Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 4

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  technical skills
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Defensive actions of world top judoists

100%
Boguszewski D.
Journal of Human Kinetics
|
2011
|
vol. 27
111-122
EN
The objective of this work was to define and determine the effectiveness of defensive actions applied in judo fighting. The study was based on recordings of final fights from Olympic Games, World Championships and World Cup (2005-2008). Actions of female and male contestants participating in total of 56 fights were analyzed (to an accuracy of 10-second-periods of time). All actions, including attacks, counter-attacks and defense without counter-attack, were recorded and their effectiveness, preparatory actions, breaks and the referees' decisions were evaluated. Altogether fights of 95 contestants were subjected to analysis. According to the author's classification of defensive actions, 12 types of defense without counter-attack were defined as follows: (1) hand block, (2) hip block, (3) maneuvering around, (4) twist onto abdomen, (5) hand and hip block, (6) hand block and maneuvering around, (7) stepping aside, (8) separation from grasp, (9) leaving the mat, (10) leg entanglement, (11) bridge, (12) return to tachi-waza (escape from ne-waza). Types of defense most often applied according to the study - hand block and twist onto abdomen - were the least effective (93% and 70% respectively). Ashi-waza and te-waza were throws most often applied as counter-attack. However, sutemi-waza throws were most effectively (50%) applied. Highly effective counter-attacks (28%) should serve as a clue for coaches and athletes at the competitive level. The rules set forth by professor Jigoro Kano (among others: "give up in order to win") may not be adequate for today's competition.
2
Content available remote

Performance Diagnostic in Cross-Country Skiing

100%
Gasser B. A., Hoppeler H. H.
Human Movement
|
2015
|
vol. 16
|
issue 2
83-87
EN
Purpose. Recreational cross-country skiers can benefit from a performance diagnostic when planning a training program. The aim of this study was to establish a simple test protocol to measure endurance capacity and provide training recommendations. Methods. The relationship between endurance performance and cross-country skiing technique was assessed using two tests. First, a lactate threshold test whereby running speed was determined on a treadmill at 4 mmol/l blood lactate concentration. Second, participants completed a variation of the Cooper test using skating technique on flat terrain to determine the distance covered in 12 min and maximum heart rate. Results. There was a correlative (r = 0.18 respectivelly R2 = 0.43) relationship of between the distance covered in the Cooper test and treadmill running speed at 4 mmol/l blood lactate concentration. Conclusions. The two tests allow recreational athletes to rank themselves with regards to their endurance capacity within a population. The relationship between distance covered and maximum heart rate can indicate whether future training should focus on technical or physical improvement.
3
Publication available in full text mode
Content available

The psychophysiological status of the handball players in pre-competitive period correlated with the reactions of autonomic nervous system

100%
Tyshchenko V., Lisenchuk G., Odynets T., Pyptiuk P., Bessarabova O., Galchenko L., Dyadechko I.
|
2020
|
vol. 34
|
issue 1
40-46
EN
Introduction The aim of the study was to analyze the changes in the indices of the autonomic nervous system and the adaptive capacity of Ukrainian Super League handball players prior to significant competitions. Material and methods This research involved 39 handball players from the Ukrainian Super League aged 18–22 years old. The study examined the overall tone of the autonomic nervous system (ANS ) measuring electrodermal activity of the athletes. Reactivity of the ANS of players was monitored by the method of R. Baevskyy, the efficiency of competitive activity in handball was analyzed by the integral index of technical and tactical handball skills. Results Before the competition, the reaction in the sympathoadrenal system was launched for vagotonics as the intended response to the upcoming games. The measured indicators marked mental stress and activation of the sympathoadrenal system for the sympathotonics group. The аtonics group provided the emotional ground due to the balanced influence of para- and sympathetic divisions of the autonomic nervous system. Conclusions The index of functional changes in all participants detected a satisfactory level of adaptation. The highest sympathetic activity was observed for аtonics, the lowest – for vagotonics. The best results were documented for athletes who did not have autonomic dysfunction and those who had a slight predominance of the sympathetic component of the autonomic regulation.
4
Content available remote

Effect of Leg Dominance on The Center-of-Mass Kinematics During an Inside-of-the-Foot Kick in Amateur Soccer Players

88%
Zago M., Motta A. F., Mapelli A., Annoni I., Galvani C., Sforza C.
Journal of Human Kinetics
|
2014
|
vol. 42
|
issue 1
51-61
EN
Soccer kicking kinematics has received wide interest in literature. However, while the instep-kick has been broadly studied, only few researchers investigated the inside-of-the-foot kick, which is one of the most frequently performed techniques during games. In particular, little knowledge is available about differences in kinematics when kicking with the preferred and non-preferred leg. A motion analysis system recorded the three-dimensional coordinates of reflective markers placed upon the body of nine amateur soccer players (23.0 ± 2.1 years, BMI 22.2 ± 2.6 kg/m2), who performed 30 pass-kicks each, 15 with the preferred and 15 with the non-preferred leg. We investigated skill kinematics while maintaining a perspective on the complete picture of movement, looking for laterality related differences. The main focus was laid on: anatomical angles, contribution of upper limbs in kick biomechanics, kinematics of the body Center of Mass (CoM), which describes the whole body movement and is related to balance and stability. When kicking with the preferred leg, CoM displacement during the ground-support phase was 13% higher (p<0.001), normalized CoM height was 1.3% lower (p<0.001) and CoM velocity 10% higher (p<0.01); foot and shank velocities were about 5% higher (p<0.01); arms were more abducted (p<0.01); shoulders were rotated more towards the target (p<0.01, 6° mean orientation difference). We concluded that differences in motor control between preferred and non-preferred leg kicks exist, particularly in the movement velocity and upper body kinematics. Coaches can use these results to provide effective instructions to players in the learning process, moving their focus on kicking speed and upper body behavior
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.