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产品描述：
The 2ST™ The 2ST?
Low Back utilizes four-bar linkage technology to effectively isolate and provide direct work for the lumbar spine.
Product Info
- Large, flat back pad spread forces out over larger area and pivots for user comfort
- Complex joint movements are duplicated through the use of a four-bar linkage mechanism, providing greater motion control and a decrease in joint pressure
- Adjustable foot platform to position knees above hip joint thus eliminating pelvic thrust and maintaining axis alignment
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