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Showing 5 results for Letafatkar

Dr Amir Letafatkar, , ,
Volume 0, Issue 0 (11-2019)


Introduction: Previous studies have shown promising results in improving pain, disability, and kinesiophobia in chronic low back pain patients through pain neuroscience education and targeted cognitive motor control exercises. The aim of this study was to compare the effectiveness of a combination of pain neuroscience education and targeted cognitive motor control exercises with targeted cognitive motor control exercises alone in patients with chronic low back pain.
Materials and Methods: Fifty-four chronic low back pain patients (the pain neuroscience education with targeted cognitive motor control exercises group, n=27 and the targeted cognitive motor control exercises only group, n=27) participated in this study. Pain (visual analogue scale), disability (Oswestry Disability Index), central sensitization inventory, and kinesiophobia (Tampa Scale) were assessed at baseline and eight weeks after interventions. Repeated measures analysis of variance and linear mixed models with Bonferroni correction were used to examine between-group differences.
Results: A significant group × time interaction effect was found for pain (p=0.008), central sensitization inventory (p=0.002) and kinesiophobia (p<0.001) in the pain neuroscience education with targeted cognitive motor control exercises group compared to the targeted cognitive motor control exercises only group after eight weeks. Main effects of time were observed for pain, disability, and fear of movement after interventions (p<0.001). No significant group × time interaction effects was found for disability (p=0.50).
Conclusions: This study’s findings support the provision of pain neuroscience education as a clinically effective addition to targeted cognitive motor control exercises in chronic low back pain patients.
Behnam Moradi, Amir Letafatkar, Malihe Hadadnezhad, Mehdi Hosseinzadeh, Mehdi Khalegi,
Volume 0, Issue 0 (11-2019)

Introduction and aim: Fatigue of injury-prone athletes and their placement in situations such as performing shear maneuvers increases the risk of anterior cruciate ligament injury. Therefore, this research aims to answer the question, does functional fatigue change the effect of neuromuscular training on kinetic variables during cutting in injury-prone male athletes?
Methodology: The current research is semi-experimental and was carried out in two control and experimental groups as a pre-test and post-test design with and without fatigue before and after neuromuscular exercises. 32 males student-athletes aged 18 to 25 with trunk control defects were purposefully selected and randomly placed in the control group (16 people) and the experimental group (16 people). The force plane was used to measure ground reaction forces. Analysis of variance test was used for statistical analysis at a level smaller than P<0.05.
Results: The results of the present study showed a significant improvement in ground reaction force variables in the post-test of the experimental group compared to the pre-test (P<0.05). While none of these variables had significant changes in the control group (P>0.05).
Conclusion: It seems that doing trunk and hip neuromuscular training in athletes with a trunk control defect leads to a significant improvement in the stability of the trunk control, so in the conditions with and without fatigue, they were able to show a significant improvement in the selected parameters of the ground reaction forces. Therefore, this training method can probably be recommended as a beneficial method for athletes and the mentioned conditions
Mohadse Salehi Sarbizhan, Amir Letafatkar, Mehdi Khaleghi,
Volume 16, Issue 16 (12-2018)

The most common side effect of physical activity is the risk of musculoskeletal damage, that anterior cruciate ligament injury is the most common one. Purpose of the study is comparing the effect of six weeks of comprehensive injury prevention training on anterior cruciate ligament with internal and external feedback on the proprioception and knee function of active female university students. Forty five active female university students aged 18-25 years were volunteered and randomly assigned to three groups (internal, external and control) and they performed the protocol three times a week for six weeks. Proprioception and function of the knee joint were measured using goniometer and functional tests in two stages  namely pre-test and post-test. Statistical analysis of covariance, paired t test and Tukey's post hoc tests were used for statistical analysis with a significant level of p≤0.05. Overall results of the study showed that the present exercise protocol with internal and external feedback had a significant effect on the proprioception of p≤0.001 and p=0.000 for the knee performance and there was no significant difference between the two training groups. Regarding the results of the study, it is suggested that the present training protocol be addressed by coaches and sport sciences specialists as a complementary tool and method, along with other training methods, for those who are prone to damage to the anterior cruciate ligament.

P Zalbeik, A Letafatkar, Sh Rezvan Nobahar,
Volume 18, Issue 19 (7-2020)

Feedback instruction is a proven modality for the alteration of motion patterns. There are no existing data on the contribution of strength training, when combined with feedback instruction, to the altering of lower extremity biomechanics. Thus the purpose of the current study was comparison of strength training  program with external and internal focus of attention strategies on kinetic and functional factors in athletes with plyometric pattern. 36 athlete females (handball, Basketball and vollyball) voluntarily with avarage age 22.3±2.27 years were randomly assigned to strength training with external focus, strength training with internal focus and strength training groups. Participants completed these training for 8 weeks. Kinetic factors were measured using force plate during landing, as well as functional movement and movement pattern respectively were measured by single leg triple hop test (SLTH) and landing error scoring system. One-way analysis of variance (ANOVA) showed that the effect of strength training with external focus group training significantly was better than two others groups in Peak vertical ground reaction  (p=0.039), posterior ground reaction force (p=0.046), mediolateral time to stability (p=0.032), single leg triple hop test (p=0.041) and landing error scoring system  scores (p=0.030). But there was no significant between-group difference in anteroposterior time to stability (p=0.312). Subjects in strength training with external focus group showed significantly within-group changes in all variables except anteroposterior time to stability from posttest to pretest. Programs that include both strength training and movement education through external focus of attention may be necessary in order to prevent ACL injuries and increase athletic performance.


Masoud Barzegar, Malihe Hadadnezhad, Sadredin Shojaedin, Amir Letafatkar, Rose Fouladi,
Volume 21, Issue 26 (12-2023)

The aim of this research was effect of eight weeks of neuromuscular training (NMT) with and without cognitive-dual tasks (DTs) on proprioception and balance of athletes with ACL deficiency (ACL-D). 39 soccer players with ACL-D were selected purposefully and randomly divided into three groups of 13 (control group, neuromuscular training group and neuromuscular training with dual tasks group). Two training groups performed the exercises for eight weeks and three sessions per week. cognitive-motor dual tasks were performed in one of the groups along with neuromuscular exercises in the form of counting down numbers, memorizing numbers, calculating unexpected equations, specialized football skill movements.  The results of the current study indicated that there was no significant difference in knee joint proprioception in the open and closed kinetic chain after applying the intervention between the three groups, but there was a significant difference in lower extremity performance of the athletes based on the Y balance test in the anterior and posterior-lateral direction between the three groups (p<0.05). It seems that providing neuromuscular exercises along with cognitive-dual tasks can probably be considered as a useful approach to improve lower extremity performance based on the Y balance test in athletes with anterior cruciate ligament deficiency.


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