ERGOGRAFYYa (Greek ergon work + graph5 to write, represent) — a method of assessment of level of operability of a human body by registration of its muscular work.
Early studies in the area E. the ital. scientist A. Moss about (1890), the designed special device for record of muscle work of a brush — manual carried out the ergograph.
V. O. Boguslavsky (1891) laid the foundation for studying of influence of emotions and touch stimulation (olfactory, tactile) on muscle performance of the person. A great influence on development E. rendered works of I. M. Sechenov (1903) who showed that efficiency of group of the tired muscles is recovered during active recreation quicker (see. Muscular work). Ergografichesky researches found application in physiology of work, in assessment of stability of a stereotype of labor movements, establishment of necessary duration of micropauses, optimization of work-rest schedules.
There are various modifications of ergographs. Mosso's ergograph is adapted by Paltseva for registration of work of flexor muscles of a long finger of a hand. In Sechenov's ergograph the movements of larger links of a hand coming in character to real labor actions are registered. The examinee during E. shall lift a load in a step to blows of a metronome, every time with a best effort to full exhaustion. On curve record of muscular work (ergogramma) height of separate teeth corresponds to height of lifting of loads. Knowing the sum of heights of all rises and weight of a load, it is possible to calculate the size of work, and knowing a running time — its power.
For record of movements of various muscular groups of a body of the person use special devices — ergometra. The procedure of measurement of characteristics of the muscular work performed by the person is called an ergometriya.
Distinguish the inertial ergometra measuring the size of the work spent for rotary motion of a body of a certain weight, and the gravitational ergometra measuring work on overcoming gravity. In modern a wedge, and a lab. to practice were widely adopted the stationary bicycle, to-ry use for measurement of the work made by the person at rotation of pedals of the motionless bicycle, and tredmilergometr (the thread - is lovely) — for measurement of the work made during the walking or run on a moving path. Controlled variables of ergometrichesky installations are the frequency of rotation of pedals, size of the effort made for pedals, the speed of the movement of a path, a corner of its inclination.
The dosed muscular work on an ergometra with simultaneous electrocardiographic and a wedge, observation allows to define physical effeciency of inspected, to estimate the level of aerobic opportunities of an organism. Considering that power consumption and dynamics of growth of oxygen consumption depend, first of all, on intensity of work, ergometrichesky researches apply to indirect assessment of size of the so-called maximum oxygen absorption (MOA). In a wedge, practician E. it is used, in particular, for identification of the latent and early forms of coronary heart disease, and also control of efficiency of the carried-out medicamentous therapy. In the course of treatment it is possible to define a threshold of portability of this or that exercise stress, exceeding to-rogo leads to development a wedge, and electrocardiographic symptoms of ischemia of a myocardium. Establishment of such threshold allows to give the quantitative characteristic of degree of resistance of the patient to an exercise stress, creates a possibility of reproducibility of results of a research. AA. it can be applied to identification of effect of effect of medicines (quality standard of action) and extent of its manifestation (quantitative assessment). As rather simple and informative method E. widely apply in sports, aviation, clinical and other sections of medicine.
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