عنوان مقاله [English]
Background and Aims: Progressive decline in physiological capacity and loss of ability to respond to environmental stresses due to aging; increased the vulnerability of older adult to disorders. One of the widespread and important problems in old age is decreased balance, increased falling and fear of falling. Balance is affected by strength, proprioception and speed of reaction and is the most important human ability to prevent falling. Maintaining muscle strength and functional mobility is one of the effective factors in achieving or maintaining success in balance and posture control. Suspended resistance training with TRX is a method consisting of resistance training that uses body weight and gravity and comprehensively covers a wide range of physical factors. However, few studies have been conducted on TRX exercises for the elderly, and in particular, functional exercises appropriate to aging and daily life and their needs have received less attention. The aim of this study was to investigate the effect of TRX suspended functional training on lower limb strength, functional balance and mobility, and fear of falling in older adult men.
Materials and Methods: This is a quasi-experimental study with pretest-posttest design using a control group. The study population consists of 30 elderly men with a mean (age= 67.9±4 yrs, height= 173.2±7 cm, weight= 76.7± 9 kg, BMI= 25.5 ± 2 Kg /m2 and fat percentage= 27.1±2) Based on the inclusion and exclusion criteria of the study, they were selected voluntarily. The sample size was estimated using G-power software with a statistical power of 95%, effect size of 0.5, and alpha of 0.05 (Figure 1). The subjects in the exercise group performed suspended training using the TRX strap and moderate intensity. Each training session lasted one hour. Lower limb strength, functional balance, functional mobility and fear of falling, respectively, by 30 second chair stand test (30CST), Berg Balance Scale (BBS), Timed Up and Go (TUG), and Falls Efficacy Scale international (FES-I), in two stages before and after the study were measure. Descriptive and inferential statistics were used to analyze the collected data in SPSS 19 software. To compare the differences between groups, ANOCOVA and bonferroni post hoc test was used. The significance level was set at 0.05.
Results: The results of the present study showed that lower limb strength, functional balance and mobility in the TRX training group were significantly different from the control group (p≤0.001). But the fear of falling in the TRX training group was not significantly different from the control group (p>0.05; Table 1).
Conclusion: One of the most important consequences of aging is a decrease in muscle strength, which can greatly affect the balance and mobility of the elderly. Because TRX exercises are resilient in nature, they can potentially improve strength by facilitating the use of large and fast-twitch muscle units, increasing muscle coordination and stimulating the musculoskeletal system, and increasing the number of muscle fibers. TRX suspension exercises also require gaining and maintaining balance to stabilize the body on an unstable surface. These exercises improve balance and functional mobility by affecting proprioception, muscle strength, joint stability, and motor coordination. In the present study, TRX exercises improved lower limb strength, balance, and functional mobility in the elderly, which could be through the above factors. However, in the present study, the fear of falling did not change, which due to the use of young elderly and relatively good physical fitness, they did not have any problems in this regard before the study. Therefore, it is recommended to use TRX exercises to improve the physical condition of the elderly.
Keywords: TRX, Balance, Mobility, Fear of falling, Elderly
Figure 1: Flowchart of the study
Table 1: Results of analysis of covariance for two test groups
Compliance with ethical guidelines
This study was approved by the ethics committee of Qazvin University of Medical Sciences (Code: IR.QUMS.REC.1400.257). Ethical principles are fully considered in this article. Also, all participants were aware of the research process and could leave the research process at any time. Their information was kept confidential.
Although the article is extracted from the MSc, but it did not receive any grant from funding agencies in the public, commercial, or non-profit sectors..
Conceptualization, methodology: Masoud Mirmoezzi; Draft writing, analysis, Masoud Moradi; Editing and finalization: Zohreh Eskandari
Conflict of interest
There was no conflict of interest in this study.