 Frost moved to Pueblo, Colorado in 1973 — drawn by the mountains, climate, and lifestyle — bringing with him his international reputation as a dogged researcher, talented orthopaedist and prolific author.While there he continued his active participation at the Sun Valley Workshops where he interacted with participants to develop cancellous bone histomorphomety (1977), generate and refine the mechanostat hypothesis (1987), and the ever-evolving Utah Paradigm of Bone Physiology (1997).Dr.