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41.
Diagnostic balance tests for assessing risk of falls and distinguishing older adult fallers and non-fallers : a systematic review with meta-analysis
Žiga Kozinc, Stefan Loefler, Christian Hofer, Ugo Carraro, Nejc Šarabon, 2020, pregledni znanstveni članek

Opis: : Falls are a major cause of injury and morbidity in older adults. To reduce the incidence of falls, a systematic assessment of the risk of falling is of paramount importance. The purpose of this systematic review was to provide a comprehensive comparison of the diagnostic balance tests used to predict falls and for distinguishing older adults with and without a history of falls. We conducted a systematic review of the studies in which instrumented (force plate body sway assessment) or other non-instrumented balance tests were used. We analyzed the data from 19 prospective and 48 retrospective/case-control studies. Among the non-instrumented tests, the single-leg stance test appears to be the most promising for discrimination between fallers and non-fallers. In terms of body sway measures, the center-of-pressure area was most consistently associated with falls. No evidence was found for increased benefit of the body sway test when cognitive tasks were added, or the vision was eliminated. While our analyses are limited due to the unbalanced representation of different test and outcome measures across studies, we can recommend the single-leg test for the assessment of the risk of falling, and the measurements of body sway for a more comprehensive assessment.
Ključne besede: older adults, falls, fall history, body sway, functional reach, single-leg test, Romberg test
Objavljeno v RUP: 10.09.2020; Ogledov: 1339; Prenosov: 63
URL Povezava na celotno besedilo

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Vpliv vadbe proti uporu na posturalno ravnotežje : sistematičen pregled z metaanalizo
Klemen Čretnik, 2020, diplomsko delo

Ključne besede: moč, jakost, ravnotežje, stabilnost, poškodbe, spodnje okončine
Objavljeno v RUP: 09.09.2020; Ogledov: 1855; Prenosov: 196
.pdf Celotno besedilo (1008,62 KB)

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Poškodbe kolka in dimeljskega predela pri vadečih s kompleksnimi vajami za moč : diplomska naloga
Daniel Djurić, Nejc Šarabon, 2020, diplomsko delo

Objavljeno v RUP: 08.09.2020; Ogledov: 1344; Prenosov: 113
URL Povezava na celotno besedilo
Gradivo ima več datotek! Več...

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Effects of eccentric training at long muscle length on architectural and functional characteristics of the hamstrings
Jan Marušič, Rok Vatovec, Goran Marković, Nejc Šarabon, 2020, izvirni znanstveni članek

Opis: Hamstring strain injuries during sprinting or stretching frequently occur at long-muscle length. Yet, previous research has mainly focused on studying the effectiveness of eccentric hamstring strengthening at shorter muscle length on hamstring performance, morphology, and hamstring strain injury risk factors. Here, we evaluated the effects of 6-week eccentric hamstring training at long-muscle length on functional and architectural characteristics of the hamstrings. Healthy and injury-free participants (n = 40; age 23.7 % 2.5 years) were randomly assigned to control or intervention group. Training intervention consisted of 12 sessions with two eccentric hamstring exercises in a lengthened position. Outcome measures included isokinetic and isometric knee flexion peak torque, Nordic hamstring exercise peak torque, voluntary activation level, and countermovement jump performance. Ultrasonography was used to determine muscle thickness, pennation angle, and fascicle length of biceps femoris long head (BFlh). A significant time % group interaction effect was observed for all measured parameters except countermovement jump performance and muscle thickness. The training intervention resulted in increased concentric and eccentric knee flexion peak torque at 60°/s (d = 0.55-0.62, P = .02 and .03) and concentric peak torque at 180°/s (d = 0.99, P = .001), increased isometric knee flexion peak torque (d = 0.73, P = .008) and Nordic hamstring exercise peak torque (d = 1.19, P < .001), increased voluntary activation level (d = 1.29, P < .001), decreased pennation angle (d = 1.31, P < .001), and increased fascicle length (d = 1.12, P < .001) of BFlh. These results provide evidence that short-term eccentric hamstring strengthening at long-muscle length can have significant favorable effects on various architectural and functional characteristics of the hamstrings.
Ključne besede: biceps femoris, fascicle length, knee flexion torque, pennation angle, strength
Objavljeno v RUP: 07.08.2020; Ogledov: 2187; Prenosov: 61
URL Povezava na celotno besedilo

46.
Introduction of dynamic rate-of-force development scaling factor in progressive drop jumps
Nejc Šarabon, Olivera M. Knezevic, Dragan Mirkov, Darjan Smajla, 2020, izvirni znanstveni članek

Opis: Rapid force generation across submaximal levels has been evaluated with the rate of force development scaling factor (RFD-SF) in different isometric tasks, while such measurement was still not verified in dynamic tasks. Our study was designed to evaluate the feasibility of the RFD-SF in dynamic drop jump (DJ) task (RFD-SFDJ). A total of 55 young athletes performed isometric plantarflexion at different submaximal intensities and 60 DJs (6 different drop heights). For each participant we calculated linearity (r2 ) and slope in isometric task (RFD-SFPF), eccentric part of DJ (RFD-SFDJ-ECC) and concentric part of DJ (RFD-SFDJ-CON), as well as average jump height (DJH) from each drop height. Our results revealed strong linear force-RFD relationship for isometric plantarflexion (r2 = 0.90 % 0.06), eccentric (r2 = 0.87 % 0.09) and concentric phase of DJ (r2 = 0.80 % 0.18). Significant moderate positive correlations were calculated between RFD-SFPF and RFD-SFDJ-ECC (r = 0.311, p < 0.05) and small negative correlations between RFD-SFDJ-CON and RFD-SF (r = -0.276, p < 0.05). Significant positive moderate correlations were seen only between RFD-SFDJ-ECC and DJH from 10 cm (r = 0.459, p < 0.001) and 15 cm (r = 0.423, p < 0.01). This is the first study to introduce and confirm that RFD-SFDJ can be obtained from the multi-joint tasks (60 jumps) and still provide acceptable reliability and linear relationship. Furthermore, RFD-SFDJ may have greater practical application than RFD-SF assessed under the isometric conditions. This verification of RFD-SFDJ opens opportunities for further research regarding its practical application.
Ključne besede: explosive strength, stretch-shortening cycle, plyometric, ankle, isometric
Objavljeno v RUP: 07.08.2020; Ogledov: 2037; Prenosov: 71
URL Povezava na celotno besedilo

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