| 摘要 |
PROBLEM TO BE SOLVED: To provide a playground in water and shoes for exercise used for the same which make exercise in water easy and more effective. SOLUTION: A playground in water, where an iron sheet 1 is laid down on the bottom of a pool P or a water tank, is provided and shoes 2 and 2 on the soles of which magnets are attached are used for walking on this iron sheet 1 and the walking posture becomes stable as the feet are attracted on the iron sheet 1 and amt. of exercise is increased by peeling off the attracted soles.
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