ARTICLE INFO ABSTRACT Old age is a process of gradual disappearance of tissue's ability to repair itself or replace itself and maintain its normal structure and function. Degenerative diseases in the elderly for example were hypertension, arthrosclerosis, diabetes mellitus and cancer. This study aims to find out the effectiveness of deep breathing against decreased blood pressure in elderly people who have hypertension. This research uses one group preposttest method. The sample used as many as

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... 13 people. This research uses Purposive Sampling technique and the tool used to obtain data is observation. This study used paired sample t-test with significance α = 0.05. The results of this study showed that there is an influence of deep breathing on the decrease in blood pressure in elderly people who have hypertension on the 1 st day pre and 3 rd day post with a value of p = 0.000<α = 0.05. There is an effect of deep breathing on the decrease in blood pressure in elderly people who have hypertension on the 4th day pre and day 6 post with a value of p = 0.000<α = 0.05. And there is an effect of deep breathing on the decrease in blood pressure in the elderly who have hypertension on the 7 th day pre and the 9 th day post with a value of p = 0.000<α = 0.05. It was concluded that there is an effect of deep breathing on the decrease in blood pressure in elderly people who have hypertension on days 1, 4, 7 pre and day 3, 6, 9 post. The conclusion of the study is that there is an effect of deep breathing effectiveness on the decrease in blood pressure in elderly people who have hypertension the elderly, including hypertension, diabetes mellitus, coronary diseases, stroke, cataracts, and so on. These kinds of health problems that often afflict the elderly are hypertension that can be the complication of various other cardiovascular problems that are more serious. Nowadays, the increase in equality, especially in the field of health, is an important highlight. The onset of various diseases in the community has a huge impact on their lives. One type of disease that continues to develop and increase is hypertension or known by lay people as High Blood. Changes in lifestyle and the needs of the community are considered to have a great influence