Unilateral and Bilateral Muscular Dysbalances of Knee Joint in
Junior Tennis Players – Boys and Girls

J 2018

Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls

VODIČKA, Tomáš, Martin ZVONAŘ, Jiří PAČES, Jiří ZHÁNĚL, Gheorghe BALINT et. al.

Základní údaje

Originální název

Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls

Autoři

VODIČKA, Tomáš (203 Česká republika, garant, domácí), Martin ZVONAŘ (203 Česká republika, domácí), Jiří PAČES (203 Česká republika, domácí), Jiří ZHÁNĚL (203 Česká republika, domácí) a Gheorghe BALINT (642 Rumunsko)

Vydání

BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE, Bacau, Romania, EduSoft Publishing, 2018, 2067-3957

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30306 Sport and fitness sciences

Stát vydavatele

Rumunsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/00216224:14510/18:00104808

Organizační jednotka

Fakulta sportovních studií

UT WoS

000451862700013

Klíčová slova anglicky

Isokinetic Dynamometry; Knee Joint; Muscular Dysbalances; Tennis; Anterior Cruciate Ligament; Injury;

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 2. 5. 2019 14:39, Mgr. Pavlína Roučová, DiS.

Anotace

V originále

Tennis game is typical for high intensity, sudden changes of directions, rapid slow down, acceleration and running for the ball. These movements lead to intensive strain to lower extremities, which is connected with selective activation of muscle groups and their further adaptation. During the muscle adaptation, muscular dysbalances might occur, which can result in an increased incidence of injuries and can be the cause for the reduced ability to maintain a balanced body posture during the game. With regard to this fact, the aim of this study was to establish, the strength level of knee extensors and flexors and assessment of their unilateral and bilateral differences, further to examine the strength level in tennis players group - boys (TEN_M, n=10, aged 13.23 ± 0.51), girls (TEN_F, n=10, aged 13.34 ± 0.69) in comparison with groups of boys (CS_M, n=10, aged 13.04 ± 0.61) and girls (CS_F, n=10, aged 13.21 ± 0.55 let) who do not perform any sport activity. Diagnostics of knee joints strength was carried out by isokinetic dynamometry (Humac Norm CSMI, Stoughton, USA) under two angular velocities (180°/s and 300°/s). Significance of differences in mean values was assessed by using Cohen´s d. Data analysis proved that differences between TEN and CS groups concerning age, body height and weight were insignificant. Comparison of isokinetic strength level (180°/s) between TEN_M and CS_M group proved significantly higher strength level of knee extensors (d=0.75) and flexors (d=1.27) in tennis players dominant extremity. Also for non-dominant leg in TEN_M group, was found significantly higher strength level of extensors (d=0.68) and flexors (d=1.05). Assessment of bilateral differences in strength of knee extensors (d=0.11) and flexors (d=0.05) of dominant and non-dominant extremity in TEN_M group did not prove their significance. Neither in CS_M group was found significant bilateral strength differences between knee extensors (d=0.07) and flexors (d=0.15) of dominant and non-dominant extremity. Comparison of isokinetic strength level (300°/s) between TEN_M and CS_M groups proved significantly higher strength level of knee extensors (d=0.91) and flexors (d=1.48) of dominant extremity in tennis players group. Also in knee extensors (d=0.85) and flexors (d=1.05) of non-dominant extremity, was proved significantly higher strength level in tennis players group. Assessment of bilateral differences in strength of knee extensors (d=0.11) and flexors (d=0.01) of dominant and non-dominant extremity in TEN_M group did not prove their significance. Neither in CS_M group was found significant bilateral strength differences between knee extensors (d=0.10) and flexors (d=0.21) of dominant and non-dominant extremity. Comparison of isokinetic strength level (180°/s) of dominant extremity between TEN_F and CS_F groups did not prove significant differences in the strength of extensors (d=0.46) and flexors (d=0.45). Significant lateral differences in strength level in favour of TEN_F group were however proved in knee extensors (d=0.56) and flexors (d=0.73) on non-dominant extremity. Assessment of bilateral differences in strength of knee extensors (d=0.04) and flexors (d=0.24) of dominant and non-dominant extremity in TEN_F group did not prove their significance. Neither in CS_F group was found significant bilateral strength differences between knee extensors (d=0.12) and flexors (d=0.05) of dominant and non-dominant extremity. Comparison of isokinetic strength level (300°/s) between TEN_F and CS_F group proved significantly higher strength level of knee extensors (d=0.63) of dominant extremity in tennis players group, while the significance of difference was not proved in flexors (d=0.48).

Návaznosti

MUNI/A/1335/2016, interní kód MU

Název: Diagnostika úrovně silových schopností v kontextu vlivu věkových, genderových, somatických a sportovně specifických faktorů.

Investor: Masarykova univerzita, Diagnostika úrovně silových schopností v kontextu vlivu věkových, genderových, somatických a sportovně specifických faktorů., DO R. 2020_Kategorie A - Specifický výzkum - Studentské výzkumné projekty

MUNI/A/1363/2015, interní kód MU

Název: Možnosti využití ruční a izokinetické dynamometrie pro diagnostiku úrovně síly a laterálních asymetrií ve sportu (Akronym: Diagnostika úrovně síly ve sportu)

Investor: Masarykova univerzita, Možnosti využití ruční a izokinetické dynamometrie pro diagnostiku úrovně síly a laterálních asymetrií ve sportu, DO R. 2020_Kategorie A - Specifický výzkum - Studentské výzkumné projekty

Citovat

VODIČKA, Tomáš, Martin ZVONAŘ, Jiří PAČES, Jiří ZHÁNĚL a Gheorghe BALINT. Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls. BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE. Bacau, Romania: EduSoft Publishing, 2018, roč. 9, č. 4, s. 141-153. ISSN 2067-3957.

@article{1475337,
   author = {Vodička, Tomáš and Zvonař, Martin and Pačes, Jiří and Zháněl, Jiří and Balint, Gheorghe},
   article_location = {Bacau, Romania},
   article_number = {4},
   keywords = {Isokinetic Dynamometry; Knee Joint; Muscular Dysbalances; Tennis; Anterior Cruciate Ligament; Injury;},
   language = {eng},
   issn = {2067-3957},
   journal = {BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE},
   title = {Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls},
   url = {http://www.edusoft.ro/brain/index.php/brain/article/view/871},
   volume = {9},
   year = {2018}
}

TY  - JOUR
ID  - 1475337
AU  - Vodička, Tomáš - Zvonař, Martin - Pačes, Jiří - Zháněl, Jiří - Balint, Gheorghe
PY  - 2018
TI  - Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls
JF  - BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE
VL  - 9
IS  - 4
SP  - 141-153
EP  - 141-153
PB  - EduSoft Publishing
SN  - 20673957
KW  - Isokinetic Dynamometry
KW  - Knee Joint
KW  - Muscular Dysbalances
KW  - Tennis
KW  - Anterior Cruciate Ligament
KW  - Injury;
UR  - http://www.edusoft.ro/brain/index.php/brain/article/view/871
L2  - http://www.edusoft.ro/brain/index.php/brain/article/view/871
N2  - Tennis game is typical for high intensity, sudden changes of directions, rapid slow down, acceleration and running for the ball. These movements lead to intensive strain to lower extremities, which is connected with selective activation of muscle groups and their further adaptation. During the muscle adaptation, muscular dysbalances might occur, which can result in an increased incidence of injuries and can be the cause for the reduced ability to maintain a balanced body posture during the game. With regard to this fact, the aim of this study was to establish, the strength level of knee extensors and flexors and assessment of their unilateral and bilateral differences, further to examine the strength level in tennis players group - boys (TEN_M, n=10, aged 13.23 ± 0.51), girls (TEN_F, n=10, aged 13.34 ± 0.69) in comparison with groups of boys (CS_M, n=10, aged 13.04 ± 0.61) and girls (CS_F, n=10, aged 13.21 ± 0.55 let) who do not perform any sport activity. Diagnostics of knee joints strength was carried out by isokinetic dynamometry (Humac Norm CSMI, Stoughton, USA) under two angular velocities (180°/s and 300°/s). Significance of differences in mean values was assessed by using Cohen´s d. Data analysis proved that differences between TEN and CS groups concerning age, body height and weight were insignificant. Comparison of isokinetic strength level (180°/s) between TEN_M and CS_M group proved significantly higher strength level of knee extensors (d=0.75) and flexors (d=1.27) in tennis players dominant extremity. Also for non-dominant leg in TEN_M group, was found significantly higher strength level of extensors (d=0.68) and flexors (d=1.05). Assessment of bilateral differences in strength of knee extensors (d=0.11) and flexors (d=0.05) of dominant and non-dominant extremity in TEN_M group did not prove their significance. Neither in CS_M group was found significant bilateral strength differences between knee extensors (d=0.07) and flexors (d=0.15) of dominant and non-dominant extremity. Comparison of isokinetic strength level (300°/s) between TEN_M and CS_M groups proved significantly higher strength level of knee extensors (d=0.91) and flexors (d=1.48) of dominant extremity in tennis players group. Also in knee extensors (d=0.85) and flexors (d=1.05) of non-dominant extremity, was proved significantly higher strength level in tennis players group. Assessment of bilateral differences in strength of knee extensors (d=0.11) and flexors (d=0.01) of dominant and non-dominant extremity in TEN_M group did not prove their significance. Neither in CS_M group was found significant bilateral strength differences between knee extensors (d=0.10) and flexors (d=0.21) of dominant and non-dominant extremity. Comparison of isokinetic strength level (180°/s) of dominant extremity between TEN_F and CS_F groups did not prove significant differences in the strength of extensors (d=0.46) and flexors (d=0.45). Significant lateral differences in strength level in favour of TEN_F group were however proved in knee extensors (d=0.56) and flexors (d=0.73) on non-dominant extremity. Assessment of bilateral differences in strength of knee extensors (d=0.04) and flexors (d=0.24) of dominant and non-dominant extremity in TEN_F group did not prove their significance. Neither in CS_F group was found significant bilateral strength differences between knee extensors (d=0.12) and flexors (d=0.05) of dominant and non-dominant extremity. Comparison of isokinetic strength level (300°/s) between TEN_F and CS_F group proved significantly higher strength level of knee extensors (d=0.63) of dominant extremity in tennis players group, while the significance of difference was not proved in flexors (d=0.48).
ER  -

VODIČKA, Tomáš, Martin ZVONAŘ, Jiří PAČES, Jiří ZHÁNĚL a Gheorghe BALINT. Unilateral and Bilateral Muscular Dysbalances of Knee Joint in Junior Tennis Players – Boys and Girls. \textit{BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE}. Bacau, Romania: EduSoft Publishing, 2018, roč.~9, č.~4, s.~141-153. ISSN~2067-3957.

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