TY  - JOUR
AU  - Chow, J.W.
A2  - Chow, J.W.
A2  - Darling, W.G.
A2  - Hay, J.G.
DB  - BISp
DP  - BISp
KW  - Beinstreckkraft
KW  - Beschleunigung
KW  - Biomechanik
KW  - Dynamometer
KW  - Gelenkwinkel
KW  - Kraft-Geschwindigkeits-Verhältnis
KW  - Kraftmessung, isokinetische
KW  - Kraftmoment
KW  - Skelettmuskulatur
KW  - Sportmedizin
KW  - Winkelgeschwindigkeit
LA  - eng
TI  - Mechanical characteristics of knee extension exercises performed on an isokinetic dynamometer
TT  - Mechanische Merkmale von Kniestreckuebungen auf einem isokinetischen Dynamometer
PY  - 1997
N2  - The purpose of this study was to evaluate selected mechanical characteristics of knee extension exercises performed on a LIDO Active Isokinetic System. A female subject performed two repetitions of maximal effort knee extension at 16 different preset angular velocities (PAVs). The gravitational and inertial effects were included in the computation of the resultant knee torque. For each repetition, the knee flexion angle, the angular velocity and acceleration of the shank, and the knee torque throughout the range of motion were computed. The shank angular acceleration values indicated that if the inertial effect is not considered the knee torque will be underestimated in the initial phase and errors in knee torque up to about 6 N/m can be expected for the rest of the repetition. The durations when the shank angular velocity was within +/-5% and +/-10% of PAV (expressed as percentages of the repetition time) were found to decrease with increasing PAV. The difference between PAV and shank angular velocity at the instant of peak torque also increased with increasing PAV. The results demonstrate the limitations that may exist in isokinetic dynamometers.   Verf.-Referat
SP  - S. 794-803
SN  - 0195-9131
JO  - Medicine and science in sports and exercise
IS  - 6
VL  - 29
M3  - Gedruckte Ressource
ID  - PU199801209129
ER  -