Šiuo metu reabilitacijos įstaigose trūksta paprastų tikslių instrumentinių tyrimų GSI patyrusių pacientų raumenų jėgai matuoti. Svarbu išsiaiškinti, ar instrumentiniai tyrimai naudingi galvos smegenų insultą patyrusiųjų funkcijų atgavimo prognozei. Tyrimo objektas. Galvos smegenų insultu sergančiųjų apatinių galūnių jėgos deficitas (JD). Tyrimo tikslas buvo įvertinti dinamometrinių parametrų informatyvumą galvos smegenų insulto pažeistos motorinės funkcijos atgavimo prognozei. Tiriamųjų kontingentą sudarė 59-73 metų vyrai ir moterys (n=24) sergantys galvos smegenų insultu. Tiriamieji atrinkti naudojantis Pasaulinės Sveikatos Organizacijos pripažintu Barthel indeksu, kuris skirtas vertinti paciento savarankiškumą bei pagal mini mąstymo testą, skirtą protiniam sutrikimui nustatyti. Testavimai buvo atliekami standartinio gydymo laikotarpio reabilitacijos įstaigoje pradžioje bei pabaigoje. Tiriamieji testuoti raumenų jėgos testavimui naudojant manualinį dinamometrą bei Reese NB (2005) “Muscle and sensory testing” protokolą. Buvo registruojamas abiejų kūno pusių maksimalus blauzdos lenkiamųjų, blauzdos tiesiamųjų, pėdos lenkiamųjų ir tiesiamųjų raumenų jėgos dydis. Be šių matavimų, tiriamieji turėjo atlikti atsistojimo-atsisėdimo testą. Visų tirtųjų raumenų jėga reabilitacijos pradžioje buvo asimetriška lyginant sveikąją bei pažeistąją kūno puses. Visų tirtų apatinių galūnių raumenų jėgos dydžio vidurkis abiejose kūno pusėse reabilitacijos pabaigoje reikšmingai padidėjo lyginant... [toliau žr. visą tekstą] / There are not enough simple apparatus methods for the brain stroke suffers strength testing. It is useful to assess if apparatus methods are informative for the brain stroke suffers diaganostic. Subject of the study. Brain stroke suffers strength deficit of lower extremities. Aim. To assess the usefulness of the dynamometric parameters on the prognosis of recovering motor function after stroke. Subjects comprised males men and women aged 59-73 (n=24) with brain stroke. Subjects to be studied were selected according to the Barthel index acknowledged by the World Health Organization; this index is intended to assess patient’s self-dependence. Measurements were taken at a rehabilitation institution in the beginning and at the end of the standard treatment period. The researched people’s muscle strength was tested with a manual dynamometer on a protocol by Reese NB (2005) “Muscle and Sensory Testing”. Maximum values of knee flexors, knee extensors and foot flexor muscles (both dorsal and plantar flexion) of both sides of the body were analyzed. Besides these measurements, a stand-sit test was carried out. In the beginning of the rehabilitation, lower extremities’ muscle strength was asymmetric bilaterally in all of the recruited patients. At the end of the rehabilitation, muscle strength of both sides of the body increased significantly in comparison with the initial value (p<0.05). Muscle strength of the affected side of the body increased more markedly than that of the... [to full text]

Purpose: To investigate the relationship between maximum strength and differences in jump height during weighted and unweighted (body weight) static (SJ) and countermovement jumps (CMJ). Methods: Sixty-three collegiate athletes (mean ± SD; age= 19.9 ± 1.3 y; body mass = 72.9 ± 19.6 kg; height = 172.8 ± 7.7 cm) performed two trials of the SJ and CMJ with 0 kg and 20 kg on a force plate; and two trials of mid-thigh isometric clean pulls in a custom rack over a force plate (1000-Hz sampling). Jump height (JH) was calculated from fight time. Force-time curve analyses determined the following: isometric peak force (IPF), isometric force (IF) at 50, 90, and 250 ms, and isometric rates of force development (IRFD). Absolute and allometric scaled forces, [absolute force/(body mass0.67)], were used in correlations. Results: IPF, IRFD, F50a, F50, F90, and F250 showed moderate/strong correlations with SJ and CMJ height percent decrease from 0 to 20 kg. IPFa and F250a showed weak/moderate correlations with percent height decrease. Comparing strongest (n = 6) to weakest (n = 6): t tests revealed that stronger athletes (IPFa) performed superior to weaker athletes. Conclusion: Data indicate the ability to produce higher peak and instantaneous forces and IRFD is related to JH and to smaller differences between weighted and unweighted jump heights. Stronger athletes jump higher and show smaller decrements in JH with load. A weighted jump may be a practical method of assessing relative strength levels.

Purpose: to examine the relationship between isometric force characteristics (IF) and vertical jump height under various loading conditions. Sixty-three collegiate athletes participated in this investigation. Athletes performed static jump (SJ) and countermovement jumps (CMJ) with 0 and 20kg, and isometric mid-thigh pulls on a force plate. Force-time curve analysis was conducted for each isometric pull and jump to determine force related characteristics. Jump height (JH) was derived from flight time. Isometric forces were normalized using allometric scaling: absolute force/ (body mass(kg)0.67)= IPFa. Results: There was a strong positive correlation between isometric peak force and isometric rate of force development (IRFD). Stronger athletes had smaller decrements in jump height with additional loading. Conclusion: The ability to produce higher peak and instantaneous forces and IRFD is related to JH and smaller differences between weighted and unweighted jumps. A weighted jump may be a practical method of assessing relative strength levels.