logging in or signing up Muscular system 1 risabush Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 361 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: November 15, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript About : About Contractions, muscle disorders, and the effects of exercise Types of contractions : Types of contractions Isometric contractions- muscle does not shorten & no movement occurs. Ex.- pushing against a wall Isotonic contractions - produces movement at a joint such as walking, running or breathing Twitch contractions- quick jerky contraction Tetanic contractions – contractions which do not relax Atrophy : Atrophy Atrophy is when muscles shrink in mass from lack of use. Why do you think this occurs? It’s not a bad thing… : It’s not a bad thing… Muscular hypertrophy- increase in muscle size MUSCULAR DISORDERS : MUSCULAR DISORDERS Myo – prefix that means “muscle” Myalgia – muscle pain Myopathies – muscle disorders MUSCULAR DISORDERS : MUSCULAR DISORDERS Injury Strain – tearing or stretching fibers, caused by overexertion or trauma A strain near a joint can be a SPRAIN Inflammation – myositis Crush injuries can release muscle contents and cause kidney failure Stress can cause neck and back pain MUSCULAR DISORDERS : MUSCULAR DISORDERS Infections Poliomyelitis was an infection of muscles that caused paralysis and often death. The president Franklin Delano Roosevelt had polio and spent most of his adult life in a wheelchair. “Polio” was common in the early 20th century has nearly been eliminated by a comprehensive vaccination program. MUSCULAR DISORDERS : MUSCULAR DISORDERS Muscular Dystrophy A genetic disease Is actually a group of disorders characterized by muscle atrophy Is often fatal MUSCULAR DISORDERS : MUSCULAR DISORDERS Multiple Sclerosis An autoimmune disease characterized by chronic fatigue and weakness Effects of exercise : Effects of exercise Muscular hypertrophy- increase in muscle size Improved tone and posture More efficient heart and lung function Decreased fatigue Strength training : Strength training Increases the number of microfilaments in each fiber Increases muscle mass Endurance training : Endurance training Increases the muscles’ ability to sustain moderate exercise over a long period Also called “cardio” or “aerobic” exercise Does not usually result in hypertrophy More blood vessels develop to meet the need of the muscles. This increases efficiency of delivery of oxygen and nutrients to muscles. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Muscular system 1 risabush Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 361 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: November 15, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript About : About Contractions, muscle disorders, and the effects of exercise Types of contractions : Types of contractions Isometric contractions- muscle does not shorten & no movement occurs. Ex.- pushing against a wall Isotonic contractions - produces movement at a joint such as walking, running or breathing Twitch contractions- quick jerky contraction Tetanic contractions – contractions which do not relax Atrophy : Atrophy Atrophy is when muscles shrink in mass from lack of use. Why do you think this occurs? It’s not a bad thing… : It’s not a bad thing… Muscular hypertrophy- increase in muscle size MUSCULAR DISORDERS : MUSCULAR DISORDERS Myo – prefix that means “muscle” Myalgia – muscle pain Myopathies – muscle disorders MUSCULAR DISORDERS : MUSCULAR DISORDERS Injury Strain – tearing or stretching fibers, caused by overexertion or trauma A strain near a joint can be a SPRAIN Inflammation – myositis Crush injuries can release muscle contents and cause kidney failure Stress can cause neck and back pain MUSCULAR DISORDERS : MUSCULAR DISORDERS Infections Poliomyelitis was an infection of muscles that caused paralysis and often death. The president Franklin Delano Roosevelt had polio and spent most of his adult life in a wheelchair. “Polio” was common in the early 20th century has nearly been eliminated by a comprehensive vaccination program. MUSCULAR DISORDERS : MUSCULAR DISORDERS Muscular Dystrophy A genetic disease Is actually a group of disorders characterized by muscle atrophy Is often fatal MUSCULAR DISORDERS : MUSCULAR DISORDERS Multiple Sclerosis An autoimmune disease characterized by chronic fatigue and weakness Effects of exercise : Effects of exercise Muscular hypertrophy- increase in muscle size Improved tone and posture More efficient heart and lung function Decreased fatigue Strength training : Strength training Increases the number of microfilaments in each fiber Increases muscle mass Endurance training : Endurance training Increases the muscles’ ability to sustain moderate exercise over a long period Also called “cardio” or “aerobic” exercise Does not usually result in hypertrophy More blood vessels develop to meet the need of the muscles. This increases efficiency of delivery of oxygen and nutrients to muscles.