The bilateral strength and power asymmetries in untrained boys

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 tor...

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Bibliographic Details
Published in:Open medicine (Warsaw, Poland) Poland), 2015-01, Vol.10 (1), p.224-232
Main Authors: Maly, Tomas, Zahalka, Frantisek, Mala, Lucia, Cech, Pavol
Format: Article
Language:English
Subjects:
health
imbalance
injury prevention
Isokinetic testing
symmetry
vertical jump
youth
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Summary: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.05, ηp2=0.03), however a significant effect of AV was found in knee flexors (F4,84=2.70,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.
ISSN:2391-5463
2391-5463
DOI:10.1515/med-2015-0034