the apparatus pursuant to fig1 consists substantially of a housing 1 of an air - tight design in which an exercise bicycle 2 is arranged consisting of pedals 3 , a drive belt 4 and a flywheel 5 which is braked by a braking apparatus not shown in detail . a seat 6 is provided for the person actuating the apparatus . the flywheel 5 and braking apparatus provides a resistance to the treading motion of the legs of the user . moreover , a vacuum pump 7 is arranged in the housing , which pump discharges air from the interior of the housing 1 through an opening 8 to the outside . an opening 9 is arranged in the upper zone of the housing 1 for tight enclosure of a user &# 39 ; s waist area , the opening being defined by two displaceable lid portions 10 a , and 10 b which are sealed off with respect to the housing 1 by means of seals 11 and sealing elements 12 a , 12 b on the upper side of the lid portions 10 a and 10 b which are made up of rubber so as to sealingly enclose the waist of the person actuating the apparatus . the lid portions 10 a , 10 b are pushed apart in order to allow the entry into the apparatus from above . alternatively , there can also be arranged an entrance opening on the side or the housing may be entirely arranged in two parts in order to allow a particularly simple entry into the apparatus . thereafter , all openings are closed in order to ensure an air - tight occlusion of the inner chamber of the housing 1 from the outside environment . the sealing elements 12 a , 12 b should enclose the test person &# 39 ; s waist as tightly as possible . thereafter a predetermined pressure below atmospheric is produced in the interior of the housing 1 by means of the vacuum pump 7 . it is obvious for the man skilled in the art that this pressure below atmospheric is regulated accordingly and is adjustable according to the respective needs . in an alternative embodiment , it may not only be provided that air is sucked off via the vacuum pump 7 , but that also in a well - defined manner air is supplied from the ambient environment in order to produce predetermined climatic conditions such as temperature , humidity and the like in the interior of housing 1 . this is not shown in the present figures . the embodiment of fig3 is distinguished from the embodiment of fig1 in that a pump 7 a is arrange outside of box 1 and is connected with the same via a line 8 a . this allows reducing the operating noise of the apparatus . the pump is provided with a design that allows changing over so as to produce both a pressure below atmospheric and a pressure above atmospheric in box 1 . a stepper 2 a is arranged in box 1 , which stepper is actuated by the indicated test person 20 . an air valve 14 and a barometric measuring device 15 for the pressure within the box are provided on the upper side of the box . a door 13 is arranged at the front side of the box 1 for entering the apparatus . the seat 6 a is vertically adjustable via rotation of threaded support 6 b , and the waist of a person using the apparatus is surrounded by a sealing ( closure ) means 12 c . the apparatus as shown in fig4 – 6 comprises a housing 101 encompassing a main chamber 102 in which a seat 103 is arranged on a shifting rail 104 . furthermore , a working means in the form of a room bicycle 105 is arranged in the main chamber 102 , the room bicycle being drivable by an electromotor 106 . operating openings 111 that can be locked in an air - tight manner for instance enable to attach the legs of a person , that is handicapped in moving , from the outside to the pedals of the room bicycle 105 . a box 107 is connected to the chamber 102 , which includes a vacuum pump — not shown in detail — and a control means for controlling the additional functions that will now be described . air can be sucked off via an opening 108 in order to generate a vacuum . a further opening 109 serves for air conditioning , i . e . in particular for cooling the main chamber 102 and for adjusting the air moisture . light sources 110 serve for irradiating the legs of the person using the apparatus . magnetic coils 112 are provided for building up a therapeutically advantageous magnetic field in the area of the person &# 39 ; s legs . an entry door 113 opening towards the bottom enables an easy access into the apparatus . the entry door 113 is arranged in the area of the opening 108 . in the unfolded state it may be provided that the entry door in the area visible in the unfolded condition has elevations that may be used by the person using the apparatus as a stairway , which enables an easier entry . as may in particular be seen from fig6 , it is possible to lift disables persons by means of an entry help in the form of a crane 114 into the apparatus . in this case the person is indicated by reference numeral 115 . a further chamber 116 is arranged above the main chamber 102 , said further chamber being formed by a cylindrical extension 117 . an opening 118 is formed in the area of the transition of the housing 101 to the extension 117 , said opening having a sealing collar 119 through which the chamber 102 is sealed against the person 115 in the area of the hip . the sealing collar 119 can be provided in the form of panties having two openings for the person &# 39 ; s legs . a further sealing collar 120 serves for sealing the further chamber 116 against the body in the upper portion of the thorax . a further magnetic coil 121 is provided to generate a magnetic field in the thorax area . the further chamber 116 cannot only be loaded by pressure separate from the main chamber 102 , but it can also be ventilated separately and has its own light sources . handles 122 serve for supporting the person and for accommodating a display unit 123 . in fig7 a person 124 is shown , who attaches the legs of a person 115 at the working means 105 through operating openings . in particular in case of disabled people , it may prove to be especially advantageous if the working means is provided with foot attachments so that the feet are held at the working means . as shown in fig8 , a first line 120 leads out of the main chamber 102 and a second line 121 leads from the further chamber 116 to a first or second pressure control valve 122 , 123 . a vacuum pump 124 is arranged at the downstream side of the pressure control valves 122 , 123 to evacuate the chambers 102 and 116 . a control means 125 controls the pressure control valves 122 , 123 and the vacuum pump 124 . in this manner , the respective desired pressure is set in the chambers 102 and 116 . the embodiment shown in fig9 differs from that shown in fig8 in that an independent vacuum pump 124 a and 124 b is provided for each chamber 102 and 116 , the vacuum pumps being separately driveable by the control means 125 . a further embodiment of the invention is shown in fig1 to 14 . the apparatus shown in these figures is a training apparatus that is to be used by the respective person in a lying position . in the description of the drawings the same components are designated by the same reference numerals as in fig4 to 9 . the apparatus shown in fig1 consists of a housing 101 which encompasses a main chamber 102 . a working means in the form of a room bicycle 105 is arranged within this main chamber 102 . the housing 101 is arranged in such a manner that the opening 108 is located at the side of the housing so that the opening encompasses the person using the apparatus in a lying position . a lounger means 130 extends into the housing through the opening 108 . the lounger means 130 can be moved to different positions within the housing via a frame 131 having a lock element arranged within the housing and extending through the opening 108 out of the housing 101 and which engages the lower side of the lounger means 130 . this configuration allows an adaptation of the area of the body that is exposed to the pressure . if the lounger is placed in the leftmost position in fig1 , the pressure acts only on the legs and the buttock ; if the lounger is placed in the rightmost position , the pressure , in addition to acting on the legs , acts also on the abdomen and the hips . the work - out device 105 is supported by supporting means that allow an ergonometric adjustment to the person irrespective of the position of the lounger . thus , the position of the lounger may be adjusted independently of the body proportions of the person using the device . a seat 103 is arranged on the lounger 130 , which is formed as lock , element and which in case of use is located between the legs of the person . in order to take the different body sizes of the training persons into account , the seat is preferably displaceably arranged on the lounger . the seat on the lounger prevents the person from being pulled into the housing during the vacuum phase . in order to enable an easier entry , the device , as shown in fig1 , may easily be unfolded into two half shells , wherein the two half shell elements 132 and 133 are separated from one another in the area of the opening 108 . fig1 shows the apparatus when used . in this view , a person is lying on the lounger 130 , and the lounger 130 has been adjusted to the desired position within the housing . the person is , as already mentioned , on the one hand supported by the seat 103 . the person is further secured by supports 135 on the lounger 130 , wherein the supports are arranged above the shoulder of the person to be treated . these supports are in particular necessary when the lounger is tilted from the horizontal position into another position , as for instance shown in fig1 . during cycles of high pressure , the shoulder supports keeps the person from being pushed out of the apparatus . the lounger is configured in such a way that it can be brought into any tilted position up to the vertical position during exercise . the shoulder supports 135 and the seat 103 from support means for the body of the person using the apparatus . these supports means maintain the body in the selected common relative to the work - out means 5 . a control unit 134 is arranged outside the housing , and can either be operated by the training person itself or by an assisting person . for this purpose , the control unit 134 is provided with an arm - like folding mechanism to move it into different positions . in fig1 , it is also seen that , due to the jointed arm - like mechanism the person in the device can place the terminal 134 in such a manner that it is easily accessible . to seal the person against the opening and against the lounger , it may be provided that the person puts out an inflatable inner ring outside the housing , said ring being put on in the non - inflated condition , and which is inflated after taking the final position on the lounger . it is also possible that the person puts on a vacuum cover , which takes the sealing role . it is especially advantageous if various seals cooperate to realize a complete sealing of the lounger 130 against the opening 108 and the person against the lounger 130 and the opening 108 . in this case , the area between the lower side of the lounger means 130 and the portions of the opening 108 encompassing same can be sealed by a separate sealing means . the modular structure of the apparatus of fig1 to 14 can be derived from fig1 . the modular structure enables a fast and flexible adaptation to various training situations . the modular structure allows also easy transport and easy maintenance . the training apparatus includes as a first module the adjustable lounger device comprising the lounger or rest 130 and the frame 131 as well as the shoulder support 135 and the seat 103 . the seat and the shoulder support are longitudinally displaceably arranged on the lounger 130 . the frame 131 is substantially stationary , whereas the lounger 130 on which the body rests during training is movable with respect to the frame 131 , and , as stated above , can be adjusted in height , length and inclination and can be easily removed for cleaning purposes . for adjustment , the lounger comprises adjustable feet 150 having rollers 151 . on its upper side , the frame is provided with latches 152 , which engage into corresponding counter - latches of the lounger 130 and which fix it in a certain longitudinal position . interchangeable working devices 105 a , 105 b , 105 c are provided as a second module , which can all be operated in lying position . fig1 shows a stepper 105 a , a bicycle trainer 105 b and an ellipsoidal trainer 105 c . the working devices 105 a – c are displaceably supported at an adjustment means in the form of a rail 146 . the working devices 105 a – c all comprise data and signal transmission means which can be connected to the control means . moreover , the working devices 105 a – c may optionally provided with an electromotor . a further module is the control means or the terminal 134 , respectively . the supply unit 155 is a further module . the devices for the air conditioning control , e . g . an air conditioning system 156 , as well as a pump 157 for generating a vacuum or overpressure in the chamber 102 are stored in the supply unit . the supply unit 155 consists of a housing , which has a sound encapsulation so that as few noise as possible is generated during operation in rehabilitation or fitness centers . the housing forms the last module , which is structured as stated above . the housing 101 rests on a frame 160 adjustable in height that is anchored on the ground . due to the modular structure , the apparatus of fig1 to 14 can be converted from a device for training in lying position into a device for training in sitting position as shown in fig4 to 7 by exchanging only a small number of elements . also , the modular structure allows for the manufacturer to tailor the apparatus exactly to the needs of a costumer . in an embodiment that is especially advantageous in this respect , the housing is designed in a manner that it can be used for training in lying and in sitting position . for this purpose the opening must merely turned upwards after the lounger was removed and replaced by a seat . the apparatus shown in fig1 to 15 can , as well as the device shown in to fig4 to 9 , be equipped with additionally integrated magnetic coils , air conditioning means or light irradiation means . in the apparatus , overpressure as well as a vacuum can be regularly or steplike raised or lowered over a predetermined period of time . in the various phases of treatment , an interval circuit switches the overpressure or vacuum in different periods of time on or off , respectively . overpressure and vacuum may change with one another in one phase of treatment . overpressure and vacuum may be controlled manually and automatically . regarding the automatic control , it may be provided that this control is calculated on the basis of the heart rate or the blood pressure of the person to be treated , or on the basis of the temperature behavior in the vacuum chamber or at the surface of the skin of the training person or on the basis of the resistance of the ergometer . the present invention enables to realize an training and a therapy adapted in an improved way to the particularities of the respective person .