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[Evaluation of the effectiveness of health-related improvement in working conditions of postal services employees].

Basing on the physiological and hygienic research performed after a series of prophylactic measures, it was established that the introduction of rational working conditions in combination with physically active rest influences most postively the functional neuro-muscular state of upper extremities in telephone operators and mail sorters, and has a positive bearing on the hemodynamic indices, CNS and regulatory mechanisms status of operators and mail sorters.