Zahra Karimi Ahmadabadi; Javad Nemati; Seyed Hesamuddin Mousavinia; Rasoul Rezaei
Abstract
Purpose: Depending on the intensity and duration of activity, aerobic exercise leads to changes in hemodynamic factors and the hemostatic system in hypertensive patients, which can be expected to change if blood flow is restricted during exercise. Therefore, the purpose of the present study was to investigate ...
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Purpose: Depending on the intensity and duration of activity, aerobic exercise leads to changes in hemodynamic factors and the hemostatic system in hypertensive patients, which can be expected to change if blood flow is restricted during exercise. Therefore, the purpose of the present study was to investigate the response of some hemodynamic and coagulation indicators to aerobic exercise with and without blood flow restriction in hypertensive patients.Methods: 10 hypertensive patients participated in two sessions of aerobic exercise (five bouts, two minutes of exercise at a speed of four km / h /one minute of inactive recovery) with and without blood flow restriction in a cross-over design. Blood pressure was measured before, immediately, five, 10, 15, 30 and 60 minutes after exercise. Platelet counts, Prothrombin Time and activated Partial Thromboplastin Time were taken before, immediately, 30 minutes and 24 hours after exercise. Heart rate and rate of perceived exertion were also measured at different times of exercise.Results: The effect of time was significant on all measured factors (P < 0.001) except platelet counts (P = 0.055), while the time-condition interaction was non-significant on other factors (P > 0.05) except heart rate (P = 0.011).Conclusion: Based on the results, blood flow restriction increased hemodynamic factors and decreased clotting time in hypertensive patients, but the differences between aerobic exercise with and without blood flow restriction were not significant, so it seems that exercise with limited blood flow does not pose an additional risk on the cardiovascular system and coagulation factors of middle-aged people with hypertension.
Bakhtyar Tartibian; Sirwan Mohammad Amini khayat
Abstract
Purpose: Desirable effects of exercise on cardiovascular health in pediatrics due to different physiology than other ages, has not been well elucidated. The aim of this study was to effect of 12 weeks of moderate-intensity aerobic exercise on cardiac structural and functional parameters in pediatrics. ...
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Purpose: Desirable effects of exercise on cardiovascular health in pediatrics due to different physiology than other ages, has not been well elucidated. The aim of this study was to effect of 12 weeks of moderate-intensity aerobic exercise on cardiac structural and functional parameters in pediatrics. Methods: Twenty healthy pediatrics (without regular training background) with average age of 10-12 years participated in this study. Subjects were randomized to one of two groups: control (n=10) and exercise (n=10). The subjects in the exercise group performed aerobic exercise training up to 55 -70% of heart rate reserve, three sessions per week, 25 to min per session for 12 weeks. The cardiac structural and functional parameters were measured with Echocardiography system at baseline and end of 12 week exercise training. The research data were analyzed using independent t- test and Paired t- test (p < 0.05). Results: In the exercise group in comparison to the control group and baseline conditions LVEDd, LVmass, LVEDV and VO2peak significantly increased (p < 0.05) and resting heart rate decreased (p < 0.05) after 12 weeks moderate intensity aerobic exercise. Conclusion: The results of present study demonstrates that after 12 weeks moderate intensity aerobic exercise some of cardiac structural and functional parameters in pediatrics will improve, As these changes can have an effective role in improvement of Pediatrics cardiovascular system.
