| 摘要 |
A roller skating practice and exercise apparatus for combined upper body and lower body exercise has a skating platform with an upper surface for supporting a user wearing a pair of roller skates or in-line skates. The skating platform is foldable for easier portability and storage of the apparatus. Two extensible telescoping arm exercising poles are pivotally attached to the skating platform. The telescoping poles are constructed to provide axial resistance and rotational resistance to pivotal motion in all directions. An elastic tension member inside the hollow telescoping poles provides resistance to axial motion when the arm exercising poles are extended. The resistance to axial motion varies directly with the amount of displacement of the pole from its contracted position. The rotational resistance is provided by ball-and-socket joints which join the lower ends of the telescoping poles to the skating platform. The geometry of the ball-and-socket joints provides pivotal motion with rotational resistance in all directions. The ball-and-socket joints are adjustable to provide varying degrees of rotational resistance. The telescoping poles are removable for easier portability and storage of the apparatus. The full range of lower body movement in combination with the axial and rotational resistance of the telescoping poles allows a varied and complete workout for practicing the skills needed for roller skating and roller dancing while simultaneously training for improved strength and endurance.
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