Biomechanics Terminology: Stress, Strain and an Introduction to Tissue Stress In this 16-minute mini-lecture, I discuss how stress and strain are defined, the different types of stress, and why tissue stress is such an important concept for all podiatrists and foot-health professionals to understand. Reviewed are axial, compression, tension, torsional, bending and shear stress, how axial and eccentric loads on long bones can cause tension and compression stresses within their cortical walls and