A statistic evaluation of the daily blood pressure values at rest during a 4-week period of active training combined with physiotherapy and medical baths indicated a decrease of 20 mm Bg in systolic pressure and of 9 mm Hg in diastolic pressure in patients with hypertension of various grades. The resting blood pressure shows a tendency to become normalized during the course of this therapy with phases of maximum negative decline. However, a standardized simple submaximla ergometric load test carried out weekly demonstrated that there were only minimal changes in systolic and diastolic blood pressure during exercise. In comparison with observations made in other spas, these results demonstrate a uniform reaction of the human organism to this particular form of irritative therapy independent of the particular features of the spas and the special constituents of the waters.