| 摘要 |
An exercising, e.g., waterless swim training apparatus having a frame and a support for the trainee's torso. The torso support is movable along a curve that is convex to the ground below, thus simulating the rocking, or rolling motion experienced in swimming. The frame and body support may be arranged to provide an obstruction free region so that the user can practice breast stroke, butterfly, back stroke and free style strokes without touching any part of the frame, ground, etc. with his/her fingers. The obstruction free zone is roughly a circular hemi-cylinder, extending below the trainee's body. A resistance mechanism is provided to resist motion of the user's hands. The resistance mechanism presents a force versus velocity relationship that simulates the force versus velocity relationship experienced during swimming. One embodiment uses a piston in a fluid filled chamber, such as air, as the resistance mechanism. Over the velocities involved in swimming, such a mechanism simulates the feel of swimming. For the velocities involved in using the swim trainer, the force is approximately proportional to a power of the velocity between two and three.
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