PHTY103 Lecture Notes - Lecture 7: Bone Density, Bone Resorption, Tai Chi
Document Summary
Resorption of periosteal and sub periosteal bone. 3-fold reduction of load to failure: cartilage: Lower uronic acid levels may be long lasting (even once remobilized: tendons and ligaments, decrease in strength (ultimate failure, decreased stiffness (slope of line, reconstruction: Gradual rehabilitation post surgery allows for the return of mechanical properties. Changes in mechanical properties persist for up to 2 years: muscle: Loss of endurance and strength: decreased number and size of fibers, primarily type 1 fibres that atrophy. Functional role may effect the magnitude of atrophy. Affect of inactivity on oa patients: strengthening exercises build muscle strength. Exercises to strengthen leg muscles are a reasonable first step, even before using pain relievers. Health care professionals fear that patients who rely on painkilling drugs may overuse knees, which do not have strong enough muscle tissue to protect the joints from further damage.
