Mohammad Soltani1, Neda Aghaei Bahmanbeglou2, Sajad Ahmadizad1. 1. Department of Biological Sciences in Sport, Faculty of Sports Sciences and Health, Shahid Beheshti University, Tehran, Iran. 2. Faculty of Physical Education and Sport Sciences, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran.
Abstract
Aim: The present study examined and compared the effects of two different HIIT (High-intensity interval training) protocols on markers of blood fluidity in hypertensive patients. Methods:Thirty hypertensive (stage 1, systolic BP >140 and diastolic BP>90 mmHg) patients (age, 47.96 ± 3.20 yrs), were randomly allocated to short-duration HIIT (SDHIIT, n = 10), long-duration HIIT (LDHIIT, n = 10), and control (n = 10) groups. After 2 weeks of continuous mild training, patients in SDHIIT group performed 8 weeks of HIIT included 27 min HIIT that encompassed 27 repetitions of 30 s activity at 80%-100% of VO2peak interspersed by 30 s passive/active (10%-20% of VO2peak) recovery, while, patients in LDHIIT group performed 8 weeks of HIIT (32 min per session) included 4 repetitions of 4 min activity at 75%-90% of VO2peak interspersed by 4 min passive/active (15%-30% of VO2peak) recovery. Two blood samples were taken before and after training and were analyzed for hemorheological variables. Results: Significant (P < .05) reductions in systolic blood pressure (SBP), blood and plasma viscosity, fibrinogen concentration and red blood cell (RBC) aggregation (8-12%) were found following two training protocols (P < .05), though, the differences between adaptations were not statistically significant (P > .05). In addition, HIIT protocols increased RBC deformability significantly (P < .05), with no significant differences being observed between two protocols. Conclusion: It is concluded that HIIT training reduces SBP and markers of blood fluidity in patients with stage 1 hypertension irrespective of the HIIT intensity and duration. Therefore, this type of exercise training could be prescribed for improving the blood fluidity markers in hypertensive patients.
RCT Entities:
Aim: The present study examined and compared the effects of two different HIIT (High-intensity interval training) protocols on markers of blood fluidity in hypertensivepatients. Methods: Thirty hypertensive (stage 1, systolic BP >140 and diastolic BP>90 mmHg) patients (age, 47.96 ± 3.20 yrs), were randomly allocated to short-duration HIIT (SDHIIT, n = 10), long-duration HIIT (LDHIIT, n = 10), and control (n = 10) groups. After 2 weeks of continuous mild training, patients in SDHIIT group performed 8 weeks of HIIT included 27 min HIIT that encompassed 27 repetitions of 30 s activity at 80%-100% of VO2peak interspersed by 30 s passive/active (10%-20% of VO2peak) recovery, while, patients in LDHIIT group performed 8 weeks of HIIT (32 min per session) included 4 repetitions of 4 min activity at 75%-90% of VO2peak interspersed by 4 min passive/active (15%-30% of VO2peak) recovery. Two blood samples were taken before and after training and were analyzed for hemorheological variables. Results: Significant (P < .05) reductions in systolic blood pressure (SBP), blood and plasma viscosity, fibrinogen concentration and red blood cell (RBC) aggregation (8-12%) were found following two training protocols (P < .05), though, the differences between adaptations were not statistically significant (P > .05). In addition, HIIT protocols increased RBC deformability significantly (P < .05), with no significant differences being observed between two protocols. Conclusion: It is concluded that HIIT training reduces SBP and markers of blood fluidity in patients with stage 1 hypertension irrespective of the HIIT intensity and duration. Therefore, this type of exercise training could be prescribed for improving the blood fluidity markers in hypertensivepatients.
Authors: David C Hess; Mohammad Badruzzaman Khan; Pradip Kamat; Kumar Vaibhav; Krishnan M Dhandapani; Babak Baban; Jennifer L Waller; Md Nasrul Hoda; Rolf Ankerlund Blauenfeldt; Grethe Andersen Journal: Cond Med Date: 2021-06
Authors: Pedro Delgado-Floody; Mikel Izquierdo; Robinson Ramírez-Vélez; Felipe Caamaño-Navarrete; Roberto Moris; Daniel Jerez-Mayorga; David C Andrade; Cristian Álvarez Journal: Front Physiol Date: 2020-10-19 Impact factor: 4.566