angular velocity

The fencing lunge is one of the most common and fundamental attacking moves in fencing. The aim of this study was to provide kinematical compare of upper extremity among elite female and male senior fencers when performing a lunge.  Four female and four male members of Iran National Team were selected as research sample. The participants were filmed when performing a complete lunge with a camera of 300 Hz sampling rate to evaluate kinematical parameters. The student's-t test revealed that elite male fencers had significantly shorter reaction and movement time comparing with elite female fencers. No major differences in other kinematic parameters indicate that elite male and female fencers performed lunge in similar way. The final conclusion of this study is that the existing differences in time of lunge technique may suggest the need for alternative training strategies to prepare fencing athletes.The examination of the kinematic analysis of the upper body in male and female elite fencers demonstrated that the dissimilarity in the execution speed of the lunge technique between the two genders cannot be accounted for by kinematic changes in joint movements. The differences highlighted in this study can serve as a basis for formulating distinct training and coaching strategies, with the aim of better preparing athletes for decision making and quick movements.

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.

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.

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.

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.

The proper implementation of Dachi in karate as a basic technique has a direct impact on the implementation of other techniques. Therefore, the aim of the present study was to compare the maximal angular velocity of hip, knee and ankle joints in differen  Zenkotsu dachi techniques in karate.

12 male karate athletes (Height 175 ± 5, mass 75 ± 5, Age 25 ± 5, Background 8 ± 2) participated in this test .A three-dimensional analyzer(motion analyzer),with six matched infrared cameras at a speed of 200 frames per second was used. And  records were analyzed by cortex2.5.0 software. The normality of the data distribution was confirmed by Shapirovilk test. To test the hypotheses of the research, the data were analyzed by repeated measures ANOVA and Bonferroni post hoc test at the significant level of 0.05 using statistical software (SPSS 25).

In this research, we performed Zenkotsu dachi forward movement in six different ways, and the results show that there is a significant difference only between the third and fourth methods and also between the fourth and fifth methods in the hip joint If there is no significant difference in knee joint and ankle joint in any of the methods. Because each of these methods changes the position and range of motion of the hip and pelvic floor muscles.

By sitting more forward and lower back flexing, the individual optimizes the involved limbs and muscles and creates greater angular velocity in the hip joint.