The bilateral strength and power asymmetries in untrained boys

• Autorzy: Tomas Maly , Frantisek Zahalka , Lucia Mala , Pavol Cech
• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to identify the level of isokinetic strength and power of lower limbs in 13-year- old untrained boys (n=22, height: 158.5±8.0 cm, mass: 49.1±12.6 kg), to determine bilateral deficit between the limbs in the tests and examine their mutual relationship. Maximum peak muscle torque of knee extensors (PTQ) and flexors (PTH) on dominant (DL) and non-dominant leg (NL) were measured by isokinetic dynamometer. Three types of a vertical jump: countermovement jump with (CMJFA) and without arms (CMJ) and squat jump (SJ) were performed on two force platforms. We found the significant effect (p<.01) of independent vari- ables (knee extensors, flexors, AV) and their interaction on PT. AV did not indicate any significant effect on bilat- eral ratio of knee extensors (F4,84=.74, p>.05, ηp2=0.03), however a significant effect of AV was found in knee flexors (F4,84=2.70,p<.05, ηp2=.114). The type of jump had no effect on the difference between force exerted by DL and NL (F1,21=.102, p>.05, ηp2=.01). Bilateral deficit (Q:Q, H:H) did not significantly correlate with bilateral deficit in jumps (p>.05). Despite the possibility of identifying muscle asymmetries in the sense of strength imbalances, their mutual relation- ship with results in isokinetic dynamometry and power jump tests is still unclear.

Słowa kluczowe

EN

Isokinetic testing; vertical jump; injury prevention; youth; symmetry; imbalance; health

• Czasopismo: Open Medicine
• Rocznik: 2014
• Tom: 10
• Numer: 1

Daty

online

2015-04-01

Twórcy

autor

Tomas Maly

• Faculty of Physical Education
  and Sport, Charles University in Prague, Prague, Czech Republic

autor

Frantisek Zahalka

• Sport Research Centre, Faculty of Physical Education and Sport, Charles University in Prague, Czech
  Republic

autor

Lucia Mala

• Sport Research Centre, Faculty of Physical Education and Sport, Charles University in Prague, Czech
  Republic

autor

Pavol Cech

• Department of Sport Kinanthropology, Faculty of Sports,
  University of Presov in Presov, Slovak Republic

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Identyfikatory

DOI

10.1515/med-2015-0034