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Maximizing Muscle Contraction Efficiency Through Exercise

Learn about muscle contraction processes in skeletal muscle, the impact of fatigue and oxygen debt, muscle tone, cramping, and effects of aerobic and resistance exercises. Discover the benefits and results of different exercise types on muscle health and efficiency.

michaelcjohnson
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Maximizing Muscle Contraction Efficiency Through Exercise

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  1. Muscle Contraction This simple process occurs in just a few thousandths of a second!!! • Summary New Summary:McGraw Hill • Video Showing AChE PROJECT TIME!!! • Student Example • Beth Dietzen: Prezi • Sam B photostory • Prezi • Youtube rap (in email a & p - bryce)

  2. Contraction of a Skeletal Muscle • “all or none” • Different combinations • Force • Need for ATP

  3. 3 pathways to get ATP (diagram p 190) • Bonds of ATP • 4-6 seconds 1. Direct phosphorylation of ADP to ATP - Creatine phosphate (CP) - converts ADP to ATP directly • Aerobic respiration occurs in mitochondria 3. Anaerobic respiration fast but not as efficient as aerobic

  4. Muscle Fatigue and Oxygen Debt “Why do you get tired when you workout?” • Muscle fatigue: (Video: Ironman) • Used Oxygen must be “repaid”

  5. Muscle Tone and Exercise • Muscle Tone • Muscle strains/tears • Microtears = sore

  6. What is a muscle cramp? Causes?

  7. DONE

  8. Aerobic ExerciseEffects of Exercise on Muscle • Fast twitch (more CP) and slow twitch fibers (more mitochondria) • Small increase in muscle cell size • Store more oxygen • More Increase flexibility, mitochondria, coordination • Resist fatigue

  9. Resistance ExerciseEffects of exercise on muscle • Isometric • Increase connective tissue • Increase muscle cell size (myosin) and strength • More contractile filaments

  10. Both types together are BEST • Results of increased muscle use: • Increase in muscle strength and efficiency • Muscle becomes more fatigue resistant • Healthy heart (enlarges) • improves digestion • bones stronger • lungs more efficient • clear fat deposits from walls of blood vessels

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