A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors
Samo za registrovane korisnike
2017
Autori
Grbić, VladimirĐurić, Sasa
Knežević, Olivera
Mirkov, Dragan M.
Nedeljković, Aleksandar
Jarić, Slobodan
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Single outcomes of standard isokinetic dynamometry tests do not discern between various muscle mechanical capacities. In this study, we aimed to (1) evaluate the shape and strength of the force-velocity relationship of knee extensors, as observed in isokinetic tests conducted at a wide range of angular velocities, and (2) explore the concurrent validity of a simple 2-velocity method. Thirteen physically active females were tested for both the peak and averaged knee extensor concentric force exerted at the angular velocities of 30 degrees-240 degrees/s recorded in the 90 degrees-170 degrees range of knee extension. The results revealed strong (0.960 lt R lt 0.998) linear force-velocity relationships that depict the maximum muscle force (i.e. the force-intercept), velocity (velocity-intercept), and power (their product). Moreover, the line drawn through only the 60 degrees and 180 degrees/s data (the 2-velocity method') revealed a high level of agreement with the force-velocity relations...hip obtained (0.76 lt R lt 0.97; all power lt 0.001); while the force-intercept highly correlated (0.68 lt R lt 0.84; all power0.01) with the directly measured isometric force. The 2-velocity method could therefore be developed into a standard method for isokinetic testing of mechanical capacities of knee extensors and, if supported by further research, other muscles. This brief and fatigue-free testing procedure could discern between muscle force, velocity, and power-producing capacities.
Ključne reči:
muscle / force / velocity / power / quadriceps / linear regressionIzvor:
International Journal of Sports Medicine, 2017, 38, 10, 741-746Izdavač:
- Georg Thieme Verlag Kg, Stuttgart
Finansiranje / projekti:
- Mišićni i neuralni faktori humane lokomocije i njihove adaptivne promene (RS-MESTD-Basic Research (BR or ON)-175037)
- Neinvazivna modulacija kortikalne ekscitabilnosti i plasticiteta - Razvoj metoda neinvazivne neuromodulacije centralnog nervnog sistema u ispitivanja fizioloških mehanizama, dijagnostici i terapiji (RS-MESTD-Basic Research (BR or ON)-175012)
DOI: 10.1055/s-0043-113043
ISSN: 0172-4622
PubMed: 28768340
WoS: 000409193400003
Scopus: 2-s2.0-85027031729
Institucija/grupa
Institut za medicinska istraživanjaTY - JOUR AU - Grbić, Vladimir AU - Đurić, Sasa AU - Knežević, Olivera AU - Mirkov, Dragan M. AU - Nedeljković, Aleksandar AU - Jarić, Slobodan PY - 2017 UR - http://rimi.imi.bg.ac.rs/handle/123456789/773 AB - Single outcomes of standard isokinetic dynamometry tests do not discern between various muscle mechanical capacities. In this study, we aimed to (1) evaluate the shape and strength of the force-velocity relationship of knee extensors, as observed in isokinetic tests conducted at a wide range of angular velocities, and (2) explore the concurrent validity of a simple 2-velocity method. Thirteen physically active females were tested for both the peak and averaged knee extensor concentric force exerted at the angular velocities of 30 degrees-240 degrees/s recorded in the 90 degrees-170 degrees range of knee extension. The results revealed strong (0.960 lt R lt 0.998) linear force-velocity relationships that depict the maximum muscle force (i.e. the force-intercept), velocity (velocity-intercept), and power (their product). Moreover, the line drawn through only the 60 degrees and 180 degrees/s data (the 2-velocity method') revealed a high level of agreement with the force-velocity relationship obtained (0.76 lt R lt 0.97; all power lt 0.001); while the force-intercept highly correlated (0.68 lt R lt 0.84; all power0.01) with the directly measured isometric force. The 2-velocity method could therefore be developed into a standard method for isokinetic testing of mechanical capacities of knee extensors and, if supported by further research, other muscles. This brief and fatigue-free testing procedure could discern between muscle force, velocity, and power-producing capacities. PB - Georg Thieme Verlag Kg, Stuttgart T2 - International Journal of Sports Medicine T1 - A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors EP - 746 IS - 10 SP - 741 VL - 38 DO - 10.1055/s-0043-113043 ER -
@article{ author = "Grbić, Vladimir and Đurić, Sasa and Knežević, Olivera and Mirkov, Dragan M. and Nedeljković, Aleksandar and Jarić, Slobodan", year = "2017", abstract = "Single outcomes of standard isokinetic dynamometry tests do not discern between various muscle mechanical capacities. In this study, we aimed to (1) evaluate the shape and strength of the force-velocity relationship of knee extensors, as observed in isokinetic tests conducted at a wide range of angular velocities, and (2) explore the concurrent validity of a simple 2-velocity method. Thirteen physically active females were tested for both the peak and averaged knee extensor concentric force exerted at the angular velocities of 30 degrees-240 degrees/s recorded in the 90 degrees-170 degrees range of knee extension. The results revealed strong (0.960 lt R lt 0.998) linear force-velocity relationships that depict the maximum muscle force (i.e. the force-intercept), velocity (velocity-intercept), and power (their product). Moreover, the line drawn through only the 60 degrees and 180 degrees/s data (the 2-velocity method') revealed a high level of agreement with the force-velocity relationship obtained (0.76 lt R lt 0.97; all power lt 0.001); while the force-intercept highly correlated (0.68 lt R lt 0.84; all power0.01) with the directly measured isometric force. The 2-velocity method could therefore be developed into a standard method for isokinetic testing of mechanical capacities of knee extensors and, if supported by further research, other muscles. This brief and fatigue-free testing procedure could discern between muscle force, velocity, and power-producing capacities.", publisher = "Georg Thieme Verlag Kg, Stuttgart", journal = "International Journal of Sports Medicine", title = "A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors", pages = "746-741", number = "10", volume = "38", doi = "10.1055/s-0043-113043" }
Grbić, V., Đurić, S., Knežević, O., Mirkov, D. M., Nedeljković, A.,& Jarić, S.. (2017). A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors. in International Journal of Sports Medicine Georg Thieme Verlag Kg, Stuttgart., 38(10), 741-746. https://doi.org/10.1055/s-0043-113043
Grbić V, Đurić S, Knežević O, Mirkov DM, Nedeljković A, Jarić S. A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors. in International Journal of Sports Medicine. 2017;38(10):741-746. doi:10.1055/s-0043-113043 .
Grbić, Vladimir, Đurić, Sasa, Knežević, Olivera, Mirkov, Dragan M., Nedeljković, Aleksandar, Jarić, Slobodan, "A Novel Two-Velocity Method for Elaborate Isokinetic Testing of Knee Extensors" in International Journal of Sports Medicine, 38, no. 10 (2017):741-746, https://doi.org/10.1055/s-0043-113043 . .