Showing 4 results for yaali
Hossein Ahadi, Mehdi Khaleghi Tazeji, Hassan Sadeghi, Rasuol Yaali,
Volume 0, Issue 0 (11-2019)
Abstract
Introduction: Balance is a key component of motor control and plays a crucial role in maintaining postural stability during dynamic tasks such as landing and changing direction. Time to stability is a sensitive indicator of neuromuscular efficiency in restoring balance after mechanical perturbations.
Purpose of study: The purpose of this study was to examine the effects of balance training with and without stroboscopic glasses on TTS in physically active individuals.
Methods: In this Randomized Controlled Trial study, 39 physically active men aged 18–30 years were randomly assigned to three groups: balance training with stroboscopic glasses, conventional balance training, and control. Participants completed six weeks of progressive balance exercises. TTS during single-leg landings from 30, 50, and 70 cm was measured using a force plate. Data were analyzed using ANCOVA and Bonferroni post hoc tests with a significance level of 0.05.
Results: The results of the analysis of covariance (ANCOVA) indicated that both training groups showed a significant improvement in time to stabilization compared with the control group (p < 0.05).A significant main effect of group was observed at 30 cm (η² = 0.34, F = 8.40, p = 0.001), 50 cm (η² = 0.25, F = 5.33, p = 0.010), and 70 cm (η² = 0.30, F = 6.96, p = 0.003).
The reduction in time to stabilization was greater in the stroboscopic eyewear group at the 50- and 70-cm landing heights and was accompanied by larger effect sizes. At the 30-cm height, both training groups demonstrated similar improvements.
Conclusion: Intentional visual perturbation using stroboscopic glasses enhances reliance on proprioceptive and vestibular inputs, improving dynamic balance control. Integrating stroboscopic glasses into balance training programs may be an effective strategy to enhance performance and reduce the risk of lower-limb injuries in athletes.
Keywords: Balance training, stroboscopic glasses, time to stability
Mr Behzad Mohamadi Orangi, Dr Rasoul Yaali, Dr Mohammad Taqi Aghdasi,
Volume 20, Issue 24 (3-2023)
Abstract
The aim of this study was to Compare Effectiveness motor proficiency of the nutritional status on men in different age groups ((children, adolescents and young adults)), respectively. Statistical Society study was for children all student ages 10-7 years, for adolescents all student ages 15-12 years and for Youth of all students 20-18 of Tehran University except the student physical education. The sample was 90 people in each of the age groups, the four elementary schools and four high schools in Tehran and Tehran University male students were chosen by cluster sampling. This study was a descriptive survey and comparison measurement was test of instruments anthropometric and Brvnynks- Oseretsky. The results showed that among malnutrition, moderate nutrition and proper nutrition in adolescence and adulthood motor proficiency was not statistically different ages but among children ages motor proficiency were significantly different. In addition, no significant difference between motor proficiency age groups. It seems due to the impact of nutritional status on motor proficiency, and this issue was observed in this study at an early age; therefore, children are the most vulnerable in this context and considering the nutritional status of children is very important.
Maryam Ghorbani, Rasoul Yaali,
Volume 22, Issue 28 (12-2024)
Abstract
The purpose of this research was the effect of Pilates exercises on balance and proprioception in female students. 98 female students voluntarily participated in this study. Of these, 91 healthy students were placed in the experimental group and 7 students with sports exemption were placed in the control group. The position senses of ankle and knee joints was measured using the active reconstruction test of the ankle and knee angles and static balance was measured using the Sharpened Romberg test before and after 16 intervention sessions. The results of Wilcoxon test showed that in the experimental group, static balance increased significantly in the post-test compared to the pre-test. The position sense of dorsiflexion, plantarflexion of ankle joint and knee flexion position sense in the experimental group increased significantly in the post-test. Also, the results of the covariance test showed that there is a significant difference between the two groups in the post-test in the variables of static balance and position sense of dorsiflexion and plantarflexion of ankle and position sense of knee flexion that according to the adjusted average, the experimental group performed better than the control group. The results showed that Pilates exercises are suitable for improving ankle and knee proprioception and improving postural control in teenagers and young adults.
Maryam Ghorbani, Rasoul Yaali,
Volume 23, Issue 30 (1-2026)
Abstract
Aim: Different postural stability and functional movements may play an important role in secondary injuries in people with flexible flat feet compared to people with normal feet. However, the difference between static and dynamic stability and functional movements of people with and without flexible flatfeet has not been investigated. Therefore, the current study was conducted with the aim of comparing static and dynamic stability and functional movements of subjects with and without flexible flatfeet and examined the relationship between functional movements and static and dynamic stability.
Methods: In the cross-sectional study, 96 subjects after evaluating the medial longitudinal arch of the foot with navicular drop test were divided into two groups, flexible flat feet group (n=25) and normal feet group (n=71). Functional performance using functional movements screening test, static stability using the Sharpened Romberg balance test, dynamic stability using the Y balance test were measured. In order to compare the parameters measured in two groups, non-parametric U-Mann-Whitney test was used.
Results: The scores of functional movements and static stability in the normal feet group were significantly higher than the flexible flatfeet group (p≤0.05). The total score of the Y test was not significantly different between the two groups (p≥0.05). In the group of normal feet, a significant correlation was observed between functional movement scores and dynamic stability (p≤0.05).
Conclusion: These results show that subjects with flexible flatfeet have different movement performance and static stability compared to subjects with normal feet, but they have similar dynamic stability. It may indicate that there is no connection between static and dynamic stability and these two functions are separate from each other.
