending is greatest .

[0014] It is evident to those skilled in the relevant art that the bikes and / or exercise bikes of the state of the art do not in any way provide for the pos sibility of modi fying the pedaling dynamics , i . e . during the whole rotation cycle of the cranks with the aim of allowing the user to perform muscle exercises particularly aimed at the back muscle masses at the base of the pelvis of the human body, i . e . the buttocks .

[0015] Brief description of the invention

[0016] The obj ect of the present invention is a new apparatus designed for the execution of muscle exercises dedicated to the stimulation of the back muscle masses of the pelvis at the base of the user ' s torso , i . e . the buttocks .

[0017] Another obj ect of the present invention is a new exercise bike that allows the control of the user' s exercise particularly targeted to the back muscle masses at the base of the pelvis , in a simple and ef fective manner at the same time .

[0018] Yet another obj ect of the present invention is a new exercise bike that provides for the optimal positioning of the user thanks to the possibility of performing a combined adj ustment of the di f ferent component sections of the exercise bike .

[0019] A further obj ect of the present invention is a new exercise bike that is made with standard components , materials , and technologies in the field of the sports equipment , in order to make the new exercise bike a low-cost and easy-to-maintain device .

[0020] These and other obj ects will become apparent in the following description of the present invention which provides an exercise bike with a guided pedaling for the exercising of the back muscles at the base of the torso of a user ' s body, the exercise bike comprising a supporting frame , an adj ustable seat , an adj ustable backrest , and is characterised by comprising a pedal mechanism which it can adj ust the user ' s ef fort during the execution of the exercise , the pedal mechanism comprising two cranks mounted on a rotatable central shaft , wherein each crank includes two associated sections telescopically movable one with respect to the other, and elastic means housed inside said two sections , and wherein at the ends of each crank is mounted a supporting shaft for a respective pedal which is mounted on the first in a rotatable manner, and wherein each supporting shaft is parallel to the longitudinal axis of the central shaft of the exercise bike , the exercise bike is further characterised by further comprising two control plates associated with said supporting frame of said exercise bike , each of said control plates is connected to a respective free end of one of said supporting shafts of said pedals , and wherein said free end of said supporting shaft is configured to slide in a sliding guide formed in said associated control plate , the arrangement being such that for each complete revolution of a crank the associated pedal slides inside said guide of a related plate performing a non-circular rototranslatory motion .

[0021] Therefore , the present invention provides an exercise bike having a guided pedaling for the exercising of the back muscles at the base of the torso of a user ' s body substantially according to the appended claims .

[0022] Detailed Description of the Invention

[0023] A detailed description of a preferred embodiment of the exercise bike of the present invention will now be provided, given by way of a non limiting example , with reference to the appended drawings , wherein :

[0024] Figure 1 is a perspective view from above and from one side of the exercise bike of the present invention; Figure 2 is a schematic front elevation view of a portion of the exercise bike according to the present invention;

[0025] Figure 3 is a schematic elevation view of the kinematics of the pedal assembly of the exercise bike according to the present invention;

[0026] Figure 4 is a schematic front elevational view of a component of the kinematics of the pedal assembly of the exercise bike according to the present invention;

[0027] Figure 5 is a schematic elevation and detailed view of the components of the kinematics of the pedal assembly of the exercise bike according to the present invention;

[0028] Figure 6 is a perspective view from one side of a pedal of the exercise bike according to the present invention;

[0029] Figure 7 is a view from one side of the pedal of Figure 6 with a leg and foot of a user and according to the exercise bike of the present invention; and

[0030] Figure 8 is a top plan view of the seat of the exercise bike according to the present invention .

[0031] With reference now to Figures 1 and 2 , the exercise bike of the present invention is illustrated therein in a schematic manner .

[0032] As can be seen from the figures , an exercise bike 100 comprises a supporting frame 22 for the supporting on the ground and a seat 20 and a backrest 21 are made integral to the frame 22 . In front of the seat 20 a body 101 consisting of two panels 6 ' and 6" ( illustrated transparent in the figure for the sake of clarity, ed . ) and a third panel 60 integrally connected to the two panels 6 ' and 6" , the latter are integrally connected to the frame 22 by means of connecting elements 220 . The panels 6 ' and 6" are arranged at each lateral side of the exerci se bike 100 , and each panel 6 ' and 6" is arranged to cooperate with a respective pedal 5 ' and 5" of the exercise bike 100 , the pedal 5 ' and 5" being configured to slide in a guide 4 obtained in each panel 6 ' and 6" (better illustrated here below) .

[0033] The body 101 also comprises a carter 102 which encloses the kinematics of the exercise bike 100 .

[0034] As will be better illustrated and understood below, according to the present invention the panels 6 ' and 6" form part of the kinematics of the exercise bike 100 .

[0035] With particular reference now to f igure 2 , it partially and schematically illustrates the exercise bike 100 from the front and in particular the body 101 .

[0036] According to the invention, the exercise bike comprises the aforementioned panels 6 ' and 6" integrally connected to the frame 22 by means of the connecting elements 220 . Furthermore , a basic mechanism associated with a set of pedals that typically comprises two cranks 2 ' and 2" , each of which comprising a respective pedal 5 ' and 5" rotatably mounted on the relevant crank 2 ' and 2" . Furthermore , each pedal 5 ' and 5" is associated in a sliding and rotatably manner to a respective panel 6 ' and 6" by means of a relevant slider 3 ' and 3" configured to slide inside a guide 4 obtained on each panel 6 ' and 6" ( the guide 4 being illustrated in figure 1 ) .

[0037] With reference now to figure 3 , the kinematics of the exercise bike of the present invention is illustrated therein in a schematic manner .

[0038] According to the present invention, the kinematics comprises a base mechanism 1 ( such as , for example , a flywheel or resistant member, or the like ) which is associated with a rotating shaft 8 . The shaft 8 is associated with the abovementioned two cranks 2 ' and 2" , each of which being mounted on a respective end of the shaft 8 in the manner already known .

[0039] Each crank 2 ' and 2" is constituted by a telescopic structure made up of a couple of box-shaped members (better illustrated below) . According to the present invention, each crank 2 ' and 2" is configured for telescopically extend with respect to its initial length and along its longitudinal axis .

[0040] Furthermore , each end of the crank 2 ' and 2" is associated with a shaft X' and X" having each a longitudinal axis which is parallel to the longitudinal axis of the shaft 8 . Each shaft X' and X" rotatably mounts a respective pedal 5 ' and 5" in the already known manner .

[0041] At each of the protruding ends of each shaft X' and X" a slider 3 ' and 3" is rotatably mounted, respectively . Each slider 3 ' and 3" is associated with a respective sliding guide 4 made integral on each panel 6 ' and 6" , respectively ( the sliding guide 4 being illustrated in figure 1 ) . Furthermore , and as may be noted in the figure , the panels 6 ' and 6" are arranged with a mirror symmetry, transversely with respect to the shaft 8 of the mechanism 1 of the exercise bike 100 . Each panel 6 ' and 6" integrally comprises the guided path 4 which allows the user to pedal in a guided manner according to a predefined cycle of motion (better illustrated below) .

[0042] With reference now to figure 4 , it schematically illustrates the shape of the sliding guide 4 on each panel 6 ' and 6" and the relevant slider 3 ' and 3" associated with a respective pedal 5 ' and 5" ( the latter not illustrated in the figure ) .

[0043] As can be understood from figure 4 , the configuration of the sliding guide 4 is such that during the pedaling the slider 3 ' and 3" and the associated relevant pedal 5 ' and 5" ( the latter not being illustrated in the figure ) performs a portion of path of the sliding guide 4 , the path being shaped as a curved traj ectory 4b and defined at the front region of each panel 6 ' and 6" , and corresponding to the upper part of the pedaling traj ectory up to the lower part of the pedaling traj ectory, and subsequently performs another portion of path of the sliding guide 4 which is shaped as a semicircular traj ectory 4a and defined at the rear region of said panel 6 ' and 6" and starting from the lower part of the pedaling traj ectory up to the upper part of the pedaling traj ectory, the aforementioned paths 4a and 4b being connected by portions of paths defined from A to Al and from A2 to A3 in the figure , respectively, which are shaped as a linear traj ectory of appropriate length . In fact , during the pedaling each slider 3 ' and 3" slides in the guided path 4 of each panel 6 ' and 6" , and the former is expected to impart a rototranslatory motion to the associated pedal 5 ' and 5" . The sliders 3 ' and 3" typically include ball bearings to perform this traj ectory free from signi ficant friction .

[0044] With reference to figure 4 , four macroscopic phases of the pedaling motion are identi fied therein, and foresee a push and a recovery action respectively carried out by the user, each action being distinguished from the other action as follows :

[0045] Phase A-Al

[0046] In this phase the user performs a forward hori zontal push of the leg, with elongation of the elastic element 7" and a crank extension 2" , and wherein the user' s gluteus also plays a signi ficant role .

[0047] Phase A1-A2

[0048] In this phase , the user performs a further extension of the straight leg with an curved motion from top to bottom, characteri zed by the gluteus ' stress and motion, the resisting stress to be overcome being opposed by the brake of the flywheel of the exercise bike 100 . In this phase , the elastic element 7" and the crank 2" remain elongated and follow the curved motion . This motion is achieved by the shape of the pedal 5" which keeps the user' s foot connected to the first (better illustrated below) .

[0049] Phase A2-A3

[0050] In this phase , the user performs a hori zontal recovery but in the lowest area of the pedal stroke , where the elastic element 7 brings the components of the crank 2" back to its original length .

[0051] Phase A3-A

[0052] In this phase the user performs a circular cyclic recovery phase to bring the 5" pedal from the lower to the upper position .

[0053] From the point of view of the muscular stimulation, due to the user' s thrust resulting from the pedaling, the elastic element 7" extends at the middle of the cycle wherein the leg gradually extends, and during the subsequent extension phase at the curved path 4b from top to bottom with the leg already stretched (and where only the gluteus intervenes mainly) , with this motion the relevant muscle i.e. the gluteus is stressed in the extended condition.

[0054] With reference now to figure 5, the components of the kinematics of the exercise bike 100 are illustrated in detail in a front elevation view (and without the carter) and according to the present invention.

[0055] For the sake of clarity, same parts will have same numbers, and the detailed description thereof will be here omitted since already provided previously.

[0056] The basic mechanism 1 of the exercise bike 100 (the latter not illustrated) comprises the rotating shaft 8 which is associated with the cranks 2' and 2" each of which is mounted on a respective end of the shaft 8 in the manner already known.

[0057] Each crank 2' and 2" is made up of a pair of box members 9a' , 9b' , and 9a", 9b", respectively. Each pair of box members 9a' , 9b' and 9a", 9b" is mounted in a telescopic manner and can mutually slide one with respect to the other. Inside each crank 2' and 2" (i.e. each pair of telescopic box members 9a' , 9b' , and 9a", 9b") is enclosed a respective elastic element 7' and 7". Each elastic element 7 ' and 7" can be made of constrained springs, or gas piston, or similar, and is connected at the ends parts of each boxshaped member 9', 9", the arrangement is such that each elastic element 7', 7" exerts a force which is contrary to the telescopic excursion of a respective crank 2 ',2" to which it is associated (better illustrated below) .

[0058] Further, a device 10 ',10" is provided for regulating the force of each elastic element 7', 7", respectively. As will be better illustrated and understood below, each regulating device 10 ',10" is configured to be adjusted by the user in order to make more or less relevant the effort to which the associated crank 2 ',2" can telescopically extend during the execution of the pedaling exercise.

[0059] Furthermore, each end of the crank 2' ,2" is associated with a shaft X' and X", each shaft having longitudinal axis which is parallel to the longitudinal axis of the shaft 8. Each shaft X' and X" rotatably mounts a respective pedal 5' and 5" in the already known manner.

[0060] At each of the protruding ends of each shaft X' and X" the slider 3' and 3" is rotatably mounted, respectively. Each slider 3' and 3" is associated with a respective sliding guide 4 integral to each panel 6' and 6", respectively (the guide being not illustrated in the figure) . Further, the panels 6' and 6" are arranged with a mirror symmetry and orthogonally with respect to the shaft 8 of the mechanism 1 of the exercise bike 100.

[0061] Each slider 3' and 3" is connected to a respective pedal 5' and 5" by means of a respective locking element 12' and 12" on the relevant shaft X' and X" in the already known manner .

[0062] It has to be highlighted here that the device 10 for regulating the load of the elastic element 7' and 7" allows for the generating of a variable force of the elastic element 7' and 7", to which force variation corresponds a greater physical effort of the user during the execution of the exercise .

[0063] It will be evident to those skilled in the art that, according to the present invention, the configuration of the components described above is such that the exercise bike 100 has a double adjustment of the loads onto the kinematics. In fact, in addition to the general load adjustment mechanism applied to the basic mechanism 1 of the exercise bike 100 (which is typically a brake applied to a flywheel, i.e. the mechanical resistance to the user' s work) , it is further provided to apply and / or vary the load of each elastic element 7' and 7" by regulating the adjustment device 10' and 10" to which it is associated, thus allowing a specific control of the effort of the user's gluteal muscles during the execution of the exercise. Figure 5 also refers to a pedaling position wherein it is highlighted how the crank 2' shows an original length with the elastic element 7 ' in its original state, while the other crank 2" is in a extended condition wherein the elastic element 7" is extended against the force exerted on the pedal 5" by the user. In particular, it is clear how the force is exerted by the user onto the pedal 5" for only the half of the pedaling cycle (i.e., at the upper part of the pedaling cycle) , and similarly on the other pedal 5' when the latter is at the upper part of the pedaling cycle (i.e., after 180° of rotation with respect to figure 5) .

[0064] In the subsequent recovery phase where the leg is at the lower zone, the user performs a traction action starting from the point where the foot is at the closest position to the ground. In fact, his action tends to complete the rotation by bringing the foot back to the highest point. Furthermore, the recovery action is aided by the biasing of the elastic element 7' , 7" which tends to bring back the starting static dimension.

[0065] On the other hand, with reference to the complementary behaviour of both legs (i.e., right and left leg) , when one leg is at the recovery phase (i.e., in the lower zone) under the action of the elastic element 7' , 7" pulling to the original length thereof, the effort for the related leg of the user is minimal. In fact, in this condition one leg is at the recovery phase and does not cooperates in the pushing, while the other leg provides the pushing at the upper zone of the pedalling, and moves from a "bended" condition to a "extended" condition of the limb and then of a further stretching extension thereof.

[0066] From the point of view of the stimulation of the muscular masses, when pushing forward with one leg the user is in the condition of fully stimulating the gluteal muscles associated with that leg.

[0067] With reference now to figures 4 and 5, it should be highlighted that the phase A1-A2 the curved shaped 4b of the path 4, corresponds to a position of the leg in the upper area of the pedaling cycle , wherein the leg pushes (by extending the leg ) for a half-cycle to provide a maximum stimulation of the gluteal muscles .

[0068] Therefore , with the aim o f exercising both the gluteal muscles and the muscles related to the lower portion of the user ' s torso , it is preferable to have a pedaling pattern that is no longer harmonic circular as in the pedaling cycle of state-of-the-art exercise bikes , but rather a nonharmonic pattern where a pedaling cycle portion is wider than another portion . More precisely, a pedaling cycle having an upper part that follows a slightly curved motion 4b which is concave downwards and symmetrical with respect to the longitudinal axis of the shaft 8 of the basic mechanism 1 is preferred ( as evident from Fig . 4 ) .

[0069] Furthermore , with reference to f igure 4 , at the lower portion of the pedal ing cycle , it is preferable that the path 4a of the pedal 5" be hal f-circular having symmetry and center coinciding with the longitudinal axis of the shaft 8 of the basic mechanism 1 of the exercise bike 100 . In fact , the hal f-circular path 4a causes the leg to perform a motion related to the recovery phase , a typical motion of the pedaling cycles of the state of the art .

[0070] With reference now to figures 6 and 7 , the shaping of a pedal of the exercise bike 100 according to the present invention is illustrated therein . More precisely, on each of the pedals 5 ' and 5" are mounted shoes 18 ' and 18" , each having a raised heel 19 ' and 19" in order to facilitate the pushing and extension action by the user during the execution of the pedaling cycle ( figure 7 ) .

[0071] With particular reference to figure 7 , when each leg is performing the pedal pushing exercise in a fully extended condition the latter is at the upper pedaling area . According to the present invention, the pedal 5 ' and 5" has a sandal shaped fit 18 (but it could be also a generic shoe shape ) .

[0072] The present sandal fit 18 includes a strap 14 at the front part of the foot , the strap 14 being configured for the holding of the foot onto the sole of the sandal 18 . Further, a strap 15 is provided for the holding of the instep in position . Furthermore , a rear strap 16 is provided both for the holding of the ankle and the blocking of the foot in place . The assembly of the transverse straps 14 , 15 and rear strap 16 allows the foot to stay stable on the pedal during the exercise performed by the user , and in such a manner to precisely transmit the force of the leg / foot directly onto the pedal assembly 5 and the crankset 2 .

[0073] The characteri zing part of this configuration shown in figures 6 and 7 is based on the presence of an additional thickness at the rear area on the sole 19 at the heel level , i . e . a support element which is raised by 4-5 cm with respect to the surface o f the sole 19 . More precisely, given that the foot is stably blocked in the shoe 18 by limiting any play during the execution of the exercise , the support element performs a leverage ef fect to optimi ze the downward thrust in the A1-A2 phase at the upper area of the pedaling cycle ( figure 4 ) . As illustrated, in the abovementioned phase wherein the leg is fully extended and tense and performing a curved shaped motion from the top to the bottom, and while the resistance to be overcome is given by the brake of the flywheel of the exercise bike 100 , the ef fort of the gluteus is actually stimulated, which is the main aim of the present invention . Therefore , the present invention adopts the most appropriate technical solutions to optimi ze the execution of this phase of the exercise .

[0074] With reference now to figure 8 , the seat 20 of the exercise bike of the present invention is illustrated in a top plan view .

[0075] In a preferred embodiment of the invention, an adaptive solution of the position of both the seat 20 and the backrest 21 of the exercise bike 100 is implemented by relating the former to the amount of ef fort that the user wants to increase / decrease during the execution of the exercise , or even before the exercise . In particular, in case the user wishes to increase the load of the elastic element 7 via the adj ustment device 10 of the crank 2 to which it is associated, such increase in load will correspond to a lowering and / or variation of the inclination of the seat 20 and the backrest 21 (by means of a tilting mechanism and / or relative hydraulic device ) through a feedback connection between the regulator 10 and the height and / or inclination regulator of the seat 20 and the backrest 21 .

[0076] As can be seen in figure 8 , the seat 20 is made up of a single structure which comprises a first part S ' having an a substantially ellipsoidal shape when viewed from above , the first part S ' is connected to a second part S" having a narrow and elongated paraboloid shape when viewed from above . More precisely :

[0077] Part S '

[0078] This section of the seat 20 allows the pelvis ( i liac crest , lower part of the spine ) to be comfortably supported and to a minimal extent the buttocks (unlike as occurs in the state of the art exercise bikes ) Part S"

[0079] In this section, the pelvis is stabili zed and a support to the coccyx is provided so as not to rotate the pelvis downwardly during the gluteal contraction phase .

[0080] With this arrangement , the user ' s gluteal muscles will be free to contract and extend the lower limb from the point Al to the point A2 of the guide 4 ( see figure 4 ) . Point A2 of the guide 4 is the area where the maximum extension of the lower limb occurs and it will be lower than the saddle .

[0081] It should be noted here that the seat 20 of the present invention and as illustrated in Figure 8 is made up of a single structured body and not by two interconnected parts .

Claims

CLAIMS1. An exercise bike (100) having a guided pedaling, comprising a supporting frame (22) for the supporting on the ground, a seat (20) and a backrest (21) for a user, a front body (101) comprising a carter (102) for a kinematic mechanism of said exercise bike (100) , and pedals (5' , 5") connected to said kinematic mechanism, characterised in that said front body (101) further comprises two panels (6' , 6") each of which is arranged side by side with said exercise bike (100) in a symmetrical and specular arrangement with respect to said exercise bike (100) and being integrally connected with said supporting frame (22) by means of supporting means (220) , the arrangement being such that each pedal (5' , 5") of said kinematic mechanism is associated in a sliding and rotating manner with a respective panel (6' , 6") by a sliding guiding means (3' , 3", 4) integrally housed in each of said panels (6' , 6") .

2. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein said kinematic mechanism comprises a basic mechanism (1) which comprises a resistant member associated with a rotating shaft (8) , said shaft being connected with a crankset (2' , 2") , each crank (2' , 2") being connected at one end thereof with a respective end of said rotating shaft (8) , and wherein each crank (2' , 2") comprises a telescopic structure made up of box-shaped members, the arrangement being such that each crank (2' , 2") is capable of performing telescopic extensions with respect to the original length thereof and along the longitudinal axis thereof and during the pedaling cycle by a user.

3. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein each crank (2' , 2") has one end connected to a shaft (X' , X") having a longitudinal axis which is parallel to the longitudinal axis of said shaft (8) , and wherein each shaft (X' , X") rotatably mounts a respective pedal (5' , 5") , and wherein a slider (3' , 3") is rotatably mounted at a protruding end of eachshaft (X' , X") , said slider (3' , 3") being slidably associated with a sliding guiding means (4) of a panel of said pair of panels (6' , 6") .

4. Exercise bike (100) having a guided pedaling according to claim 2 or 3, wherein each crank (2' , 2") is made up of a pair of box-shaped members ( 9a' , 9b' , 9a", 9b") , and wherein said pair of box-shaped members ( 9a' , 9b' , 9a", 9b") are mounted in a telescopic manner so that both are slidably arranged one with respect to the other, and wherein inside each crank (2' , 2") an elastic element (7 ’ , 7") is housed and connected to the an end part of each box-shaped member (9' , 9") , the arrangement being such that each elastic element (7 ’ , 7") exerts a force contrary to the telescopic excursion of the relevant crank (2' , 2") to which it is associated .

5. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein said elastic element (7 ’ , 7") is selected from the group comprising: constrained springs, gas piston.

6. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein said elastic element (7' , 7") further comprises a load adjustment device (10' , 10") for adjusting the load of each elastic element (7' , 7") , the arrangement being such that each adjustment device (10' , 10") is configured to be actuated by said user to vary the force required for said associated crank (2' , 2") to extend telescopically during pedaling.

7. Exercise bike (100) having a guided pedaling according to any of claims 3-6, wherein said sliding guiding means comprises a sliding guide (4) integrally housed in each of said panels (6', 6") , and wherein said sliding guide (4) is configured in such a way that during pedalling said slider (3', 3") and the relevant associated pedal (5', 5") performs a first path (4b) of said sliding guide (4) , said first path (4b) having a curved shaped trajectory defined at a front region of said panel (6', 6") and starting from an upper part of said pedaling cycle to a lower part of saidpedaling cycle, and subsequently said slider (3 ',3") follows a second part of a path (4a) of said sliding guide (4) , said second path (4a) having a half-circular trajectory defined at a rear region of said panel (6', 6") and starting from a lower part of said pedaling cycle to a higher part of said pedaling cycle, and wherein the said first and second paths (4a, 4b) are connected by respective paths (A, Al, A2, A3) which have a linear trajectory, and such that during said pedaling cycle each slider (3', 3") slides in said sliding guide (4) of a respective panel (6', 6") and performs a rototranslatory motion of the said pedal (5', 5") associated thereto .

8. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein said sliding guide (4) is configured such that it comprises four parts of path (A, Al, 4b, A2, A3, 4a) , wherein a first part (A, Al) is horizontal and parallel to the ground where said exercise bike (100) rests, wherein a second part (Al,4b,A2) is substantially vertical with respect to the ground and has a curved shape starting from the top to the bottom, wherein a third part (A2, A3) is horizontal and parallel to the ground on which said exercise bike (100) rests, and wherein a fourth part (A3, 4a, A) is substantially vertical and has a halfcircular shape with symmetry and center coinciding with the longitudinal axis of said shaft (8) of said basic mechanism (1) of said exercise bike (100) .

9. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein at said first path part (A-Al) of said sliding guide (4) said user performs a forward push in a horizontal condition of his leg, and wherein an elongation of said elastic element (7' , 7") is caused by the user with a relative telescopic excursion of said crank (2' , 2") .

10. Exercise bike (100) having a guided pedaling according to claim 8 or 9, wherein at said second path part (Al,4b,A2) of said sliding guide (4) said user performs an further extension of the outstretched leg with a curvedmotion from the top to the bottom, and wherein said elastic element (7 ',7") and said crank (2 ',2") are fully elongated to a maximum extension thereof and follow the curved shaped motion .

11. Exercise bike (100) having a guided pedaling according to claim 8 or 9 or 10, wherein at said third path part (A2,A3) of said sliding guide (4) said user performs an horizontal recovery of the leg and at the lower region of said pedaling cycle, and wherein said elastic element (7' , 7") shortens and said crank (2' , 2") telescopically retracts to its initial length.

12. Exercise bike (100) having a guided pedaling according to claim 8 or 9 or 10 or 11, wherein at said fourth path part (A3, 4a, A) of said sliding guide (4) said user performs a half-circular cycling phase to bring said pedal (5' , 5") from the lower cycling position to the upper cycling position, and wherein said crank (2' , 2") does not change its length .

13. Exercise bike (100) having a guided pedaling according to claim 8 or 9 or 10 or 11, wherein at said second path part (Al,4b,A2) of said sliding guide (4) said user performs said path having the leg thereof fully stretched for the entire second part path moving from the top to the bottom, and wherein only the related gluteal muscle is predominantly involved.

14. Exercise bike (100) having a guided pedaling according to any of the preceding claims, wherein said pedals (5' , 5") each comprises a shoe (18' , 18") having a sole and which comprises a heel region (19' , 19") raised with respect to said sole of said shoe (18' , 18") .

15. Exercise bike (100) having a guided pedaling according to the preceding claim, wherein said shoe (18' , 18") comprises a strap (14) arranged at the front part of the user's foot, a second strap (15) arranged for the holding of the user's instep, a rear strap (16) arranged for holding of the ankle of the user's foot.

16. Exercise bike (100) having a guided pedalingaccording to any of the preceding claims 6-15, wherein the actuation of said adjustment device (10', 10") of said crank (2' , 2") by said user, causes a remote adjustment of the height and / or inclination of said seat (20) and of said backrest (21) .

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