The effect of swimming on plasma anp concentration in icrease and control of mind essential hypertension among middle-age men

Por: A. H. Habibi.

Athens 2004: Pre-olympic Congress

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Hypertension has been introduced as most of fatalities/mortalities and the secretive and silence killer of people. The harmful side-effects of drugs used to control the disease have brought new serious problems for human health. This research is aimed at studying the effect of swimming on decreasing systolic and diastolic Blood Pressure BP and increasing plasma ANP concentration of those with mild Essential Hypertension EH.


20 male patients mild EH aged 40-55 on average and being sick for at least 2 years and dependent on Etanalol, 100 mg per day were selected and were assigned to 2 groups; experimental (EXP, N=11) and control (CON, N=9). The EXP group took part in an aerobic swimming program in 29 sessions; 3 sessions per week for 50-60 minutes. They swim with 60-65 % of HR max. The intensity of the exercise was determined by the HR train. The systolic and diastolic BP of the EXP group were measured before and after each session. The blood was sampled in 4 phase before beginning, 30 minute, 24 hours and 2 week after the last swimming session to determine the plasma ANP concentration using RIA methods. To analysis the finding t-test at p<0.05 was used.


The results showed that the systolic and diastolic (BP) in EXP group changed from 13.68 and 10.59 mmHg in the 1st session to 15.13 and 10.27 in the 7nd session, 14.18 and 9.68 in 15th session, 13.50 and 9.36 mmHg in 29th swimming sessions showing a significant decrease (P<0.003, P<0.003, P<0.000, P<0.000, P<0.003, P<0.003, respectively).The plasma ANP concentration mean in the EXP group changed from 8.885 pg before training to 9.927 in 30 min., and 9.905 in 24 h. and 11.332 pg in 2 weeks after swimming showing a significant increase (P<0.028, P<0.021, P<0.001, respectively). The systolic and diastolic (BP) and ANP concentration in the CON group did not show any significant difference before and after the increase at p<0.05.


Positive change in BP may be due to decreased resistance in vascular system and more blood distribution and oxygen uptake, also ANP increasement can cause a decreasement in cardiac output, secretion of aldestron and rennin hormones, creating pause in sampathic stimulation and on increasement in kidney filtration.


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