Patent attributes
An exercise tool is provided to ensure a good degree of freedom in the direction of movement of the wrists and allows the magnitude of the load applied to the wrists during the exercise to be changed easily so as to enable more effective strengthening of the deep muscles. The exercise tool has a first rod body 10 and a second rod body 20 which are rotatable in opposite directions and also movable away from each other against the biasing force of a coil spring 70. Ring-shaped latch portions 71 and 72 provided at respective ends of the coil spring 70 are removably latched by first and second elastic-member latch bodies 50 and 60, respectively, so that the coil spring 70 can readily be replaced with another coil spring 70 having a different elastic force, thereby facilitating changing the magnitude of the load applied during the wrist exercise.