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Farnaz Aminian, Mahmood Hejazi, Sadegh Cheragh Birjandi,
Volume 14, Issue 5 (Sep-Oct 2020)
Abstract

Background and objectives: Evidence suggests that decrease in the serum concentration of myostatin (MSTN) may reduce age-related decrement in muscle mass, especially in older individuals. This study aimed at investigating the effects of 12 weeks of resistance training with and without blood flow restriction on MSTN and muscular strength (MS) of elderly women.
Methods: Thirty elderly women were randomly assigned into three groups of resistance training with blood flow restriction (n=10), resistance training without blood flow restriction (n=10) and control (n=10). The resistance training intervention was carried out three sessions a week for 12 weeks. Body composition, MS and serum concentrations MSTN were assessed at baseline and 48-36 hours after the last training session.
Results: There was a significant time × group difference in MS following 12 weeks of exercise intervention (P=0.001). However, there was no significant group and time × group difference in MSTN concentrations (P=0.2).
Conclusion: Low intensity BFRT does not decrease MSTN concentrations in elderly women. However, low intensity BFRT can increase MS values in these individuals.
Farnaz Aminian, Seyyed Mahmood Hejazi, Sadegh Cheragh Birjandi,
Volume 15, Issue 3 (May-Jun 2021)
Abstract

Background and objectives: Blood flow restriction training (BFRT) has gained substantial interest due to the lower required intensity, which may be beneficial for individuals who are not able to lift heavy weights. Therefore, we aimed at evaluating effects of 12 weeks of resistance training with and without blood flow restriction on follistatin (FST) concentrations and physical performance in elderly females.
Methods: Thirty elderly female were randomly assigned into the following groups: resistance training with blood flow restriction (BFRT; n=10), resistance training without blood flow restriction (WBFRT; n=10) and control ( n=10). The resistance training was carried out three session a week for 12 weeks. Serum concentrations of FST, muscular endurance and dynamic balance were assessed at baseline and after the 12week intervention.
Results: Significant main effects of time were observed for FST (p =0.03, η2 = 0.15), muscular endurance (p = 0.00, η2 = 0.59) and dynamic balance (p=0.00, η2 = 0.57). FST [BFRT= 1.4 ng/ml (effect size Cohen’s {d} = -0.8) significantly increased only in BFRT group. However, muscular endurance [BFRT= 95 (d= -4.1) and WBFRT = 32 (d= -0.9)] significantly increased in both intervention groups (P<0.05). In addition, dynamic balance [BFRT= -0.5 seconds (d= 2.2)] significantly increased only in the BFRT group (P<0.05).
Conclusion: BFRT was able to increase FST concentrations. Due to its mechanistic role in muscle mass alterations, elderly females can incorporate our BFRT protocol to improve anabolic conditions for muscular adaptations. 

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