Kinematic evaluation of sargent jump with traditional and videography methods among soccer players with genu varus and healthy ones
SEYED MOHSENHOSSEINI1, MOHSEN BARGHAMADI2, HADI ALLAHVERDIDOST3
1- M.S. of Sport Biomechanics, Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of MohagheghArdabili, Ardabil, Iran.Email:[email protected]
2- Assistant Professor of Physical Education, Department of Physical Education and Sport Sciences, University of MohagheghArdabili, Ardabil, Iran. Email: [email protected]
3- M.S. Student of sport biomechanics, Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of MohagheghArdabili, Ardabil, Iran.Email: [email protected]
Abstract:
Introduction & Objective: Vertical jump is one of the most important skills in the implementation of many sports techniques. Considering the importance of obtaining the best possible height for jump activity during skills, many researchers have sought to identify and investigate the variables affecting vertical jump height. The purpose of the present study was Kinematic evaluation of sargent jump with traditional and videography methods among soccer players with genu varus and healthy control ones.
Methodology: According to the subject and aims of the research, the method used in this study was descriptive comparative. The research population consisted of every soccer club players in Ardebil (18 to 25 years old). The samples consisted of 30 soccer players , 15 of whom with genu varus and 15 healthy subjects, divided into two groups. The distance between two femurs internal epicondyls was more than 4 cm. Participat took prt voluntary with available sampling method. Then, Sargent jump was measured in healthy and genu varus groups, with two traditional and videography methods.
In the traditional method, a stopwatch and a strip meter were used to calculate peak time and jump height.
Data were analyzed by SPSS 21 software and independent T-test were used to determine the mean difference between the groups.
Results:The results showed that in healthy group, jump (flight) time by measuring the traditional method was 3/2 bigger than videography method (P <0.0001; median effect size). Also in genu varus group, the jump (flight) time with the traditional method measurement was 3/4 bigger than videography method (P
<0.0001; median effect size). The results showed that jump power in the healthy and the genu varus group in the traditional method was 22/6 bigger than the videography method (P = 0.0001; large effect size). The results showed that the knee angle during stationary in the healthy group was 1/6 bigger than that of the genu varus group (P = 0.009; large effect size). Also, knee angle in the healthy group at the heel contact is 1/1 percent bigger than that of the genu varus group (P = 0.005; large effect size). The ankle angle in the healthy group at the toe off is 1/8 bigger than that of the genu varus group (P = 0.049; median effect size).
Conclusion:. It seems that the video- graphic method, by eliminating human interventions that may have an eye error, has been able to accurately calculate the jump height by accurately recording the toe off and height peak point.
Keywords:traditional method, Videography, genu varus, Kinematic, Sargent jump
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