Meet the Wonder Core Smart: an exercise tool that lets you work on your upper middle and lower abs and obliques. It has dual resistance springs for core strengthening moves. You get 8 different workout options to choose from (bicycling, scissor kicks, sit ups, push ups, and more).
Hot Computer Stuff
Wonder Core 核心扭腰盤
Wonder Core Smart 初階教學光碟預覽
The above videos give you an idea what you can do with a Wonder Core Smart.
[where to get it] [via: Fitness Gizmos]
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