| 摘要 |
<p>An exercise device comprises a six sided, hexagonal cylindrical unit, figure 3, that is rolled beneath the feet of the passenger to stimulate blood flow and thus prevent deep vein thrombosis in flight. The cylinder may be formed from a flat packed, pre-shaped, cut and creased corrugated cardboard blank. The blank may be reinforced by litho laminate paper having assembly instructions printed thereon. End flaps (10 and 13, figure 1) may be provided which when folded in increase structural rigidity. Protrusions (2, figure 1) may be provided for extra stimulation of the soles of the feet. The device may be conveniently stored part assembled but flattened (figure 2) in the aeroplane until required and disposed of after use.</p> |
