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The bilateral strength and power asymmetries in untrained boys

100%
Maly T., Zahalka F., Mala L., Cech P.
Open Medicine
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2014
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vol. 10
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issue 1
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.
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Evaluation of Postural Stability in Patients with Parkinson Disease

84%
Kłoda M., Brzuszkiewicz-Kuźmicka G., Grzegorzewska J., Białoszewski D.
Advances in Rehabilitation
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2013
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vol. 27
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issue 1
1-7
EN
Introduction: Postural instability is important element of clinical presentation of patients with Parkinson disease. Objective of study was stabilometric evaluation of posture of patients with PD in comparison with healthy ones. Material and methods: 43 patients with PD and 46 healthy persons entered the study. TecnoBody platform was used for stabilometric assessment. Posture stability assessment was performed with and without patient’s sight control. Patients with PD were tested in “on” mode. Results: The results of open eyes test in patients with PD were: P-T speed 11,86 ± 12,5 m/s, P-B speed 8,49±7,4 m/s, perimeter 385,3±368,2mm, ellipse field 388,58 ±658,6mm2. Results obtained in the eyes closed test were: P-T speed 20,44±18 m/s, P-B speed 13,09±10,5 m/s, perimeter 637,21 ±530,9mm, ellipse field 756,16±888,7mm2. Results in healthy controls in open eyes test were: P-T speed 5,23±2 m/s, P-B speed 4,26±1,7 m/s, perimeter 176,67 ±66mm, ellipse field 100,23 ±71,1mm2. Fairly results obtained in eyes shut test were: P-T speed 10,28±4,4 m/s, P-B speed 5,91±3 m/s, perimeter 296,26 ±123,9mm, ellipse field 218 ±140,7mm2. Statistically significant differences (p<0,05) between groups in all four stabilometric parameters in both tests were recorded. Conclusions: 1. Increased deflection of body’s center of gravity in patients with PD causes imbalance which may be a reason of any falls. 2. Positive correlation was observed between age and perimeter values in control group in tests with eyes closed and opened. The correlation was not observed in tested group.
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