Showing 21 results for Type of Study: Applicable
Hamidreza Barzegarpoor, Hamid Rajabi, Saied Mohammadi, Rana Fayazmilani,
Volume 0, Issue 0 (11-2019)
Abstract
Performing a mental exertion during an exercise increase fatigue indices and the amount of fatigue seems to depend on the type of mental exertion. So, the purpose of the present study is comparing the effects of performing types of mental exertion during cycling exercise on fatigue indicators. Methods: 10 cyclist men with average peak power output 236 ± 36 W invited for 5 different sessions. In the first session, anthropometric characteristics and of cycling peak power output (PPO) have determined. In the next four sessions, cycling for 45-min at 65% PPO on the cycle ergometer with (Stroop, AX-CPT and PVT) or without mental exertion. Rate of perceived exertion (RPE) and heart rate were recorded while cycling every 10 min and cortisol concentration was measured before and 30 min after exercise finished. Two-way repeated-measures ANOVAs were used to analyzing data. Results: Performing 45 minutes of Stroop mental exertion during cycling exercise increased RPE and cortisol concentration compared to cycling exercise alone (P˂0/05) but there is no differences between AX-CPT and PVT to cycling exercise alone. Conclusion: The results of the present study showed that performing Stroop mental exertion during the cycling exercise than cycling exercise alone increase more the fatigue indices.
Mrs Elmira Ahmadi, Dr Shahnaz Shahrbanian, Dr Mohamadreza Kordi, Dr Reza Gharakhanlou, Dr Gregory Pearcey,
Volume 0, Issue 0 (11-2019)
Abstract
Fatigue is one of the most common symptoms among individuals with multiple sclerosis (MS). The imbalance of inflammatory cytokines in the brain causes mental fatigue. It is believed that aerobic exercise may moderate the level of inflammation of cytokines and thus reduce mental fatigue. The present study was conducted to investigate the effect of swimming aerobic training on pro-inflammatory factors (interleukin 6) and anti-inflammatory factors (interleukin 10) to evaluate mental fatigue in the brain of female mice after EAE induction. In this research, 21 mice (8 weeks old, 18 to 20 grams) were divided into 3 groups: healthy control, EAE control, and EAE swimming aerobic exercise. The animals in the training group performed moderate-intensity swimming exercises for 4 weeks, 5 sessions per week, 30 minutes per session. The western blot method was used to analyze the research variables. One-way analysis of variance and Tukey's post hoc test were used for statistical analysis. The results showed that there was no significant difference in the amount of IL-6 between the EAE group and swimming training, but the amount of IL10 in the swimming training group showed a significant increase compared to the EAE group. However, the ratio of IL 10/IL 6 values between the swimming training group with EAE was also not significant. It seems that moderate-intensity swimming aerobic exercises, without change in the pro-inflammatory factor, along with driving towards anti-inflammatory factors, with an increase in IL10, can lead to an improvement in the balance of the inflammatory index and a reduction in fatigue between the EAE group and swimming exercise.
Ehsan Abshenas, Mohammad Hossein Alizadeh, Mohsen Naderi,
Volume 0, Issue 0 (11-2019)
Abstract
Introduction and aim: One of the serious challenges in sports is injury prediction methods that can help prevent and reduce injuries. Therefore, the purpose of this research was to answer the question, of Do functional movement screen, Y balance, and landing error scoring system tests have the power to predict sports injuries in female student athletes? Methodology: This study was a prospective cohort study. The population of the current research was university female athletes, and the research sample was 124 female student athletes participating in the 15th Iranian Student Sports Olympiad who were evaluated in an available manner. The Y balance test, landing error scoring system, and functional movement screening test were taken from the subjects before the Olympiad, and the injuries of the athletes during the competitions were recorded by the data collection form. In order to statistically analyze the data, the logistic regression test and Pearson correlation coefficient were used. Results: The results of the research showed that a total of 26 injuries were registered during the competition in 124 subjects. None of the predictor variables had the ability to predict the criterion variable (p>0.05). Conclusion: In general conclusion based on the results of this research, it is not possible to predict general injury using functional tests.
Student Mina Khantan, Professor Behrouz Abdoli, Professor Alireza Farsi,
Volume 0, Issue 0 (11-2019)
Abstract
Transcranial direct current stimulation (tDCS) is one of the newest supplementary method in order to improve the athletic performance and mental preparation of professional athletes. In this study, we investigated the effects of 10-session unihemispheric concurrent dual-site anodal-tDCS (a-tDCS) of the primary motor cortex (M1) and dorsolateral prefrontal cortex (DLPFC), on swimming performance, mental toughness (MT) and perceived exertion. 20 male professional swimmers (Age: 19.00±2.86 yrs) were participated in this randomized, double-blind, and sham-controlled study. 100m free-style swimming test, the sport mental toughness questionnaire (SMTQ) and rating of perceived exertion (RPE) were evaluated as pre-tests. Then, athletes received 10-session tDCS (2mA for 20 min). 48 hrs following 10th session of tDCS, evaluations were repeated. ANCOVA was used for statistical analysis. After multi sessions of tDCS, swimming performance improved significantly (P=0.03) and total MT score increased significantly (P=0.046) and no significant change was observed in RPE. Based on the results of this study, multi-session tDCS along with routine training are recommended to improve swimmers performance and psychological aspects. Therefore, tDCS might be consider as a brain conditioning method.
Zahra Mohammadpour , Karim Azali Alamdari, Azam Zarneshan,
Volume 18, Issue 20 (11-2020)
Abstract
There is a large necessity for met analytic investigation of the blood pressure (BP) response to aquatic exercise training (AET) in hypertensive patients. was to quantify BP changes after (AET) and identify subgroups exhibiting the largest changes. Clinical trials investigating the impact of AET on hypertensive patients published in English and Persian research journals up to July 2020 were searched from google scholar, Pubmed, Science Direct, SID and magiran. Finally, 12 trials were analyzed to quantify effect sizes (difference in means with 95% confidence intervals) using Random Effects model. Subgroup analyses included gender, menopause status, number of sessions per week and training intensity categories. Simple random-effects meta-regression analysis (methods of moment approach) was performed to investigate the association between changes in BP and changes in both training duration and water temperature. AET decreased both SBP and DBP; -12/29 and -5/69 mm Hg respectively, regardless to hypertensive subjects’ characteristics, training session count per week and water temperature. A tendency for larger reductions in SBP with greater reductions in body weight (β1=0.38, P=0.003) and water temperature (β1=1-.29, P=0.012) were observed after AET. In addition, the magnitude of the effect of AET on both SBP and DBP were significant in all subgroups (except for SBP in males) (P <0.05). AET remarkably lowers both SBP and DBP in hypertensive emphasizing on the clinical importance of AET in controlling hypertension. Likewise; it seems more BP reductions could be inevitable in patients with lower body weight and also elevations in water temperature (up to 38 °C). However, more clinical trials still need to be provided because of the lack of evidence and also heterogeneity of the results.
Effat Hosseinzadeh, Mansour Eslami,
Volume 18, Issue 20 (11-2020)
Abstract
Introduction: The ability to attain high level of speed is an essential component of success in many sports fields. However, physical qualities that underpin this ability remain unclear. The purpose of this study was to investigate the role of leg stiffness and vertical stiffness in predicting sprint running. Methods: 50 healthy females were selected among physical education students. The required kinetic and kinetic data were collected in three dimensions. The kinetic and kinematic variables rrunning skill was used to measure both stiffness variables. A multivariate regression model was used to examine the possibility of predicting running speed using leg stiffness and vertical stiffness. Findings: The results of multiple regression showed that there is a significant relationship between the two-leg stiffness and vertical stiffness with mean running speed (R = 0.671), and these two variables can predict 42% of Average speed variation (Adj. R square=0.426). Conclusion: The results of the present study showed that the ability of individuals to sprint running is likely to be significantly dependent on leg stiffness and vertical stiffness. The results of this study can provide important information for designing training programs and talent detection for trainers and specialists in this field.
Maryam Askari, Mohammad Shariatzadeh Joneydi, Hadi Rohani, Sepideh Vakilmahallati,
Volume 18, Issue 20 (11-2020)
Abstract
The aim of this study was to investigate the effect of short-term green tea (matcha) supplementation on fat burning rate during exercise in obese women. The subjects of this study were 10 obese women (36.8±4.7 yrs, BMI 32.6±5.9 kg/m2, weight 83.4±1.9 kg). Subjects consumed 1 g/day matcha for 7 days. An incremental exercise test on a treadmill was performed before and after the supplementation period to measure the maximal fat oxidation (MFO) and corresponding intensity (FATmax). Blood samples were taken before and immediately after the test for measuring the serum levels of Glycerol. Paired t-test and ANOVA was used to compare the means of variables. There was no significant difference in mean FATmax between before and after matcha supplementation (p=0.481). Also, no significant difference was observed in MFO between before and after matcha supplementation (p=0.587). Matcha supplementation after one exercise session did not have a significant effect on plasma glycerol; However, exercise alone reduced plasma glycerol levels. In general, the findings of this study showed that matcha supplementation, at least in short-term period, does not improve the fat oxidation rate and plasma glycerol during exercise in obese women.
Vahideh Teimouri Gholeh Zo, Fatemeh Alirezaei Noghondar, Hamid Reza Taheri,
Volume 18, Issue 20 (11-2020)
Abstract
The purpose of the present study was to investigate the effect of dual task training including balance sit-to-stand and cognitive exercises on postural control of sit to stand of elderly women with a history of falling. 15 elderly women were randomly divided into control (n=7) and experimental (n=8) groups. Participants implemented training protocol for four weeks in both experimental (balance and cognitive exercises) and control groups (balance sit-to-stand exercises). Before and after the training protocol, Berg Balance Scale and time of up and go tests were applied. Besides, in order to measure amplitude and speed of postural sway in the anteroposterior and medio-lateral direction in different stages of sit to stand movement in dual task condition, a force plate with a frequency of 100 Hz was used in pre-test and post-test. For data analysis, paired and independent t-test, nonparametric Wilcoxon and Mann Whitney u-tests were used with a significance level of P≤0.05. The results showed that there was a significant difference in the BERG test and significant reduction of the amplitude and speed of center of pressure in the antero-posterior and medio-lateral directions in the experimental group compared to the control group from pre-test to post-test (P≤0.05). Due to results, balance exercises by dual task method improved control functional balance and reduced postural sway and consequently improved sit to stand postural control in dual task condition and therefore can reduce more effectively the risk of falling in elder people.
Ms. Negar Rostami, Dr. Mohamad Galedari,
Volume 19, Issue 21 (9-2021)
Abstract
Determining the intensity of exercise in children's sports programs has always been very important. The aim of this study was to investigate the rope skipping exercise with three different intensities on the acute response of salivary chromogranin A and alpha-amylase in girl students. 45 fourth grade students were divided into three groups (low, moderate and high intensity). They performed one session of rope skipping with three intensities of 50, 65, and 75% reserve heart rate, according to the metronome rhythm. The reserve heart rate was calculated by the Karvonen method. Samples of salivary immunoglobulin A and cortisol were collected before and immediately after the exercise and measured by the ELISA method. T-test and analysis of variance were used to evaluate the data. Alpha-amylase and chromogranin A increased significantly after all three intensities. It was Also shown that there is no significant difference between intensities in the amount of chromogranin A, While the amount of alpha-amylase in the group with an intensity of 75% of the reserve heart rate was more than 50%. Although more research is needed in this area, according to the present results, it can be said that probably a session of rope skipping with 50% of reserve heart rate has a less increasing effect on salivary alpha-amylase of girl students.
Dr Amir Ghiamirad, Mr Farhad Esmkhani, Mr Salar Hariri,
Volume 19, Issue 22 (12-2021)
Abstract
The aim of this study was to investigate the kinematic characteristics of the two skills of Judan and Chudan Giakozuki Karate, professional and semi-professional male men. Methods: 10 Professional and 10 semi¬-professional amateur male Karate athlethes participated in this study and performed the techniques. The ground reaction force during the impact, which was an indirect parameter to calculate the impact power, was measured using a force plate with a frequency of 250 Hz. The ADXL320 accelerometer was also used to calculate the hand transfer acceleration. The motion data were recorded using Phase Space real time optical tracking system with 8 high speed cameras at 480 fps. Then the kinematic parameters associated with each fist were modeled and quantified by a three-dimensional imaging system.Paired t-test and independent t-test were used to analyze the research data.The test results in the parameters of wrist, elbow, shoulder movement in Judan and Chuadan Gyakozuki skills, ground reaction force, peak speed of elbow and shoulder in Chuan Gyakozuki skill, peak wrist velocity in Judan Gyakozuki skill in semi-professional karate and professional showed a significant difference. Fainaly, the results showed that the type of impact and the level of experience of karatekas were the main factors in determining the size of the displacement parameters and peak velocity, which are considered an important factor in success in competitions and lead to better scores in competitions.
Dr Ali Asghar Ravasi, Dr Mousa Khalafi, Dr Karim Azali Alamdari,
Volume 19, Issue 22 (12-2021)
Abstract
Background and objective: Effects of exercise training on metabolic disorders through modifications in fibroblast growth factor -21 (FGF-21) level are controversial. Therefore, the aim of study was to determine the quantitative effect of exercise training protocols on serum FGF-21 level in adults with metabolic disorders. Methods: A systematic search of the published Persian or English-language studies from PubMed and Google Scholar databases up to march 2021 was done and standardized mean differences (SMDs) were calculated using random-effects models. Results: a total of 14 studies (aerobic training=3, resistance training=3, HIIT=4, concurrent training=4) including on 19 interventions conducted on 503 subjects (with overweight, obesity, type 2 diabetes, metabolic syndrome and or fatty liver disease) were eligible to include in the meta-analysis. However, because of the heterogeneity, the final quantitative impact of 16 interventions was calculated as a declining serum FGF21 level after training [SMD=-0.44(CI: -0.65 to -0.22) p=0.001] which had no correlation with subjects age(p=0.10) or BMI(p=0.50) level. Conclusion: exercise training protocols are efficient tools for a remarkable decrease in serum FGF-21 in patients with metabolic disorders which seems to lead to more beneficial effects on metabolic disturbances. However, more clinical trials are still warranted in this area considering the role of exercise components such as exercise intensity and type
Zahra Ebrahimi, Ebrahim Mohammadali Nasab Firozjah, Sajad Roshani, Mostafa Zareei,
Volume 19, Issue 22 (12-2021)
Abstract
The purpose of this study was to compare the prevalence of injuries in the Iranian Football Premier League players before and after the outbreak of Coronavirus (COVID-19) through video analysis in the 2019-2020 season. The types of sports injuries were divided into acute and chronic categories based on the mechanism, and the injuries were analyzed by reviewing 143 videos from 239 matches. Prevalence, time of onset and affected area were recorded in a special sheet. According to the results, 219 injuries occurred before the outbreak of coronavirus and 276 injuries occurred after the outbreak of coronavirus. In the period before and after the outbreak of Corona virus, the lower limbs of the players (58/7%) were damaged more than other parts of their bodies. Also, the highest rate of injury occurred after the outbreak of coronavirus than before in the last minutes of the game (24/3%). Research Findings showed that the prevalence of injuries in Iranian Premier League football players in the post-outbreak period of Coronavirus increased due to home quarantine and closure of matches.
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Volume 20, Issue 23 (9-2022)
Abstract
Hyper-kyphosis anomalies are common disorders of spine. The aim of this study was to Establishment of dynamic postural assessment indicators in young girls with and without hyper-kyphosis.
In the study, 200 girls were selected according to the angle of kyphosis they were divided into two groups comprising of with and without Hyper-kyphosis. Evaluate dynamic posture, the tests back flattening, wall angle position, bilateral forward reach, pelvic tail tuck, head hanging forward, shoulder mobility, shoulder range in internal rotation and external rotation were used. The results showed a significant difference between the partial and general scores of the dynamic body condition assessment test for girls, with and without Hyper-kyphosis. The normal kyphosis group had better dynamic posture than the Hyper-kyphosis group. Dynamic body posture assessment tests can be considered good tool to assess and identify the limitations and movement disorders of people with Hyper-kyphosis.
Vahideh Ranjbari, Mehdi Rafei Borujeni, Shahram Lenjannejadian,
Volume 20, Issue 23 (9-2022)
Abstract
Introduction and aim: The kinematic analysis of elite athletes’ performance is an important method to determine effective parameters of sport performances. The purpose of the present study was to compare kinematic characteristics of the upper extremity in adolescence and adult players in three-step shoot in Handball. Methods: Nine elite adult handball players working in the Super League (23.55 ± 2.69 years) and ten teen handball players (16.4 ± 0.69 years) participated in this study. The pictures related to the final stage of the shoot were recorded three dimensionally and analyzed by a graphic interface in MATLAB software. The data related to the angular position, angular velocity and peak angular velocity and position corresponding to the upper limb joints of athletes, including the wrist, elbow and shoulder were obtained. Statistical data were used for analysis through student t-test for two independent groups with significance level p ≥ 0.05 in order to compare two groups. Findings: There were significant differences between two groups in angular position of elbow joint during extension at maximum angular velocity and linear velocity of the ball at the time of the release. Conclusion: it seems that other factors than cinematic characteristics such as anthropometric characteristics along with muscle strength in adult are important to get the maximum velocity of ball release.
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Volume 20, Issue 23 (9-2022)
Abstract
Considering the prevalence of pain and disability in the knee joint, the present study investigated the effect of core stability training with improving knee joint proprioception on balance, pain and functional disability of women with chronic knee pain. 20 women aged 30 to 50 with chronic knee pain were placed in two experimental and control groups. To measure static and dynamic balance, pain and functional disability, the stork balance tests, Y, VAS and VOMACK questionnaire were used, respectively. Exercises were followed for eight weeks in the experimental group. To evaluate the research hypotheses, the analysis of variance test with repeated measurements was used in spss software version 24. The results showed that before the exercise protocol, there was no significant difference between the control and experimental groups in any of the measured variables. While the eight-week training protocol caused a significant difference in static and dynamic balance, functional disability and pain between the control and experimental groups. Therefore, core stability training with improving knee joint proprioception increase balance in people with chronic knee pain, which can reduce the risk of falling in these people and improve the quality of life by improving pain and functional disability.
Hossein Nabavinik, Mohsen Ali Darchini, Reza Azimi,
Volume 20, Issue 23 (9-2022)
Abstract
Introduction and Objective: Core stability and plyometric exercises are training methods that athletes use to improve their performance. The purpose of this study was exploring the effect of a period of six week plyometric and core stability exercise on some of physical fitness of boy's athlete. Methods: 36 male athletes who were male with 11-14 years old participated in the semi-experimental study. They randomly divided in three group that each group has 12 subjects (first group; core stability exercise, second group; plyometric exercise and third group; control). The performance tests (standing broad Jump, Vertical Jump, 9.1 m Sprint, Shuttle Run, Flexibility and seated medicine ball toss tests) applied a day before starting core stability and plyometric exercises. Then post-test applied. In order to analysis data, ANOVA test was used (p<0.05). Results: Both core stability and plyometric exercise group showed significance increase in performance tests (Standing Broad Jump, Vertical Jump, 9.1 m Sprint, Shuttle Run). Conclusion: Based on the findings, we recommend the core stability and plyometric exercises in order to improve some of physical fitness of athletes.
Nafise-Sadat Shahamiri, Dr Mohammad-Ali Soleiman-Fallah, Dr Foad Feizolahi,
Volume 20, Issue 24 (3-2023)
Abstract
The aim of this study is the effect of one period core stability exercise with and without kinesio taping on biomechanical effective factors in lower cross syndrome on female. 36 female between 30 to 40 were randomly divided in to 3 groups (control, with taping and without taping). each group consist 12 participant. To measure Pelvic slope, Hip and Knee ROM, Isometric strength of flexors and extensors, Abdominal muscle endurance, Flexibility of spine extensors, Endurance of core muscles, respectively was used Inclinometer, Goniometer, Dynamometer, Body flection test, Body straightening test and Planck test to the side. To evaluate research hypotheses, if there is a significant difference between them we was used analysis of covariance test and multiple comparison in averages with post hoc bonferroni test. The result of the survey indicate that difference between taping and control groups were significant in pelvic slope, hamstring and rectus femoris flexibility, knee and hip flexors muscle strength )p≥0/05(. Difference between without taping and control groups were significant in pelvic slope, rectus femoris and spine extensors flexibility (p≥0/05(. Difference between with and with¬out taping groups were significant in hamstring and iliopsoas flexibility, knee flexors, hip flexors, extensors, adductors strength, core muscles endurance )p≥0/05(. The results show that training with taping has an effective role on reducing lower cross syndrome. So it is suggested that taping can be used as an non-aggressive and low-cost method at the same time with exercise.
Seyed Mohammad Hosseini, Seyed Vahid Seyedazizi, Sahar Bala Khiyavi, Ali Keshtiaray,
Volume 21, Issue 26 (12-2023)
Abstract
The researchers conducted the present study with the aim of investigating the pain and muscle disorders of patients with covid-19 with people who have experienced it. The research was applied and comparative. Samples were calculated using G-power of 303 people, and sports teachers were excluded from the research. The Nordic questionnaire was provided to Ardabil education and training employees after the investigation, the number of people with one year of identification and the number of 113 people with the age range of 30 to 45 years reported no reduction. Then, musculoskeletal disorders of 9 body areas in both groups were evaluated using descriptive statistics and chi-square test at a significance level of 0.01. The muscle pain of the affected group was significantly (P<0.01) higher than that of the healthy group, and also based on the chi-square test, the amount of back and neck pain was 52% and 45%, respectively, in affected people compared to other organs. It was more meaningful. (P<0.01) noticed that there was no significant difference between the pain and discomfort of different organs in the non-observed group. Corona patients may experience pain, and the cause of it in the Nordic questionnaire, in addition to physical abnormalities and excessive muscle disease, can be from Corona disease; Therefore, the Nordic questionnaire should be used.
Narmin Ghanizadeh Hesar, Behnam Moradi, Marzieh Musa Gholizadeh Fallah,
Volume 21, Issue 26 (12-2023)
Abstract
Upper-crossed syndrome is one of the most common disorders of the upper body, which is associated with 45-65% of shoulder pain. This study has been conducted to investigate the effect of corrective exercises focused on chain reactions, on scapular position, proprioception and shoulder functional stability of female students with UCS. 30 female students between 14 and 18 years of age in Urmia city who had the mentioned disorder were selected using the purposive sampling method and were randomly divided into two experimental groups (15 people) and control (15 people). A tape measure was used to evaluate the distance between the median of the sternum to the coracoid ridge and the posterior-lateral distance of the acromion to the thoracic vertebra (scapular position), the Layton flexometer to measure proprioception, the Y Balance Test to evaluate the function of the upper limb, and the goniometer, tape measure and flexible ruler, respectively were used to measure head and shoulder forward angle and kyphosis. Independent and dependent t-tests were used to compare inter-group and intra-group means, respectively. The present study showed that the effect of corrective exercises on scapular position, proprioception and shoulder functional stability of female students with UCS was significant.
Masoud Barzegar, Malihe Hadadnezhad, Sadredin Shojaedin, Amir Letafatkar, Rose Fouladi,
Volume 21, Issue 26 (12-2023)
Abstract
The aim of this research was effect of eight weeks of neuromuscular training (NMT) with and without cognitive-dual tasks (DTs) on proprioception and balance of athletes with ACL deficiency (ACL-D). 39 soccer players with ACL-D were selected purposefully and randomly divided into three groups of 13 (control group, neuromuscular training group and neuromuscular training with dual tasks group). Two training groups performed the exercises for eight weeks and three sessions per week. cognitive-motor dual tasks were performed in one of the groups along with neuromuscular exercises in the form of counting down numbers, memorizing numbers, calculating unexpected equations, specialized football skill movements. The results of the current study indicated that there was no significant difference in knee joint proprioception in the open and closed kinetic chain after applying the intervention between the three groups, but there was a significant difference in lower extremity performance of the athletes based on the Y balance test in the anterior and posterior-lateral direction between the three groups (p<0.05). It seems that providing neuromuscular exercises along with cognitive-dual tasks can probably be considered as a useful approach to improve lower extremity performance based on the Y balance test in athletes with anterior cruciate ligament deficiency.
