تعطیلات نوروز ۱۴۰۴-ضمن آرزوی قبولی طاعات و عبادات و همچنین تبریک فرارسیدن بهار و شروع سال جدید، به اطلاع میرساند این نشریه از تاریخ ۲۸ اسفندماه ۱۴۰۳ لغایت ۱۵ فروردین ۱۴۰۴ تعطیل می باشد.
1- Tehran University
Abstract: (343 Views)
Background & Objective: Despite the studies that have been conducted on the relationship between central stability and performance and according to the results of such research, researchers have not yet managed to clearly understand the impact or lack of impact of central stability on the performance of athletes. The purpose of this study was to compare the effect of central muscle fatigue on the kinematic parameters of walking between men and women.
Methods: The method of the present research was interventional (semi-experimental) due to the application of fatigue, and the selection of subjects was targeted based on entry and exit criteria. In the current research, the effect of central body muscle fatigue on walking was investigated through repeated measurement design (pre-test-post-test) in two groups of subjects including 15 male and 15 female university athletes. The statistical population of this research includes all young men and women aged 18 to 25 with 3 years of regular sports experience who participated in the exam based on a public call in the universities of Mashhad in the academic year of 1402-1401. Based on the entry and exit criteria, the samples of this research included 15 female and 15 male qualified volunteers who were identified from the statistical community and then purposefully selected as research subjects. The sample size was estimated to be 30 people using Gpower software with an effect size of 0.6 (error 0.05, power 0.95). The criteria for the inclusion of people in the present study was their body mass index between 20-25. The exit criteria also include such things as; Non-participation in the post-test and non-satisfaction of the person to participate in the research. In the non-entry criteria section, people who have A history of trunk or lower limb surgery, severe spinal deformities (scoliosis, kyphosis, etc.), meniscus damage and knee ligament tears, ankle joint instability, lower limb misalignment Visible including genovalgoma, genovarum, genovercorvatum, flat soles and hollow soles, suffering from back pain during the tests, having a history of any acute injury in the 60 days before the tests used, which had a negative effect in this research. and use assistive devices for walking, they could not participate in this research. Three attempts of walking without shoes were performed before and three attempts after the fatigue protocol. The subject was asked to walk a distance of two meters to the sides and in front of the location of the cameras. In order to analyze the data in SPSS software, the Shapiro-Wilk test was first used to check the normality of the data, then the correlation t-test was used to check the intra-group comparison, and the independent t-test with the significance level (alpha value) was used for the out-group comparison.
Results: There is no significant difference in the evaluation of the fatigue of the muscles of the central region on the kinematic parameters of walking evaluated in men and women, also by examining the comparison between the groups of women and men in the variables (step, step, step time, step time, rhythm and rhythm and speed) there is a significant difference in the pre-test stage. No significant difference was observed in other variables in both pre-test and post-test stages (P>0.05).
Conclusion: Examining the significant difference between men and women in step variables in the pre-test stage can indicate gender differences in kinematic parameters. These differences may be due to biological, physiological, educational and behavioral differences between women and men. But these results do not show that significant differences were not observed in other kinematic parameters. For example, there may be differences between women and men in step time, step time, rhythm and speed variables, but these differences were not visible due to the laboratory conditions or the type of test. The difference between foot and step can be seen as a result of the distribution of foot pressure in men and women.While there may be differences in the effects of fatigue on kinematic parameters between women and men, the general result shows that the effect of fatigue on walking performance may not be significantly different between the two sexes. Since the parameters of step, step, step time, step time, song and rhythm were constant in both pre-test and post-test stages; It should be noted that this result is correct only for the cases examined in the test and different results may be obtained in other conditions. Finally, it is suggested to use the statistical population in different conditions and ages for future researches.
Methods: The method of the present research was interventional (semi-experimental) due to the application of fatigue, and the selection of subjects was targeted based on entry and exit criteria. In the current research, the effect of central body muscle fatigue on walking was investigated through repeated measurement design (pre-test-post-test) in two groups of subjects including 15 male and 15 female university athletes. The statistical population of this research includes all young men and women aged 18 to 25 with 3 years of regular sports experience who participated in the exam based on a public call in the universities of Mashhad in the academic year of 1402-1401. Based on the entry and exit criteria, the samples of this research included 15 female and 15 male qualified volunteers who were identified from the statistical community and then purposefully selected as research subjects. The sample size was estimated to be 30 people using Gpower software with an effect size of 0.6 (error 0.05, power 0.95). The criteria for the inclusion of people in the present study was their body mass index between 20-25. The exit criteria also include such things as; Non-participation in the post-test and non-satisfaction of the person to participate in the research. In the non-entry criteria section, people who have A history of trunk or lower limb surgery, severe spinal deformities (scoliosis, kyphosis, etc.), meniscus damage and knee ligament tears, ankle joint instability, lower limb misalignment Visible including genovalgoma, genovarum, genovercorvatum, flat soles and hollow soles, suffering from back pain during the tests, having a history of any acute injury in the 60 days before the tests used, which had a negative effect in this research. and use assistive devices for walking, they could not participate in this research. Three attempts of walking without shoes were performed before and three attempts after the fatigue protocol. The subject was asked to walk a distance of two meters to the sides and in front of the location of the cameras. In order to analyze the data in SPSS software, the Shapiro-Wilk test was first used to check the normality of the data, then the correlation t-test was used to check the intra-group comparison, and the independent t-test with the significance level (alpha value) was used for the out-group comparison.
Results: There is no significant difference in the evaluation of the fatigue of the muscles of the central region on the kinematic parameters of walking evaluated in men and women, also by examining the comparison between the groups of women and men in the variables (step, step, step time, step time, rhythm and rhythm and speed) there is a significant difference in the pre-test stage. No significant difference was observed in other variables in both pre-test and post-test stages (P>0.05).
Conclusion: Examining the significant difference between men and women in step variables in the pre-test stage can indicate gender differences in kinematic parameters. These differences may be due to biological, physiological, educational and behavioral differences between women and men. But these results do not show that significant differences were not observed in other kinematic parameters. For example, there may be differences between women and men in step time, step time, rhythm and speed variables, but these differences were not visible due to the laboratory conditions or the type of test. The difference between foot and step can be seen as a result of the distribution of foot pressure in men and women.While there may be differences in the effects of fatigue on kinematic parameters between women and men, the general result shows that the effect of fatigue on walking performance may not be significantly different between the two sexes. Since the parameters of step, step, step time, step time, song and rhythm were constant in both pre-test and post-test stages; It should be noted that this result is correct only for the cases examined in the test and different results may be obtained in other conditions. Finally, it is suggested to use the statistical population in different conditions and ages for future researches.
Type of Study: Original Research Article |
Subject:
Rehabilitation
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