[Physiological, psychological and ergonomic research on jobs in the manufacture of chocolate products].

The investigations include job description and analysis of the activity, functional examinations of basic dynamometric indices (muscle strength and endurance of static effort), the pulse rate and the time of carrying out of one operation and for manufacturing of unit product. Psychological tests for subjective evaluation of the stress and monotony, the type and rate of vertigo, of the psychic status in the presence of monotony, are applied. The ergonomic analysis comprises evaluation of the work place work posture and equipment. The results of the investigations point out that the activity of the basic professions in this production is expressed monotonous, with significant static load of the muscle system and total hypokinesia and hypodynamia. Changes in the working capacity and fatigue are registered in the middle of the working day as well as disturbances in the neuro-vegetative and adaptation mechanisms of the organism and appearance of unfavourable psychic conditions (decreased vigilance, boredom, satiating). Ergonomic incongruities were found in the dimensions and the order of the working place and equipment.