The Effect of Eight Weeks of Resistance Training and a Period of Detraining on Muscle Fiber Shortening (FS%) and Relative Wall Thickness (RWT) of the Left Ventricle in Low-Mobility Women

Naghizade Ghezel Ahmad, Hasan; Fallah Yakhdani, Hamidreza; Hoseinzade, Solaleh; Babaei Mazreno, Alireza

doi:10.22054/nass.2024.81669.1160

Document Type : Research Paper

Authors

¹ Assistant Professor of exercise physiology, department of sport sciences,ardakan university, p.o.box 184, ardakan , iran

² Assistant Professor, Faculty of Psychology and Educational Sciences - Department of Physical Education and Sports Sciences, Yazd, Iran

³ Masters in Sports Physiology, Yazd Azad University, Iran

⁴ Department of Sports Physiology, Faculty of Sports Sciences, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

https://doi.org/10.22054/nass.2024.81669.1160

Abstract

Purpose: The purpose of the present research was to investigate the effect of eight weeks of progressive resistance exercise and a subsequent detraining period on the indicators of muscle fiber shortening (FS%) and the relative wall thickness (RWT) of the left ventricle in low-mobility women. Method: This semi-experimental study was conducted in a field-laboratory setting. A total of 32 sedentary women, who met the criteria for participation and were able to engage in the exercise protocol, were randomly assigned to two groups: 1) Resistance training group (16 participants), and 2) Control group (16 participants). Anthropometric characteristics, body composition, and structural indices such as left ventricular muscle fiber shortening percentage (FS%) and relative wall thickness (RWT) were measured using an echocardiography device at three intervals: before the start of training, at the end of 8 weeks of training, and after a 4-week detraining period. The training protocol was implemented over 12 weeks, consisting of 8 weeks of training with three sessions per week, followed by 4 weeks of detraining. Data were analyzed using independent t-tests and repeated measures analysis of variance (ANOVA) at a significance level of p < 0.05, using SPSS version 21. Results: The results showed a significant difference in FS% between pre-test and post-test measurements for both the experimental and control groups (p < 0.05). Additionally, a significant decrease in FS% was observed in the training group during the detraining period (p < 0.05). Similarly, a significant change in RWT was found between pre-test and post-test measurements in both groups (p < 0.05), and significant changes in RWT were also observed during the detraining period in the training group (p < 0.05). Conclusion: Based on these findings, it can be concluded that 8 weeks of resistance training led to beneficial changes in the structure and function of the heart in sedentary women. However, the 4-week detraining period resulted in negative effects on these adaptations. Therefore, it is recommended that individuals engage in regular and structured resistance training to maintain these positive adaptations.

Keywords

Main Subjects

Exercise Physiology

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New Approaches in Exercise Physiology

The Effect of Eight Weeks of Resistance Training and a Period of Detraining on Muscle Fiber Shortening (FS%) and Relative Wall Thickness (RWT) of the Left Ventricle in Low-Mobility Women

References

References

Volume 5, Issue 10
December 2023
Pages 155-182

The Effect of Eight Weeks of Resistance Training and a Period of Detraining on Muscle Fiber Shortening (FS%) and Relative Wall Thickness (RWT) of the Left Ventricle in Low-Mobility Women

References

References

Volume 5, Issue 10December 2023Pages 155-182

Volume 5, Issue 10
December 2023
Pages 155-182