The effect of eccentric and concentric resistance training on quadriceps neuromuscular adaptations

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Azizi Ghouchan Fatemeh; Hedayatpour Nosratollah; CHERAGH BIRJANDI SADEGH; Izanloo Zahra

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Journal Paper

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Journal: Medical Journal of Mashhad University of Medical Sciences Year:2022 | Volume:65 | Issue:4 Page(s): 1701-1713

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Information Journal Paper

Title

The effect of eccentric and concentric resistance training on quadriceps neuromuscular adaptations

Author(s)

Azizi Ghouchan Fatemeh | Hedayatpour Nosratollah | CHERAGH BIRJANDI SADEGH | Izanloo Zahra | Issue Writer Certificate

Keywords

Eccentric Training

Concentric Training

Neuromuscular Adaptation

Electromyography

Abstract

Introduction: The aim of this study was to investigate the effect of two types of introverted and extroverted resistance training programs on Neuromuscular Adaptations (amplitude of electromyographic waves and mean frequency spectrum) of the quadriceps muscle. Methods: For this purpose, 24 subjects including non-athlete boys in the age range of 19 to 27 years in Bojnourd were randomly divided into two groups: eccentric (12 people) and concentric (12). The eccentric exercise group performed knee flexion with one leg at 150% 1RM to the limit of fatigue and the concentric exercise group performed knee extension with one leg at 75% 1RM to the limit of fatigue for 8 weeks. Surface electromyographic signals were measured and recorded before and after eight weeks of training for both groups. Multivariate analysis of variance (M-ANOVA) was used to examine changes in EMG variables before and after training sessions, muscle and training group as dependent variables. Results: Multivariate analysis of variance showed that the average frequency spectrum increase in the quadriceps muscle after 8 weeks of extroverted training is significantly higher than that of introverted. Also, these changes in the increase in electromyographic wave magnitude in the quadriceps muscle after 8 weeks of extroverted training are significantly more than introverted. Conclusion: In general, the eccentric exercise group showed a greater increase in electromyographic indices compared to the concentric exercise group, which is probably related to the application of central nervous system mechanisms to eccentric contractions.

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APA: Copy

Azizi Ghouchan, Fatemeh, Hedayatpour, Nosratollah, CHERAGH BIRJANDI, SADEGH, & Izanloo, Zahra. (2022). The effect of eccentric and concentric resistance training on quadriceps neuromuscular adaptations. MEDICAL JOURNAL OF MASHHAD UNIVERSITY OF MEDICAL SCIENCES, 65(4 ), 1701-1713. SID. https://sid.ir/paper/1121463/en

Vancouver: Copy

Azizi Ghouchan Fatemeh, Hedayatpour Nosratollah, CHERAGH BIRJANDI SADEGH, Izanloo Zahra. The effect of eccentric and concentric resistance training on quadriceps neuromuscular adaptations. MEDICAL JOURNAL OF MASHHAD UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2022;65(4 ):1701-1713. Available from: https://sid.ir/paper/1121463/en

IEEE: Copy

Fatemeh Azizi Ghouchan, Nosratollah Hedayatpour, SADEGH CHERAGH BIRJANDI, and Zahra Izanloo, “The effect of eccentric and concentric resistance training on quadriceps neuromuscular adaptations,” MEDICAL JOURNAL OF MASHHAD UNIVERSITY OF MEDICAL SCIENCES, vol. 65, no. 4 , pp. 1701–1713, 2022, [Online]. Available: https://sid.ir/paper/1121463/en

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