| 摘要 |
<p>A tubular container<1> with pulleys<4> mounted within the tube, holds twice (or three times) its own length of elasticated cord<5>. A swinging link<2> is attached to a solid object outside a swimming pool and the cord loop<3> is attached to a harness belt on the swimmer, with or without an intervening length of rigid cord. The extensibility of the elasticated cord<6> allows a variable degree of forward movement resulting in semi-static swimming. The compact unit enables its use in pools down to only 3m in length which size shows large savings in capital and running costs, especially with heated pools. The tube also protects the cord from dirt, sunlight and full immersion in water. The device is therefore of value for general exercise, swimming training and remedial purposes. <IMAGE></p> |
