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Unit Mystery: Do bones and muscles grow back stronger after injury? Or do you lose it when you don’t use it? The painful pros and cons of healing Unit Mystery: • The muscular and skeletal systems work hand in hand, so it should be no surprise that what effects one, effects the other. • But what happens to bone and muscle placed on rest (like in a cast) for a LONG time? Do you really lose it if you don’t use it? Or does it repair stronger than before? • The answer is not so simple: We will explore several unit objectives to answer these question at the END of the unit. Keep an eye out for evidence (and clues) in the following objectives: Do People who do bone stretching heal stronger than before? • You need to know the names of bones and muscles so that you can site them in examples • You need to know the parts of a long bone involved in healing and growth • You need to know the stages of bone repair/healing and types of fractures • You need to know the functions of the skeletal and muscular systems • You need to know Wolfe’s law • You need to know about causes of atrophy in muscle and how muscles are built Evidence/Clue 1- Bone Stretching • Bone stretching video https://www.youtube.co m/watch?v=nrPKaTDkQv E Clue 1:Parts of a long bone • • TISSUES: Spongy bonecompresses, light – Stores Calcium • Compact bone=strong, exterior. Clue 2: Bone growth •From cartilage to bone= ossification •Ends for teens at the epiphyses •Bones remodel constantly as adults but don’t change length Clue 3:Bone repair Clue 4: Wolfe’s law • https://www.youtube.c om/watch?v=yENNqRJ2 mu0 • Long bones are thickest where they are most likely to break. • This remodeling also occurs due to changes in muscle building or loss. Clue 5: Fascia • Muscles are wrapped in multiple layers of fascia or connective tissue • Helps bundle muscle cells and muscle groups together • Provides strength and stability • Is constantly added to and torn down each day • Some fascia tears or melts as we move & gets rebuilt when we don’t • If injured, sometimes the body adds more fascia • This is compounded because we immobilize injured parts Clue 5: Atrophy and contracture • Atrophy: Poor muscle development as a result of disease or lack of use, muscle wasting. • Contracture: Abnormal shortening of muscle fibers, tendons, or fascia making it difficult to stretch a muscle. (typical of bed rest) • Adhesion: Scar tissue (from Sx or injury) forming in fascia surrounding muscle, making it difficult to stretch. • Hypertophy: Increase muscle bulk as a result of use (work out). Myofascial Release • Heat and pressure devises used to part some of the fascia & increase mobility • Requires repeat treatments • Rollers, combs, massage Can you solve the mystery? • Use information from EACH clue to: – Describe the bone stretching procedure (steps and goals) – Discuss the potential recovery outcomes (will they have bones that heal stronger, why or why not)? – Would their muscle be effected? IF so how? – When an athlete breaks a bone or tears a muscle, will it come back stronger? Why/why not?