A Systems Approach (Skeletal, Immune & Energy Systems)

A Systems Approach (Skeletal, Immune & Energy Systems)...

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Unformatted text preview: 1 Copyright 2011 American Col ege of Sports Medicine Skeletal System Skeletal System Copyright 2011 American Col ege of Sports Medicine Skeletal System Skeletal System Primary functions: Structural framework of the body Protects underlying organs and tissues Provides a lever system for movement Serves as a storage area for minerals Aids in the formation of red blood cells Osteoporosis is a serious disease condition Bone-Muscle Lever Wilmore & Costill. The Musculoskeletal System. In: Training for Sport and Activity, 3 rd edition, 1988 2 What contributes to stiffness and compressive strength in bone? calcium carbonate calcium phosphate collagen water other minerals 60-70% dry bone weight Bone Composition & Structure osteoblasts build new bone tissue osteoclasts resorb bone tissue osteocyte is a mature bone cell Bone Growth & Development 3 What kinds of activity tend to promote bone density? weight bearing exercise, since the larger the forces the skeletal system sustains, the greater the osteoblast response What tends to diminish bone density? lack of weight bearing exercise bed rest traveling in space Athletes have 25% greater BMD than active people, and 30% greater BMD compare to inactive people Bone Response to Stress Copyright 2011 American Col ege of Sports Medicine Skeletal System Skeletal System The differences in bone mineral density between normal bone (top panel) and osteoporotic bone (bottom panel). Who is affected by osteoporosis?...
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A Systems Approach (Skeletal, Immune & Energy Systems)...

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