| product description:
1. Seat EVA Material , Wheel PU Material
2. You may choose if the item with Computer or not (We have 2 kinds of Computer you may choose )
You may choose if the item with Balance Ball and Air Pump or not .
3. You may choose if the items packed with Color box or Brown Box !
Total Core starts with a
jerking motion, which causes stain on the neck, shoulders and lower
back. The Total Core eliminates this first jerking motion and then
guides you through a smooth, full range motion that far exceeds the
range of a typical crunch while you are comfortably seated and properly
supported.
The secret behind the Total
Core is the unique, progressive resistance system that "pushes" you
upward with more of a "push" in the beginning of the movement when you
need it most and less toward the end. But there's more! The Total Core
turns the crunch "upside down", because on the way down, your pushing
against the same unique progressive resistance, which works your lower
back muscles and the "back" of the core.
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