Ruba Alfassih; Sajad Ahmadizad; Rana Fayazmilani; Minoo Ahmadinejad
Abstract
Background and Aim: Thrombotic events are common during old age and high intensity interval exercise (HIIE) is prescribed on the health of elderly individuals. Nevertheless, effects of high intensity interval exercise (HIIE) on hemostasis in elderly individuals have not been investigated. Therefore, ...
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Background and Aim: Thrombotic events are common during old age and high intensity interval exercise (HIIE) is prescribed on the health of elderly individuals. Nevertheless, effects of high intensity interval exercise (HIIE) on hemostasis in elderly individuals have not been investigated. Therefore, the present study aimed to investigate the response of hemostatic factors to different HIIE protocols and moderate continuous exercise in elderly male wistar rats. Materials and Methods: Twenty-four elderly male wistar rats were divided into four groups. Rats in the high-intensity interval exercise with low-volume (HIIEL) group performed 14 bouts of 20s of activity with 10-second rests at an intensity of 110% of maximum tolerable load (MSL). Rats in the high intensity high-volume interval group (HIIEH) performed five bouts of four min swimming at 80% of MSL followed by three min rest and finally in the continuous group (CTN) the rats swam for 35 min at 60% of MSL. The control group remained immersed in water for 35 minutes without activities. Blood samples were taken immediately after exercise for measuring lactate and hemostatic factors. The statistical analysis of the data was performed using one-way analysis of variance at a significance level of p<0.05. Results: Lactate concentration was increased following HIIEL in comparison to other groups. In addition, in the HIIEL and HIIEH groups, sports activity led to a significant increase in the Von Willebrand factor. Although, the VIII factor and fibrinogen increased and decreased in both CTN and HIIEL groups, respectively and decreased and increased in HIIEH group, the changes were not significant. Also, significant changes in dimer levels, relative activated thromboplastin time and prothrombin time after swimming were not seen in any group. Conclusions: Based on higher increases in von Willebrand factor following intense interval exercise (compared to continuous exercise) it is concluded that moderate continuous exercise might be safer than HIIE during old age.
Hamidreza Barzegarpoor; Hamid Rajabi; Duen Button; Rana Fayazmilani
Abstract
Background and Aim: It seems that the combination of brain endurance training and physical endurance training can increases endurance exercise performance throughout reducing rating of perceived exertion more than solely physical endurance training. The aim of this research was to study the effect of ...
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Background and Aim: It seems that the combination of brain endurance training and physical endurance training can increases endurance exercise performance throughout reducing rating of perceived exertion more than solely physical endurance training. The aim of this research was to study the effect of physical endurance training, and brain endurance training on fatigue and exercise tolerance in active people. Materials and Methods: 20 healthy volunteers (14 men and 6 women) were assigned into two groups as: physical endurance training + brain endurance training and physical endurance training. Both groups trained on a cycle ergometer for 60 minutes at 60-75 heart rate reserve. Whilst cycling, the brain endurance training group performed a mental exertion on a computer. Both groups trained 3-4 times a week for 24 sessions. Maximal oxygen consumption during an incremental test and exercise tolerance with constant load exhausting test were measured at pre and post training. Rating of perceived exertion and heart rate were recorded every two minutes during time to exhaustion test. Data were analyzed using mixed model analyze of variance and significant level was set as p˂0.05. Results: Maximal oxygen consumption increased in both groups (p=0.01); however, for time to exhaustion variable it showed more increasing in the brain endurance training and physical endurance training group than in the physical endurance training group (p=0.01). Brain endurance training and physical endurance training group compared to the physical endurance training group indicated significantly reduction on the rating of perceived exertion during time to exhaustion test (p=0.01). Conclusion: The results of this study provide evidence that the combination of the brain endurance training and physical endurance training than physical endurance training can increased more endurance exercise performance throughout decrease rating of perceived exertion.