Force-velocity relationship of the wrist flexors and extensors: The influence of small and large handgrips

Isokinetic concentric and isometric contractions of the wrist flexors and extensors were recorded from 40 young males using a Cybex II + isokinetic exercise system using handgrips of 4 cm and 8 cm diameter: the isokinetic recordings were obtained at velocities of movement of 45degrees/s, 90degrees/s and 180degrees/s. For both muscle groups peak torque and work done both decreased with increased velocity of contraction, however average power increased. The wrist flexors generated significantly (P < 0.01) greater peak torque, work and average power than the extensors, with the extensor/flexor ratio for peak torque being 0.57. No differences were observed between the dominant and non-dominant wrist, or between the size of handgrip used.