Brand Name: DFT
DFT-1695
Type: Large Loader
Size: 1086mm*1057mm*1310mm, 1086*1057*1310mm
Material: Metal, Steel Q235
Application: Universal
Product Name: Abdominal crunch + back extension
Color: Optional
Weight: 118kg
Weight stack: 100kg
Abdominal crunch machines isolate the abs, which sounds good in theory, but in everyday activities the abdominal muscles never work in isolation," says Peter Jenkins, C.P.T., director of personal training at Blink Fitness. "By nature, our abs contract as way to protect our spine, using the hip flexors to do so.
Back extension exercises (sometimes also called hyperextensions) can strengthen lower back muscles. This includes the erector spinae, which supports the lower spine. Back extensions also work the muscles in your butt, hips, and shoulders.