Vanessa R.
Doctor of Physical Therapy
“Feels like free-weight resistance—with less stress on the joints.”
Robert Bilkovski, M.D.
“Incorporating a resistance training routine is integral in maintaining muscle strength, bone density and fitness level as we age. A NASA funded study showed SpiraFlex technology produced similar benefits to free-weights. The DoubleFlex integrates SpiraFlex resistance in a portable device that can deliver multi-planar functional training benefits.”
Kathy Blecha
Traveling Professional & Mother of Two
“The DoubleFlex is my portable gym, allowing me to workout at my hotel or airport during flight delays. As an onthe-go mother, I can take it in my bag for workouts during my kids’ tournaments. The DoubleFlex is always with me, keeping my body in balance while I juggle the stress of work, parenting and family sports.”




