Iskanje po repozitoriju

Ključne besede: vadba na osnovi izgube hitrosti, prag izgube hitrosti, moč, jakost, hitrost
Objavljeno v RUP: 18.08.2023; Ogledov: 99; Prenosov: 8
Polno besedilo (1,27 MB)

Ključne besede: ahilova peta, ekscentrična vadba, ahilarna tendinopatija, poškodba
Objavljeno v RUP: 22.12.2021; Ogledov: 670; Prenosov: 65
Polno besedilo (3,55 MB)

Ključne besede: hitra sprememba smeri, agilnost, ekscentrična mišična zmogljivost, ekscentrično mišično krčenje
Objavljeno v RUP: 20.12.2021; Ogledov: 572; Prenosov: 47
Polno besedilo (673,14 KB)

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: 1335; Prenosov: 66
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