Effective treatment for any orthopaedic condition is an accurate understanding of the etiology of the symptoms. With the structural and biomechanical explanation for pain giving way to the biopsychosocial model, it becomes increasingly evident that a crucial factor for possible pathology and pain, is often simple overload. The concept of the envelope of function was proposed by orthopaedic surgeon Scoot Dye in the year 2005 who used it in order to explain the symptomatic loss of tissue homeostas

Lecture 38(B): The Envelope Theorem for Constrained Optimization