Seyed Mohammad Hossini, Ali Keshtiaray, Mostafa Hossein Shahid,
Volume 0, Issue 0 (11-2019)
Abstract
Abstract:
Introduction and purpose: Back pain is one of the most common musculoskeletal disorders. Since it is difficult for people with back pain to bear weight, a treatment that can strengthen the muscles of the lumbar region while bearing weight without pain is of great interest. Therefore, the purpose of this research was to compare the effect of eight weeks of traditional resistance training and TRX on the performance of people with non-specific chronic back pain.
Research method: 45 football players aged 20 to 30 years with chronic back pain were purposefully selected and placed in 3 groups, TRX exercises, traditional exercises and a control group of 15 people each. Before and after the training period, performance variable was evaluated by square test, and trunk endurance was evaluated by Magill tests. Further, the subjects of the experimental groups performed their respective exercises for 8 weeks and 3 sessions of 45 minutes each week, while the control group went through the research process without specialized back pain exercises. For the inferential analysis of the data, the statistical method of variance analysis of repeated measures was used.
Findings: In the intra-group comparison, a significant effect on performance was observed in both traditional and TRX training groups, but no significant difference was observed in the control group. The findings showed that, in the intergroup comparison between the intervention groups compared to the control and between the two intervention groups, a significant difference was observed in the performance and endurance variables of the trunk muscles, so that the TRX training group had a greater effect and effect size than the traditional training. .
Conclusion: In general, the results of this research showed that the TRX training program has a significant effect on improving performance compared to traditional resistance training.
A Gorzi, R Jazaei, A Rahmani, A Bahari,
Volume 17, Issue 18 (12-2019)
Abstract
Determining the best rest interval durations between resistance exercise sets for adaptation is very important. This study investigated the effect of different rest intervals duration between resistance exercise (RE) sets on the gene expression of CGRP and IGF-1. Forty two male Wistar rats were randomly divided in to 7 groups. The resistance exercise included one session of climbing on one meter ladder with 26 steps. Exercise included 4 sets of 5 repetitions with an overload of 150 percent of the rat's body weight and 30, 60, 90, 120, 150 and 180 seconds rest intervals. The qRT-PCR technique was used to evaluate the gene expression of CGRP and IGF-1. The gene expression of CGRP in soleus muscles following RE with rest intervals of 30 (P=0.001), 60 (P=0.001) and 90 seconds (P=0.001) were significantly lower than 120, 150 and 180 seconds. However, there were no significant differences in the gene expression of IGF-1 among all groups (P=0.12). Based on our results, it seems that these rest interval domains can be addressed as a cut point of gene expression for the strength and hypertrophy developing process at the cellular level.
