A KINEMATICIS ANALYSES OF HIGH SCHOOL CHAMPIONSHIP LONG JUMPERS

INTRODUCTION: The purpose of this study was to analyze the long jump event during the Amman School Championship, and to investigate which of the kinematics variables contributed to the distance achieved in the long jump, and to compare the actual distance (AD) achieved by the jumper and the qualified legal distance (LED) judged. METHODS: Fifteen jumpers from Amman Secondary School were filmed at the saggital plane during the execution of three trials of long jumping. A video Camera (Sony) was set at (50) HZ/ second and was perpendicular to the plane of motion. Data from the image of the (TV) were analyzed and the following kinematics variables were calculated: flying angle (FA), take of angle (TOA), landing angle (LA), the vertical flying velocity (VFV), the horizontal flying velocity (HFV), flying velocity (FV). height of the body center of gravity at take off (HCGTO) and at landing (HCGL), take off distance (TOD), flying distance (FD). Landing distance (LD) direct distance of the last three strides from the approach (DDLSS). The data were statistically analyzed using (SAS) packages, whereby the T test and stepwise regression were used. RESULTS: It was found that there were significant differences between the (LED) and the (AD) jumped for the (AD). The (TOA) contributed by 0.39, the (TOA) and (FV) contributed by 0.47, the (TOA) and (FV) and (HCGTO) contributed by 0.61 to the total distance jumped. CONCLUSIONS: It was concluded that the three variables that contributed most to the total distance matched those factors in the Newtonian low of projectiles. It is suggested, therefore, to concentrate on making the approach run accurate and to achieve the maximal velocity for optimizing the three kinematics variables at takeoff

KINEMATICS TECHNIQUES DIFFERENCES IN SELECTED HORIZONTAL BAR MANEUVERS

Performance on the horizontal bars largely depends on swings which are fundamental to executing various skills. The kinematics of swings plays an important role in preliminary execution to predetermine the skill performed, thus, swings may differ from one performing skill to another. The purpose of this study was to investigate the technical differences of the swings when the gymnast performs three different skills on the horizontal bars. these are:1) the backward giant swing (BGS); 2) tkatchev (TC); 3) double back somersault dismount (DBSD)

THE IMPACT OF DETRAINING ON PERFORMANCE AND SOME OF THE BIOMECHANICAL VARIABLES IN TAEKWONDO

Twenty players (aged 9 – 13 yrs) were divided into two equivalent groups ( 10 each ) based on ( age , height , weight , training age and the selected biomechanical variables).The 1st group ( fixed training) trained by the round house kick from ready position (stance) while the 2nd group ( variant training ) trained using different types of the skills’ execution. Both group trained there times a week (75 Minutes) for 6 weeks and measurements were taken for the post test, one week later of detraining and two weeks later of detraining, for fixed training and variant training. No significant differences were observed between the two groups in the posttest and first detraining. It is recommended that both training regimen are important to conserve the level of achieved performance after 2 weeks of detraining

What is the Status of Omani Parents on their Children’s Healthy Lifestyle?

The purpose of this study was to document the significance of the practices employed by parents that contribute to children’s healthy lifestyle in Oman. Those practices encompassed the physical activity and inactivity, sedentary behaviour, nutritional knowledge, and its reflection on their children at early childhood class. Subjects consisted of 237 male and female parents of kindergarten children in the Sultanate of Oman. The researchers developed a twenty-three and a twenty-item questionnaire intended to measure the degree of parent involvement in their children's impact at acceptable levels of validity and reliability. (Amazingly, it was found that parents’ healthy lifestyle were low in their habit practices (low in engagement to physical activity, sports and daily life activity) which showed a trend of sedentary lifestyle. Meanwhile, they did not encourage their children to participate in physical activity nor control them from staying away from being in front of TV screen and video games, too. In addition, their nutritional knowledge also scored low which affected their children’s health negatively. It is, therefore, suggested that lifestyle concept should be inculcated in the learning process for children, and further analysis be made as to what extent the demographic category may influence parents’ involvement towards their children’s healthy lifestyle.

Biomechanics of the clean and jerk in weightlifting national Jordanian team

Seven elite national Jordanian weightlifters were videoed at 50 fields per second from the sagittal plane during the execution of the clean and jerk (C&J) on an AMTI force platform with 3 weights of submaximal lifts; low medium and high weights (35%, 65%, 85%) of their maximum. Linear and angular kinematics of the barbell with the ground reaction forces histories of the lower body were analysed using Kinova & APAS. A significant decrease was found in the maximum vertical velocity of the barbell during the second pull of the heaviest lift (p < 0.05). Maximum extension velocity of the hip joint significantly increased during the first pull of the heaviest lift (p < 0.05). Vertical velocity and maximum bar height decreased during the second pull, especially at 85%. Angle-angle diagrams of the knee and hip profile showed major differences among participants, especially at the 85% lift of their maximum

What is the Status of Omani Parents on their Children’s Healthy Lifestyle?

The purpose of this study was to document the significance of the practices employed by parents that contribute to children’s healthy lifestyle in Oman. Those practices encompassed the physical activity and inactivity, sedentary behaviour, nutritional knowledge, and its reflection on their children at early childhood class. Subjects consisted of 237 male and female parents of kindergarten children in the Sultanate of Oman. The researchers developed a twenty-three and a twenty-item questionnaire intended to measure the degree of parent involvement in their children's impact at acceptable levels of validity and reliability. (Amazingly, it was found that parents’ healthy lifestyle were low in their habit practices (low in engagement to physical activity, sports and daily life activity) which showed a trend of sedentary lifestyle. Meanwhile, they did not encourage their children to participate in physical activity nor control them from staying away from being in front of TV screen and video games, too. In addition, their nutritional knowledge also scored low which affected their children’s health negatively. It is, therefore, suggested that lifestyle concept should be inculcated in the learning process for children, and further analysis be made as to what extent the demographic category may influence parents’ involvement towards their children’s healthy lifestyle

Nutritional Practices of Athletes in Oman: A Descriptive Study

Objective: Adequate dietary intake is crucial for optimum training and performance of athletes. There is almost no available information related to dietary practices among Omani athletes, especially during the competition. This study aimed to assess the nutritional practices (nutritional knowledge, eating habits and daily nutrients intake) among Omani male handball athletes in Muscat city, Oman.Methods: This is a cross sectional study including 35 male handball athletes involved in serious training for no less than three years. Data collection was done through personal interviews using a study questionnaire which enlisted questions relating to socio-demographic information, anthropometric measurements and nutritional practices. All the study participants declared no intake of anabolic steroids.Results: The mean age of the study participants was 27 ± 3 years. Their anthropometric assessment revealed that their mean height was 166 ± 12 cm, mean weight was 75 ± 10 kg, and body mass index was 27 ± 3. Nutritional knowledge analysis revealed that 80% had no nutritional supervision by a nutritionist/dietitian. Their knowledge of nutritional requirements was only 23% correct for total energy intake, 63% for protein intake, 46% for carbohydrate intake, 11% for fat intake and 83% for water intake. Eating habits indicated that 55% had <3 meals/day, 51% had lunch as the principal meal, 51% always added extra salt to their food, 28% took protein supplements on a daily basis, and 51% used pre-competition glycogen load diet. However, none consumed vitamins or mineral supplements. The mean daily caloric intake was 3674 ± 265 kcal/day, which was roughly comprised of 596 ± 66 g carbohydrates, 147 ± 28 g of protein and 78 ± 20 g of total fat.Conclusion: Professional nutritional supervision is needed in order to improve the nutritional knowledge and eating habits of Omani athletes, and therefore improve their athletic performance

Joint Associations of Activity Energy Expenditure and Sedentary Behaviors with Adolescent's Obesity and Dietary Habits

PURPOSE: Physical inactivity and sedentary behaviors are thought to be independent entities and differently associate with adverse health outcomes. Thus, the aim of this study was to investigate the joint associations of physical activity and sedentary behaviors with obesity indices and dietary habits among adolescents from the Gulf Cooperation Council (GCC) countries. METHODS: Data were from the Arab Teens Lifestyle Study (ATLS), a school based, cross-sectional lifestyle study. The present analysis included 6279 adolescents (49.4% males) aged 14-20 years, randomly selected from eight major cities in the GCC countries, using a multistage stratified cluster sampling technique. Anthropometric and self-reported lifestyle data were obtained from participants. Adolescents were classified into four categories: high active & low sedentary (HA-LS), high active & high sedentary (HA- HS), low active & low sedentary (LA-LS) and low active & high sedentary (LA-HS), based on cut off scores of total activity energy expenditure and daily screen time above and below 1680 METs-min/week and above or below 3 hours/day, respectively. RESULTS: Results of MANCOVA tests controlling for age revealed that compared with those with LA-HS, adolescents with HA-LS had signifi cantly (<0.001) lower mean (SD) values for BMI (22.6 (5.5) vs 23.7 (6.2)), waist to height ratio (0.45 (.07) vs 0.48 (.08)), and less frequent intakes of sugar-sweetened drinks (3.7 (2.5) vs 4.5 (2.3)), fast foods (2.2 (1.9) vs 2.9 (1.9)), French fries/potato chips (2.1 (2.0) vs 2.9 (2.1)), cakes/donuts (2.4 (2.1) vs 2.7 (2.1)) and sweets (2.5 (2.1)) vs 3.8 (2.3) but more frequent intakes of breakfast (3.9 (2.7) vs 3.3 (2.6)), vegetables (4.4 (2.3) vs 3.5 (2.4)), fruits (4.2 (2.3) vs 2.8 (2.2)) and milk (4.3 (2.5) vs 3.6 (2.5)). CONCLUSIONS: Adolescents with combined high activity energy expenditure and low sedentary behaviors tend to have lower risk of obesity and have more favorable (healthy) dietary habits. These findings carry important implications for adolescent’s health promotion and obesity prevention.American College of Sports Medicin

The Role of Aerobic Capacity and Strength Levels on Wingate Performance and Lactate Concentrations

Background: Blood lactate (La-) is commonly assessed in tests of sport performance. Sports that utilize intermittent high intensity effort, monitoring of La- from previous exercise can be useful to document intensity of effort. Objective: The purpose of this study was to investigate the role La- played during successive Wingate (Win) tests and subsequent anaerobic exercise performance. Method: Well-trained, national team athletes from Jordan (n = 31) volunteered to participate. A quasi-experimental design was utilized to test Win performance and La- concentration. All participants engage in two Win tests with one minute rest between sets. La- was collected at four time points (prior to Win test 1, immediately after Win 1, after Win 2 and after a 10 minute recovery period). Results: Findings from a multiple linear regression model (p = 0.032) showed increased levels of La- accumulation as a predictor to higher power and strength (p = 0.046). Conversely, peak aerobic capacity was a predictor for decreasing La- accumulation over time (p = 0.039), which may suggest faster recovery. Conclusion: Anaerobic athletes who participate in short, high intense bouts of exercise may require high intensity training programs to increase aerobic fitness, power output, and optimal performance. Practical applications include optimizing training programs to reflect competition