ABSTRACT
The football kick involves knee extension velocities of 14–16 rad/s reached just before ball impact (Miller and Nelson, 1973). In contrast, the maximal angular velocity applied in isokinetic strength measurements has generally not exceeded 4.36 rad/s (250 °/s). Therefore a non-isokinetic method was developed to determine muscle moment, muscle power and joint angular velocity during very fast movements. One purpose was to obtain the moment-velocity and power-velocity relations of the knee extensors during slow to very fast knee extensions. Another purpose was to examine the effect of different kinds of strength training on these relations. Finally, the functional significance of the different kinds of strength training was examined.
