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).
You may also want to see:
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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