THE EFFECT OF THE HEEL WEDGES ON THE ELECTROMYOGRAPHY ACTIVITIES OF THE SELECTED LOWER BACK MUSCLES DURING LOAD LIFTING

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ANBARIAN MEHRDAD; RAJABIAN FATEMEH; GHASEMI MOHAMAD HOSEIN; HEIDARI MOGHADDAM RASHID

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Journal: Iranian Journal of Ergonomics Year:2017 | Volume:5 | Issue:3 Page(s): 12-21

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Title

THE EFFECT OF THE HEEL WEDGES ON THE ELECTROMYOGRAPHY ACTIVITIES OF THE SELECTED LOWER BACK MUSCLES DURING LOAD LIFTING

Author(s)

ANBARIAN MEHRDAD | RAJABIAN FATEMEH | GHASEMI MOHAMAD HOSEIN | HEIDARI MOGHADDAM RASHID | Issue Writer Certificate

Keywords

HEEL WEDGEQ1

ELECTROMYOGRAPHY ACTIVITYQ1

LOAD LIFTINGQ1

ERECTOR SPINAE MUSCLESQ1

Abstract

Background: The aim of this study was to investigate the effect of the HEEL WEDGEs on the electromyography activities of the selected left and right lower back muscles during LOAD LIFTING.Methods: A total of 17 male subjects voluntarily participated in this quasiexperimental study. The selected subjects lifted a box, weighing 10% of their body weight, above the height of their hip joint, descending as far as the thigh, parallel to the ground, and then ascending to the starting position. The above task was performed nine times in two conditions, including with and without the HEEL WEDGEs. Using the ME6000 electromyography system, the activity level variables were normalized and the median frequencies of the erector spinae (ES) and the multifidus (MU) muscles were recorded. The subjects also held the box for 30 s in the standing position with stretched hands. The paired t-test was used for the data analysis.Results: The results showed that during static LOAD LIFTING using the HEEL WEDGE, the median frequency of the right ES muscle changed significantly (P<0.05). Also during dynamic LOAD LIFTING using the HEEL WEDGE, the activities of the left and the right ES muscles as well as the left MU muscle decreased significantly (P<0.05). However, no significant differences between the two conditions were observed for the other variables (P>0.05).Conclusion: During such occupational tasks, a decrease in the activities of the selected lower back muscles with the HEEL WEDGE might result in a delay in the onset of muscle fatigue. The above findings might be used in the design of shoes, suitable for the work environments. However, further investigations are needed in this area in order to provide more accurate results.

Cites

The Effect of Change in Foot Position on Electrical Activity of Human Muscles (Review Article)

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APA: Copy

ANBARIAN, MEHRDAD, RAJABIAN, FATEMEH, GHASEMI, MOHAMAD HOSEIN, & HEIDARI MOGHADDAM, RASHID. (2017). THE EFFECT OF THE HEEL WEDGES ON THE ELECTROMYOGRAPHY ACTIVITIES OF THE SELECTED LOWER BACK MUSCLES DURING LOAD LIFTING. JOURNAL OF ERGONOMICS, 5(3 ), 12-21. SID. https://sid.ir/paper/103176/en

Vancouver: Copy

ANBARIAN MEHRDAD, RAJABIAN FATEMEH, GHASEMI MOHAMAD HOSEIN, HEIDARI MOGHADDAM RASHID. THE EFFECT OF THE HEEL WEDGES ON THE ELECTROMYOGRAPHY ACTIVITIES OF THE SELECTED LOWER BACK MUSCLES DURING LOAD LIFTING. JOURNAL OF ERGONOMICS[Internet]. 2017;5(3 ):12-21. Available from: https://sid.ir/paper/103176/en

IEEE: Copy

MEHRDAD ANBARIAN, FATEMEH RAJABIAN, MOHAMAD HOSEIN GHASEMI, and RASHID HEIDARI MOGHADDAM, “THE EFFECT OF THE HEEL WEDGES ON THE ELECTROMYOGRAPHY ACTIVITIES OF THE SELECTED LOWER BACK MUSCLES DURING LOAD LIFTING,” JOURNAL OF ERGONOMICS, vol. 5, no. 3 , pp. 12–21, 2017, [Online]. Available: https://sid.ir/paper/103176/en

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