Overload Fitness – Collaborator
Joshua Trentine founded Overload Fitness out of his home in 1999 before opening its first commercial facility in 2005. Much of the work that later circulated through other training environments began as developments inside Overload, where Joshua established the early direction and identity of the company before expanding its reach.
Joshua is also a professional natural bodybuilder. He received his first pro card in 2006 after winning the Natural Mr. USA, and later earned his IFBB pro card in 2017. He went on to represent Team USA at the 2018 Arnold Classic Brazil, the first and only drug-tested team ever to enter that event.
In 2009 Joshua helped launch an equipment manufacturing company and certification program informed by elements of Ken Hutchins’ work. The project, known as RenEx, operated until 2014. During that period RenEx manufactured several novel exercise machines, which included a floating seat leg curl and other proprietary designs. RenEx also hosted multiple conferences that brought together much of the HIT strength training world. They maintained a public website with a membership based community section and published numerous articles that introduced new ideas for HIT, including concepts such as outroading. For several years, RenEx became a central force within the HIT universe.
Whiterock was not insulated from this shift. The momentum surrounding RenEx created a competitive environment that directly influenced Whiterock’s development. In response to the pressure and attention RenEx was drawing, Whiterock undertook extensive design and machining work on MedX equipment, an intense phase of R&D that shaped many of its later engineering standards.
In 2013 Joshua approached Whiterock Exercise with a request for a guided visual static contraction system, followed in 2014 by a request for a guided visual isotonic feedback system. These two projects became the catalysts for what eventually evolved into Set Builder and Rep Builder, marking the start of an active collaboration.
Beginning around 2015, Joshua and Whiterock continued exploring and refining ideas related to guided statics and measured dynamic work. The collaboration developed naturally as the software and hardware advanced.
In 2025, Joshua introduced his own interpretation of static contraction work, a concept he named Free Style Statics, reflecting his personal framing of the Feedback Statics approach originally created by Gus Diamantopoulos.
Today Joshua uses Set Builder 3.0 within his environment, bringing his early involvement full circle and connecting more than a decade of shared experimentation.