Javad Vakili; Saeed Nikookheslat; Farid Pakzad Hassanlou
Abstract
Purpose: Recently, the use of resistance training with restricted blood flow (BFR) has been recommended as an alternative to heavy resistance training for middle-aged and elderly people. Therefore, the aim of this research was to determine the effect of resistance training with and without BFR on levels ...
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Purpose: Recently, the use of resistance training with restricted blood flow (BFR) has been recommended as an alternative to heavy resistance training for middle-aged and elderly people. Therefore, the aim of this research was to determine the effect of resistance training with and without BFR on levels of anabolic and catabolic hormones in middle-age sedentary male.Methods: In this semi-experimental study design, 20 voluntary middle-aged sedentary men (age 47.65 ± 2.53 years) were selected. Subjects were randomly divided into two groups of resistance training with and without BFR. Subjects in the 4-week BFR group performed knee extension and leg press at 20% 1-RM intensity, one set of 30 repetitions and two sets of 15 repetitions, and the non-BFR training group performed the same movements at 80% 1-RM intensity in three sets with 10 repetitions. Blood samples were also taken to measure testosterone and cortisol, growth hormone and insulin-like growth factor-1. Finally, Data were analyzed by analyses of variance and independent T test. The significance level was set at P < 0.05.Results: Resting concentrations of growth hormone (P = 0.001), IGF-I (P = 0.001), and serum testosterone (P = 0.001) response increased significantly after four weeks of resistance training. Also, the only increase in resting growth hormone was significantly higher in the BFR group (P = 0.04). However, four weeks of resistance training with (P = 0.11) and without Restricted blood flow (P = 0.55) did not significantly change cortisol concentration.Conclusion: It seems likely that performing resistance training with BFR during middle age is a good way to achieve the health benefits of exercise training due to hormonal adaptations.
fateme halalkhor; Mansour Aghaei; Jawad Vakili
Abstract
purpose: Exercise training with blood flow restrictionare associated with immunological changes as well as changes in the indices of inflammation and muscle damage. Therefore, the aim of this study was conducted to identify the effect of 4 weeks rock climbing with and without blood flow restriction on ...
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purpose: Exercise training with blood flow restrictionare associated with immunological changes as well as changes in the indices of inflammation and muscle damage. Therefore, the aim of this study was conducted to identify the effect of 4 weeks rock climbing with and without blood flow restriction on response of the LDH, CK and CRP in elite rock climbers. Methods:12 elite male and 12 female rock climbers with at least 4 years rock climbing experience and age range of 23.54±2.32 to 27.18±3.18 years and a fat percentage of 8.22±1.12 to 14.19±1.18 percent were selected purposefully among elite climbers and randomly assigned to one of two groups The exercises were limited by blood flow and exercise without limitation of blood flow. The exercise protocol was performed for 4 weeks (three sessions per week and each session was 90 minutes, severity of each session was 60 to 80% of climbing grades). Blood samples were taken in two stages (pre and post test) in sitting and resting conditions to determine the amount of lactate dehydrogenase, creatine kinase, blood lactate and C-reactive protein. To analyze the data, an independent test was used to compare the meanings and Kolmogorov-Smirnov test for homogeneity of the two groups at a significant level of α ≤0.05. Results: The results showed that the index of muscle damage of LDH, CK and inflammatory CRP index did not show a significant difference in response to climbing exercises with and without blood flow restriction between the two groups (P <0.05). Conclusion: According to the results of this study, rock climbing training with or without blood flow restriction, do not increase inflammatory and muscular damage, and this method of training is likely to be safe for climbers due to the mechanical and metabolic pressure of exercise activity.
