Journal of Rehabilitation Sciences & Research

Background: It has been recommended to use push-up for strengthening the scapular stabilizers and to use unstable surfaces for increasing the neuromuscular system involvement. However, ... Read More

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Electromyographic Onset and Activity Level of Medial and Lateral Hamstrings, Vastus Medialis Obliquus, and Vastus Lateralis in Women with atellofemoral Pain During Stair Descent

Amin Kordi Yoosefinejad; Mahsa Mazaheri; Sobhan Sobhani; Alireza Motealleh

Volume 9, Issue 3 , September 2022, , Pages 128-133

Abstract

Background: Delayed activation of medial hamstrings (MH) relative to lateral hamstrings (LH) could lead to external tibial rotation. It is a long-held belief that altered force sharing ... Read More

Effects of 12 Weeks Concentric and Eccentric Resistance Training on Neuromuscular Adaptation of Quadriceps Muscle

Talieh Bagheri; Bahram Abedi; Nosratollah Hedayatpour

Volume 7, Issue 4 , December 2020, , Pages 161-166

Abstract

Manipulating resistance training program variables is a commonly used tool for optimizing maximum muscle strength in rehabilitation and/or exercise training programs. The current ... Read More Manipulating resistance training program variables is a commonly used tool for optimizing maximum muscle strength in rehabilitation and/or exercise training programs. The current study purposed to compare the effects of 12 weeks of concentric and eccentric resistance training on neuromuscular adaptation of quadriceps muscle. Methods Twenty-six male subjects (age, mean ± SD, 22.1 ± 2.4 yr; body mass, 72.3 ± 9.9 kg; height, 1.75 ± 0.08 m) were recruited for this controlled laboratory study. Subjects were randomly divided into two groups: the eccentric training group (No = 13) and the concentric training group (No = 13). The maximal isometric voluntary contraction (MVIC) of quadriceps muscles, vertical jumping, and surface electromyography (EMG) signals were recorded before and after 12 weeks of resistance concentric and eccentric training. Repeated-measures Analysis of Variance (ANOVA) was used to test differences between means before and after resistance training. Results The maximal isometric voluntary contraction of the quadriceps muscle and vertical jumping were significantly increased after eccentric and concentric training (p <0.05). Eccentric exercise resulted in a greater increase in maximal isometric voluntary contraction of the quadriceps muscle and vertical jumping compared to concentric training (p <0.05). The amplitude of surface EMG signals was also significantly increased after eccentric and concentric training (p <0.05), with a greater increase observed in the eccentric than the concentric training group (p <0.05). Conclusion The results of this study showed higher increases in muscle force output and EMG activity after eccentric training. This may indicate that stretch combined with overloading is the most effective stimulus for enhancing neuromuscular activity during dynamic resistance exercise. The knowledge gained from this study may be relevant for designing exercise and/or rehabilitation training to improve muscle output.

Comparison of maximum voluntary contraction positions for serratus anterior muscle in men with scapular dyskinesis: Electromyography analysis

Mohammad Bayattork; Foad Seidi; Hooman Minoonejad; Arezoo Shahriarpour

Volume 6, Issue 2 , June 2019, , Pages 91-94

Abstract

Background:The purpose of this study was to quantify the surface EMG activity of the serratus anterior muscle during two main test positions performed with the maximum effort by the ... Read More

Association Between Preparatory Knee Muscle Activation and Knee Valgus Angle During Single Leg Cross Drop Landing Following Anterior Cruciate Ligament Reconstruction

Shadan Mohammadpour; Reza Rajabi; Hooman Minoonejad; Ali Sharifnezhad

Volume 6, Issue 1 , March 2019, , Pages 15-20

Abstract

Background: Knee valgus angle seems to be a key factor in both primary– and second–ACL injury risk models. The control of the alignment of the lower limb during dynamic ... Read More

Prediction of Scapular Dyskinesis Through Electromyographic Indices of Scapulothoracic Muscles in Female Overhead Athletes

Leila Ghanbari; Mohammadhossein Alizadeh; Hooman Minoonejad; Seyed Hossein Hosseini

Volume 5, Issue 3 , September 2018, , Pages 74-80

Abstract

Background: Shoulder joint function and the athletic performance of overheadathletes are influenced by scapular dyskinesis (SD) due to its high prevalenceamong these athletes and the ... Read More

Comparative Evaluation of Core and Knee Extensor Mechanism Muscle Activation Patterns in a Stair Stepping Task in Healthy Controls and Patellofemoral Pain Patients.

Alireza Motealleh; Nader Maroufi; Javad Sarrafzadeh; Mohammad Ali Sanjari; Nasrin Salehi

Volume 1, Issue 4 , December 2014, , Pages 84-91

Abstract

Background:Patellofemoral pain (PFP) is a common affliction and complex clinical entity. Deficit in neuromotor control of the core may be a remote contributing factor to the development ... Read More

Volume 9 (2022)

Volume 8 (2021)

Volume 7 (2020)

Volume 6 (2019)

Volume 5 (2018)

Volume 4 (2017)

Volume 3 (2016)

Volume 2 (2015)

Volume 1 (2014)

Keywords = Electromyography

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