Analysis of the beginning of the early flight phase of the ski jump in athletes with different performance levels

Janura, Miroslav; Cabell, Lee; Svoboda, Zdeněk; Elfmark, Milan; Janurová, Eva

doi:10.5507/ag.2011.015

Cited by 7 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparative analysis of sky jumpers technical fitness which is carried out by us is made according to number of scientific works [1,3,7,12,14], in which kinematic indicators of athletes jump technique in different phases are similarly investigated. At the same time information technologies are important component of preparation in ski jumping for a long time by means of which scientists have opportunity to investigate recent trends in jump technique [5,6].…”

Section: Resultsmentioning

confidence: 99%

“…Study and generalization of the scientific-methodical literature; pedagogic observation; video filming with the video analysis on the basis of the software Dartfish (version 4.0). They were carried out according to the recommendations stated in a number of scientific works [3,4,7,12,13,14]. For creation of information database the software Microsoft Access 2016 was used.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the Russian Olympian Ski Jumpers’ Technical Fitness on the Basis of Information Database

Zebzeyev¹,

Zdanovich²

2019

Proceedings of the First International Volga Region Conference on Economics, Humanities and Sports (FICEHS 2019)

View full text Add to dashboard Cite

At the moment many experts, coaches and athletes in ski jumping are focused on search of the most effective ways allowing to increase quality of the training process. At the same time computer technologies are integral part of sport for a long time and are actively used in ski jumping. The aim of the research was to analyze the indicators of the Russian national team in ski jumping members technical fitness on the basis of information database. Examples of the technical fitness analysis are shown on three athletes of the Russian national team who took part in the Winter Olympic Games in Sochi. It is established that the athlete M.M. has erred in flight and contact landing phases (he has insufficiently inclined his trunk). The athlete I.H. has erred in non-contact take-off, flight and contact landing phases (insufficient extension of ankle joint and trunk bending).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Analysis of the Russian Olympian Ski Jumpers’ Technical Fitness on the Basis of Information Database

Zebzeyev¹,

Zdanovich²

2019

Proceedings of the First International Volga Region Conference on Economics, Humanities and Sports (FICEHS 2019)

View full text Add to dashboard Cite

show abstract

“…11 Yet, the athletes have to transfer their CoM anterior, 8 in order to enter the flight phase in an optimal aerodynamic position. 3 This results in reduced drag and increased lift forces. 10 This transfer of the COM is further decisive to control the rotational component of the resulting ground reaction force and therefore determines changes in athlete's angular momentum during the take-off.…”

Section: Discussionmentioning

confidence: 99%

“…1 This is why the take-off has received a lot of attention in biomechanical studies. It was for example shown that elite ski jumpers demonstrate a significant higher knee extension velocity during the take-off compared to athletes of a lower performance level 2 as well as compared to nordic combined athletes 3…”

Section: Introductionmentioning

confidence: 99%

Biomechanical agreement between different imitation jumps and hill jumps in ski jumping

Ketterer

Gollhofer

Lauber

2020

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

Even though the take‐off in ski jumping is decisive, athletes only have a very limited number of training trials on the actual ski jump to practice under real ski jump conditions. Hence, various imitation jumps aiming to mimic the hill jump are performed during daily training. These imitation jumps should therefore mimic the kinematic pattern of hill jumps appropriately. This study aimed to identify imitation jumps that resemble hill jumps regarding four performance‐related biomechanical criteria: maximal vertical take‐off velocity, maximal knee extension velocity, maximal forward‐directed angular momentum and anterior shift of the center of mass. Therefore, a three‐dimensional analysis of the take‐off during six different modalities of imitation jumps as well as hill jumps for validation was carried out in nine professional ski jumpers. Imitation jumps from a rolling platform show better agreement than stationary jumps and three out of the four parameters were best resembled via an imitation jump that included ski jumping boots. Thus, non‐hill take‐off training should be performed with complex imitation jumps to mimic the actual ski jump. Except for the vertical take‐off velocity, we could identify one imitation jump type that is not statistically different to the hill. Consequently, the individual deficiencies of the athletes can be addressed and specifically trained using the appropriate imitation jump. These information about the similarity between imitation jumps and real hill jumps are highly relevant for trainers and athletes in order to effectively design their training programs.

show abstract

“…Reliability based on repeat digitization of a sample sequence was < 1% for temporal and spatial parameters and < 4.5% for velocity parameters. The data were manually digitized by an experienced researcher (Janura, Cabell, Svoboda, Elfmark, & Janurová, 2011;Janura, Cabell, Svoboda, Elfmark, & Zahálka, 2011).…”

Section: Discussionmentioning

confidence: 99%

Kinematic analysis of "Lou Yun" vaults performed by top level male gymnasts: Relationship between kinematic variables and judges' score

Farana¹,

Uchytil²,

Zahradník³

et al. 2013

Acta Gymnica

View full text Add to dashboard Cite

BACKGROUND: In gymnastics judging, evaluation of routines in their execution is based on form and technique displayed during the performance. A vaulting performance takes a short time and is affected by the quantity of biomechanical variables. The significant relationships between the vault score and specific aspects of the gymnast's vault should motivate coaches to monitor these variables as a part of training or routine testing. OBJECTIVE: The purpose of the study was to determine the biomechanical variables that are related to a successful performance of Lou Yun vaults performed by top level male gymnasts during the World Cup competition. METHODS: Ten top-level male gymnasts participated in this study. For the 3D kinematic analysis, two digital camcorders with a frame rate of 50 Hz were used. The data was digitized by Simi Motion software. The Hay and Reid method (1988) was used to identify the biomechanical variables that determine the linear motions of the Lou Yun vaults. A correlation analysis was used to establish the relationship between the biomechanical variables and the judges' scores. The level of statistical significance was determined at the value of p < .05. RESULTS: Six out of 24 examined variables showed significant correlations with the scores. A significant correlation was found in the maximum height of the body centre of mass in the second flight phase (r = .68), in the height of centre of mass at mat touchdown (r = .75), in the relative height from table takeoff to mat touchdown (r =-.85), in the duration of the table contact phase (r =-.71), in the duration of the second flight phase (r = .62) and in the vertical velocity of body centre of mass at table takeoff (r = .70). CONCLUSIONS: The results of the study suggest that a successful execution of Lou Yun vaults and the achievement of a higher score required: to minimize duration of table support phase; to maximize the vertical velocity in the table takeoff phase; to maximize the amplitude of the second flight phase, which is determined by the duration of the second flight phase, by the maximum height of the body centre of mass in the second flight phase, and by the distance from the vaulting table during landing; and to maximize the height of the body centre of mass in the mat contact phase.

show abstract

Analysis of the beginning of the early flight phase of the ski jump in athletes with different performance levels

Cited by 7 publications

References 9 publications

Analysis of the Russian Olympian Ski Jumpers’ Technical Fitness on the Basis of Information Database

Analysis of the Russian Olympian Ski Jumpers’ Technical Fitness on the Basis of Information Database

Biomechanical agreement between different imitation jumps and hill jumps in ski jumping

Kinematic analysis of "Lou Yun" vaults performed by top level male gymnasts: Relationship between kinematic variables and judges' score

Contact Info

Product

Resources

About