The acute effects of anaerobic exercise in the morning and evening on brain natriuretic peptide (BNP) in women with the Metabolic Syndrome

Background: Brain natriuretic peptide (BNP) in terms of pathological is an important indicator for evaluation and detection left ventricular systolic dysfunction. It seems that physical activity and circadian rhythms are effective on BNP concentration. The aim of this study was to investigate the acute effects of anaerobic exercise in the morning and evening on brain natriuretic peptide in women with Syndrome Metabolic. Methods: 17 women 30-40 years of age with Metabolic Syndrome were selected voluntarily and purposefully participated in the study. Then in two separate sessions (within 6 days) anaerobic exercise perfoemed in the morning and evening. Blood samples were collected before and immediately after exercise in the morning and evening. Results: The BNP concentrations significantly increased after exercise in the morning and evening (P˂0.000). There was significant difference between morning and evening in BNP concentration after exercise (P˂0.002). Conclusion: Considering the significant difference in the mean BNP concentration in the morning and evening, due to the lower average of BNP concentration in the evening it seems activity in the evening have less stress on the myocardial wall.