a.a. jafarnezhadgero

Low back pain is a common problem in world and one of the most common causes of physical disability. The aim of this review study was to investigate the effects of rehabilitation exercises with a central muscle stabilization approach on kinetic, kinematic and electromyographic variables during walking, running, trunk flexion and extension movements in patients with back pain.

Search process for Persian and English articles from the beginning of January 2000 to August 2023 were performed in Google Scholar, ISC, Scopus, Pub Med, WOS, and SID databases. Finally, based on selection criteria, 19 articles were selected for final analysis through detailed reviews. The participants had non-specific back pain. Studies that included exercise protocols and control group were used in the present study. The dependent variables were kinematics and kinetics and muscle activity during transitional movements. Downs and Black questionnaires were used to evaluate the quality of the articles.

The results of four articles showed that rehabilitation exercises with muscle endurance approach can improve the electrical activity of muscles and reduce back pain. The results of seven articles showed that strengthening, stretching and massage exercises can be effective in improving pain through correcting the person's vertical alignment. Other articles in a period of at least eight weeks showed that strengthening the central muscles of the body can lead to neuromuscular adaptation and increase muscle fibers recruitment in patients with back pain.

The present review have shown  that rehabilitation exercises with the approach of strengthening the central muscles of the body can lead to improving the flexibility of the trunk muscles, correcting the person's vertical alignment and reducing the back pain.

Abnormal hip kinematic and impaired hip muscle performance have been associated with various musculoskeletal disorders, such as patellofemoral pain, ligaments injuries, low back pain, and hip joint pathology. Therefore, the aim of this study was to determine the effect of movement-pattern training on selected landing kinematic variables in athletes with non-specific chronic low back pain.

This clinical trial was carried out at the University of Mohaghegh Ardabili at 2018. Firstly, 30 males with non-specific chronic low back pain were selected by available sampling and randomly divided into the control (15 subjects) and experimental (15 subjects) groups. Tests were done in the form of pre and post-tests. Movement pattern exercises were performed on the experimental group over a 6-week period. Ethically, the training protocol was done on the control group after the post-test. ANCOVA test was used for statistical analysis of data.

The results showed that movement pattern exercises improved (increase) the kinematic variables in patients with chronic non-specific low back pain (p=0.001).

Findings demonstrated that implementation of movement pattern exercises significantly altered kinematic variables that could be beneficial for future researches in order to prevent and treat individuals with low back pain.

Knee joint, like other joints in the body, is affected by defects, injuries and diseases. Genu valgum is one of the most common lower limb complications. The purpose of the present study was to determine the effects of corrective exercises using Thera-Band on components of ground reaction force in boy students with genu valgum during running.

The present study was a clinical trial. 24 male students (20-30 years old) were randomly divided into control and experimental groups. The present study was conducted at University of Mohaghegh Ardabili Health and Wellness Center in 2019. Corrective exercises were performed for 8 weeks using Thera-band for the experimental group. The control group did not receive any treatment intervention during this period. The ground reaction forces were recorded by a force plate. Data were analyzed using repeated measures ANOVA.

The results of this study showed a significant difference in the time to peak in the vertical direction during the push off phase of the experimental group (5.17%) (p=0.030, d=0.589). In the experimental group, the other components of ground reaction forces did not demonstrate any significant effect during post-test than that in the pre-test (p>0.05).

The selected corrective exercises using the Thera-band were able to increase the time to peak of the vertical force during the push off phase during the post-test compared to the pre-test. This increase was probably due to the longer contact of foot with the surface, which reduces the amount of force applied to the foot.

Because of an altered walking mechanism in blind individuals compared to healthy ones, it is expected that using textured insoles in blind individuals change the mechanism and ground reaction forces encounter to the lower limbs and joints. Therefore, the aim of this study was to compare frequency domain of ground reaction forces during walking with and without textured insoles in blind individuals.

12 blind males (age: 29.66±4.39 years) volunteered to participate in this study. A foot scan system was used for measuring frequency spectrum of ground reaction forces during walking with and without textured insoles. Paired sample t-test was used for statistical analysis.

The findings indicated similar walking speed during walking with and without textured insoles in blind individuals (P>0.05). The frequency content with power 99.5% in the vertical ground reaction force component during walking with insoles were greater than that walking without it (p=0.039). Also, the frequency content with power 99.5% in the 3rd toe and 4th toe during orthoses condition were greater than that without it (p<0.05). In addition, frequency bandwidth in the 3rd toe region of the foot in insole condition was lower than that without insole condition (p=0.039).

Although there was similar walking speed during walking with and without textured insoles in blind individuals, there were lower frequency bandwidth and median frequency of ground reaction forces during orthoses condition compared to without.