amir shams - Academia.edu (original) (raw)

Papers by amir shams

DOAJ (DOAJ: Directory of Open Access Journals), Jul 1, 2010

Zenodo (CERN European Organization for Nuclear Research), Apr 30, 2023

Sport Sciences for Health, Jun 25, 2022

Zenodo (CERN European Organization for Nuclear Research), Mar 21, 2021

Journal of Science and Medicine in Sport, 2022

OBJECTIVES To measure motor competence among a representative sample of Iranians aged 5-85 years.... more OBJECTIVES To measure motor competence among a representative sample of Iranians aged 5-85 years. DESIGN Cross-sectional. METHODS Motor competence was assessed quantitatively by the Test of Motor Competence; two fine motor skills (placing and building bricks) and two gross motor skills (heel-to-toe-walking and walking/running in slopes) to assess dynamic balance. Task scores were summed and transformed into standardized scores (z-scores). Data were stratified by 12 chronological age groups and sex. RESULTS Participants were 500 Iranians aged 5-85 years (females = 64%, age 5-35 years = 82%). There were significant age differences in motor competence and the distribution between age and z-score distribution was u-shaped. Between childhood and adolescence there was a rapid improvement in motor competence with maximal speed (-2 standard deviations) occurring among 19-25-year-olds. For each decade after age 25 years, z-scores progressively decreased approximately 1 standard deviations until age ≥56 years when performance decreased to approximately the same speeds as children (> +3 standard deviations). Sex differences were observed between children and adolescents. CONCLUSIONS The sample characteristics constrain the generalizability of our findings. The Test of Motor Competence is easy to administer, uses a standardized test battery for people aged 5-85 years, and the quantitative outcome enables longitudinal monitoring of motor competence across the life course. As life expectancy and the proportion of populations aged >65 years increases, understanding how to maintain health in older age is an important public health issue in 21st century.

Background & Purpose: The mechanisms involved in the performance expertise of research have attra... more Background & Purpose: The mechanisms involved in the performance expertise of research have attracted many researchers. One of these mechanisms is visual skills. Many researchers have tried to compare different skills among expert and novice athletes to provide different solutions to enhance their performance. The aim of this study was to investigate the effect of football fatigue on decision-making and visual search behavior of novice and expert players.Methodology: The participants included 14 novice male soccer players with the mean age of 22.5 years old along with 14 expert male soccer players with the mean age of 27.4 years old. Both groups watched some films about five vs. five attack situation. Then, they stated their decision, which included four options of passing the ball by the ball owner player in states without fatigue and fatigue. Results: For data analysis, ANOVA and Bonferron's post hoc test were used. The results showed that there was no significant difference b...

OLYMPIC, 2010

The main purpose of this study was to examine the effect of visual, proprioception and practice s... more The main purpose of this study was to examine the effect of visual, proprioception and practice sessions on acquisition and transfer of underhand service in volleyball and to exploring the specificity of learning hypothesis. To accomplish this objective, 60 college female students of right ...

Perceptual and Motor Skills, Feb 7, 2023

Journal of Motor Learning and Development

Purpose: To examine the factor structure and measurement invariance of the Körperkoordinations Te... more Purpose: To examine the factor structure and measurement invariance of the Körperkoordinations Test Für Kinder (KTK) and covariates of motor competence in a sample of Iranian children aged 5–14 years. Methods: Participants were children aged 5–14 years (N = 432, 61% boys). Age, sex, and body mass index were collected. Confirmatory factor analysis (CFA) was conducted to investigate the factorial structure of KTK and multigroup CFA carried out to test measurement invariance across sexes and age groups. In addition, we calculated a model with covariates to identify the association between KTK items with age, sex, and body mass index z score. Results: CFA supported the construct validity of a one-factor model with an appropriate fit indices that the four subtests loaded on the same factor namely motor competence. Furthermore, according to the magnitude of changes in root mean square error of approximation and comparative fit index between nested models, the assumption of KTK measurement...

Journal of Shahrekord University of Medical Sciences, 2017

Iranian Journal of Psychiatry and Clinical Psychology, 2021

Objectives: Attention Deficit/Hyperactivity Disorder (ADHD) is one of the most common mental diso... more Objectives: Attention Deficit/Hyperactivity Disorder (ADHD) is one of the most common mental disorders in childhood. This study aims to assess the effect of cognitive rehabilitation combined with physical exercise on sustained, selective and alternating attention in ADHD children. Methods: This is a quasi-experimental study with a Pre-test/posttest design. The study population consists of all primary school girls with ADHD in Yazd, Iran. Of these, 40 aged 9-12 years were selected and randomly divided into four groups of cognitive rehabilitation, physical exercise, combined (exercise + rehabilitation), and control. The Conners’ Teacher Rating Scale (CTRS) was used for initial assessment of children, Goodenough- Harris Drawing Test (GHDT) to measure intelligence score, Integrated Visual and Auditory-Continuous Performance Test (IVA-CPT) to assess sustained attention, Wisconsin Card Sorting Test (WCST) to measure alternating attention, and Stroop test to measure selective attention. Fo...

International Journal of Motor Control and Learning

The Clinical Neuropsychologist, 2012