ORIGINAL_ARTICLE
Editor-in-Chief Message
https://jast.uma.ac.ir/article_686_fd28a559f95b5be3c614e511b4869d95.pdf
2018-07-01
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0
Abbas
Meamarbashi
a_meamarbashi@yahoo.com
1
University of Mohaghegh Ardabili
AUTHOR
ORIGINAL_ARTICLE
Designing a new wearable and Wireless Inertial Measurement Unit for the physical activity monitoring
Physical activity monitoring is important to record all the daily physical activities for the purpose of fitness and health. This motive caused a tremendous progress in the wearable technologies. Current project encompasses 9 degree of freedom inertial sensor (triaxial accelerometer, gyroscope, and magnetometer) with Wi-Fi communication in a very small wearable data logger integrated with a web server. It is applicable as on-body sensor network for more intricate activity recognition applications. Inertial sensor data measured and transferred to either a custom designed web server in online mode or stored in a MicroSD memory card in the offline mode. Wearable data logger with 18×30×30 mm (W×L×H) and 20 grams weight designed and produced. The system was tested at 200 Hz during online mode and acceptable precision and noise ascertained. Current device provided movement recording with wireless communication in small size and low cost to be applicable in the health and fitness applications.
https://jast.uma.ac.ir/article_573_80df8c5caf9fde1e3f590d1c799a8dee.pdf
2018-07-01
1
5
Data Logger
Inertial sensor
Wi-Fi
Fitness
Abbas
Meamarbashi
a_meamarbashi@yahoo.com
1
University of Mohaghegh Ardabili
LEAD_AUTHOR
ORIGINAL_ARTICLE
Dynamic simulation of flexor digitorum longus tendon transfer for flatfoot treatment
Tibialis posterior muscle dysfunction leading to adult acquired flatfoot deformity. Tibialis posterior muscle dysfunction is commonly treated with a flexor digitorum longus tendon transfer to the tubercle of navicular bone. In recent years, the dynamic computer modeling has been used to predict the results of surgical and treatment. The aim of this study was to provide a dynamic computer model of flexor digitorum longus tendon transfer for predicting the outcome of flat foot treatment. In this study the 3D model of ankle joint, which consists of 29 bones and 12 muscles was developed in OpenSim. Using software, ankle plantar flexion moment, metatarsophalangeal joints moment and inversion moment of subtalar joint were drawn. After flexor digitorum longus tendon transfer, there were decreases ankle plantar flexion moment (6.7%), metatarsophalangeal joints moment (45%) and inversion moment of subtalar joint (34%). Plantar flexion moment reduction caused no significant changes in the ankle joint, but reduction in metatarsophalangeal joints could limit heel lift during propulsive phase in walking or running. A decreased inversion moment at the subtalar joint could alter the biomechanics of lower extremities
https://jast.uma.ac.ir/article_581_98859b51f565d59f54c3e9591975fc9b.pdf
2018-07-01
6
14
Flexor digitorum longus tendon
Flatfoot
Modeling
OpenSim
Behrouz
Hajilou
behrouz.hajiloo@yahoo.com
1
Faculty of Sport Science, Bu Ali Sina University, Hamedan, Iran.
LEAD_AUTHOR
Mehrdad
Anbarian
mehrdadanbarian36@gmail.com
2
Bu Ali Sina University, Hamedan, Iran
AUTHOR
Mohammad Hossein
Ghasemi
ghasemi638@yahoo.com
3
Faculty of Sport Science,Bu Ali Sina University, Hamedan, Iran
AUTHOR
Ali
Jalalvand
jalalvand_ali@yahoo.com
4
Department of Physical Education, Faculty of Human Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
AUTHOR
Bahman
Miripour
bmf.hut@gmail.com
5
Dep. of Robotics Engineering, Hamedan University of Technology, Hamedan, Iran.
AUTHOR
ORIGINAL_ARTICLE
Processing and analysis of electroencephalography signal to evaluate the effect of sport advertisement on customers
The purpose of this study was to process and analysis of the electroencephalography signal to assess the effect of sport advertisement on the customers. Forty university student athletes, which were interested and uninterested to the Nike brand were selected (all right handed with 18-25 years old). They were 10 male interested athletic, 10 male uninterested athletes, 10 female interested athletes and 10 female uninterested athletes. When brain waves were registered by the electroencephalography device, Brian mapping software and math analysis used to change information to numeric data. Data analyzing by variant analysis test with Repeated Measures ANOVA and LSD test was done. The results showed that the activity of alpha, beta and theta waves in the interested group had a significant increase. Moreover, the activity of alpha and theta in uninterested group was not significantly different. Results showed that it's possible to find out the effect of sport advertisement Nike brand on brain waves (alpha, beta, delta and theta) by registering the customer's brain waves by electroencephalography. Moreover, by processing and analyzing the signals, we conclude that advertisements increase the amount of analytic and focused thinking, as well as arousal, and can play a significant role into decision making.
https://jast.uma.ac.ir/article_611_f6d44bd9ee7ab96a1b519e9277a7c7bb.pdf
2018-07-01
15
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Electroencephalography
Brain waves
Advertisement
Nike brands
Athletes
Masoud
Darabi
darabimasoud447@gmail.com
1
University of Mohaghegh Ardabili
LEAD_AUTHOR
Nasrin
Azizian
nasrinazizian@yahoo.com
2
Assistant Prof. in Sport Management, University of Mohaghegh Ardebili
AUTHOR
Mehrdad
moharramzadeh
mmoharramzadeh@yahoo.com
3
Professor in Sport Management, University of Mohaghegh Ardebili
AUTHOR
Farzad
Nobakht
nobakht.farzad@yahoo.com
4
University of Mohaghegh Ardabili, Ardabil, Iran
AUTHOR
ORIGINAL_ARTICLE
A New Mathematical Method for the Estimation of Aerobic Threshold in Sports Physiology
Aim: The aim of this study was to determine the aerobic threshold by means of the maximum distance method (Dmax) based on heart rate performance curve (HRPC) in active young men. Methodology: For this purpose, in a laboratory trial, 35 active young men (Age 22.03 ± 2.20 years, Height 176.26 ± 6.65 cm, Weight 68.94 ± 9.56 kg and body fat 17.8 ± 3.41%) were selected on a targeted basis as subjects and executed the Conconi standard protocol. The aerobic threshold of the subjects was determined by means of criterion method (respiratory gas analysis) and maximum distance model based on HRPC. Bland–Altman plots, Intraclass Correlation Coefficient and Paired Sample T-test were used for data analysis. Results: The aerobic threshold of all of the subjects was obtained by the means of the HRPC using the method of Dmax. However, supplementary results revealed that moderate agreement exist between two methods (±1.96; CI = 95%, -35.9 to +32.8 b/min). Similarly, significant but moderate Intraclass Correlations observed (ICC= 0.312), while there was no significant differences exists between two methods (p= 0.599). Conclusion: The application of the Dmax method based on HRPC model in predicting of the aerobic threshold gives us relatively good results. Therefore, the HRPC model can be useful method for predicting the aerobic threshold.
https://jast.uma.ac.ir/article_677_89fa28d7cec5682daea840d7ff4044b9.pdf
2018-07-01
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Aerobic threshold
Maximum distance method (Dmax)
HRPC
Marefat
Siahkouhian
marefat_siahkuhian@yahoo.com
1
Professor in Sport physiology, University of Mohaghegh Ardabili, Ardabil, Iran
LEAD_AUTHOR
Elahe
Mamashli
mamashli.elahe@gmail.com
2
Ph.D Student of Sport Physiology, Faculty of Education and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
AUTHOR
Zohre
BehBudi
z_behboodi@yahoo.com
3
Postdoctoral Research Associate in Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
AUTHOR
Aylar
Imani
aylar_imani1989mu@yahoo.com
4
Ph.D Student of Sport Physiology, Faculty of Education and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
AUTHOR
ORIGINAL_ARTICLE
BeepShuttle Junior: Software for the Administration of the 20m Shuttle Run Test in Children and Adolescents
The 20m shuttle run test (20mSRT) is applied for assessing cardiorespiratory fitness, and is included in many fitness test batteries, such as Eurofit, Alpha-fit, FitnessGram, etc. The aim of this study was to validate software, specially designed by us (BeepShuttle Junior), which administers the 20mSRT, calculates the maximal oxygen uptake (VO2max) in children and adolescents from 6 to 17 years of age, and classifies them in accordance with comprehensive gender- and age-specific international norms. This software supports the administration of the 20mSRT with an appropriate animation and audio signals. The most recent VO2max reference standards were combined in order to assess cardiorespiratory fitness. The results can be exported in an Excel compatible CSV file for additional analyses. A total of 63 children (31 girls and 32 boys) from London, aged from 6 to 9, were tested with the BeepShuttle Junior software, which calculated VO2max and percentile scores for each child. The boys performed significantly better than girls in cardiorespiratory fitness (47.7 ± 3.1 vs 45.9 ± 2.2 ml/kg/min respectively, p < 0.05), but the mean percentile scores for boys and girls were similar (53.2 ± 23.6 and 53.9 ± 22.1 respectively). This software computes the percentile score for the exact age (years, months) and the exact VO2max of each participant by linear interpolation. The individual results and assessments completely matched the interpolated normative data tables.
https://jast.uma.ac.ir/article_676_23c0b583416eac68654bd8a734ef11f3.pdf
2018-07-01
35
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20m shuttle run test
cardiorespiratory fitness
maximal oxygen uptake
children and adolescents
beep test
Stefan
Kolimechkov
dr.stefan.kolimechkov@gmail.com
1
Elite Gymnastics Academy CIC, London, United Kingdom
LEAD_AUTHOR
Lubomir
Petrov
dr.lubomir.petrov@gmail.com
2
Department of Physiology and Biochemistry, Coaching Faculty, National Sports Academy Sofia, Bulgaria
AUTHOR
Albena
Alexandrova
a_alexandrova_bas@yahoo.com
3
National Sports Academy, Sofia, Bulgaria
AUTHOR
Kostadin
Cholakov
mlab@abv.bg
4
Security Solutions Institute ltd, Sofia, Bulgaria
AUTHOR
ORIGINAL_ARTICLE
The Effect of Eccentric Contractions on the Brain Waves Characteristics: A Systematic Review
A growing body of evidence indicates that different neural control strategies may exist for human contractions. This brief systematic review focuses on the specificity of the control strategy used by the central nervous system during eccentric contractions. The findings of previous studies indicate the effects of eccentric exercise on cortical regions and their cooperation as functional networks that support motor functions. Articles were searched in international databases including PubMed, Web of Science and Google Scholar. After initial screening and deleting irrelevant studies, 10 studies were chosen for the analysis. Studies were assessed and analyzed methodologically. Proper interventions were selected according to the least error criteria or the degree of strength. There is lack of study investigating the effects of muscle contraction types (isometric, concentric and eccentric) on the central nervous system, which is reflected in the EEG. Then, further investigations should answer this question: “how does the EEG-measured brain activity for the following bands (delta 1-4 Hz, theta 4-8 Hz, alpha 8-13 Hz and beta 13-20 Hz) change during acute eccentric and concentric contractions”. Moreover, this review highlighted that (1) Few neuroimaging studies have explored the brain activation during eccentric actions, (2) Brain activity in motor-related cortices is higher during eccentric than concentric actions and (3) Prefrontal cortex appears to be highly involved in the regulation of cortical motor drive during eccentric contractions.
https://jast.uma.ac.ir/article_678_3c92ab9ad79fc6a1ac895245a9b63b1a.pdf
2018-07-01
41
48
Eccentric contraction
Brain activation
Electroencephalography (EEG)
Functional magnetic resonance imaging (fMRI)
Ali
Sharifnezhad
a_sharifnezhad@dr.com
1
Sport Biomechanics, Sport Science Reserch Institute of Iran, Tehran, Iran
LEAD_AUTHOR
Moein
Koohestani
koohestanimoein@gmail.com
2
Sport Biomechanics, Sport Sciences, Kharazmi University of Tehran, Tehran, Iran
AUTHOR
Henning
Budde
henning.budde@medicalschool-hamburg.de
3
Faculty of Human Sciences, Medical School Hamburg, Hamburg, Germany
AUTHOR
ORIGINAL_ARTICLE
Farsi Abstracts
https://jast.uma.ac.ir/article_689_0caed2b9aff098fca212d3a35a0a6868.pdf
2018-07-01
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