The Bio-Arc Leg Extension (BA-707) is one of the most popular machines in the Bio-Arc line-up.  With each repetition, the user’s entire body moves along a linear arc trajectory to optimize muscle recruitment.  As a result, the Bio-Arc Leg Extension allows for a full range of motion and greater muscle contraction during full extension (outperforming traditional fixed position equipment).

Additionally, the Bio-Arc Leg Extension maintains hip angle/pelvic tilt to optimize muscle length throughout the entire leg extension motion. Please note: the Bio-Arc Leg Extension comes equipped with a 200 lbs. weight stack; the weight lifted is the approximate combined user’s weight and weight selected (see Weight Guide label).

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TUFFSTUFF BIO-ARC RESEARCH AND DEVELOPMENT 

TuffStuff is proud to introduce the Bio-Arc strength series, the first resistance machines to incorporate multi-planar movement of each machine’s seat, along a linear arc trajectory.  The seat movement allows the user to move along the arc path in conjunction with the machine, helping to maintain more optimal muscle length and improving the force of contraction and training stimulus.

Three years in the making, from concepts and engineering prototypes, to testing and countless refinements.  Each Bio-Arc machine was tested by an independent exercise consulting company.  Pilot research studies combining joint positioning – using goniometry testing, along with muscle recruitment and activity measurements – through electromyographic (EMG) testing.  Each machine was tested to determine the optimal dimensions for final production.  Every detail was measured, and design modifications were executed to exact specifications and re-tested.  The end result is our patented Bio-Arc Technology that allows full body linear arc trajectory motion during exercise. Learn more >

TUFFSTUFF COMMERCIAL STRENGTH

Since 1971 TuffStuff Fitness International has focused on one thing, the design and development of premium strength equipment.

Over the last five decades, TuffStuff has manufactured the highest quality strength equipment and set the industry standards against which all other equipment is measured.  TuffStuff’s craftsmanship is recognized worldwide, and their products are sold across the United States, Canada, Mexico and in more than thirty other countries.

Today TuffStuff is the only fitness company in the United States with a full-service manufacturing facility, capable of producing every product they sell.  Every design and engineering process begins in Chino, California – from concepts to prototypes, testings and design refinements.  As a result, TuffStuff has greater flexibility to customize products, faster turn around times, and maintains a higher level of quality control than competitors.

TuffStuff’s commercial strength equipment is built to exacting standards, with full commercial-grade components including 7 and 11-gauge tubular steel, inert-gas MIG welded construction, and certified USA-made cables.  Whether you are looking to outfit the world’s finest health club, or you just need a single equipment station that will stand the test of time, with TuffStuff you will receive unmatched product quality and exceptional support.