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Published byPriscilla Gilmore Modified over 9 years ago
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Movement Analysis Most (if not all) activities can be analyzed by breaking them down into three general phases: 1) preparation ↔ deceleration ↔ eccentric 2) acceleration ↔ acceleration ↔ concentric 3) follow-through ↔ deceleration ↔ eccentric The more complex an activity is the more phases it tends to have. ex. baseball pitch, walking
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Types of Mechanical Loads on the Human Body
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Composition and Structure of Bone Tissue Composition –minerals (calcium and phosphate) –protein (collagen) Structure - based on porosity –cortical bone (contributes to the stiffness of bone) dense non-porous –trabecular bone (contributes to flexibility) Less dense porous
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Trabecular and Cortical Bone
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Cortical and Trabecular Bone
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Bone Growth Longitudinal growth (epiphyses) Circumferential growth –osteoblasts cells (building) –osteoclasts cells (absorbtion) Wolf’s Law – bone strength increases as the force on bone increases –active lifestyle (bone hypertrophy) –sedentary lifestyle (bone atrophy)
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Load/Deformation (Stress/Strain) Relationship
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