Summary: Effects Of Aging On Muscle Fibre Type And Size
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Read the summary and the most important questions on Effects of Aging on Muscle Fibre Type and Size
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1 Introduction
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Which chronic diseases are usually found alongside sarcopenia?
- Diabetes
- Arthritis
- Cardiovascular diseases
- Osteoporosis
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What makes sarcopenia an important aging disease to tackle?
Sarcopenia is a big reducer of Quality and Quantity of Life. -
2 Muscle function
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2.1 Power
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How is aging related to loss of muscle power (qualitative)?
- loss of short-term muscle performance
- number of falls
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What are the mechanisms by which aging reduces muscle power?
- decrease in muscle mass
- fewer fast-twitch motor units
- decrease in myelinated axons in muscle
- lower shortening velocity in aged
- reduced Ca2+ release upon electrical stimulation
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2.2 Strength
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How does aging quantitatively effect muscle strength?
- reduced 1 RM
- sarcopenia related muscle mass loss
- more antagonist activity
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What has been concluded about the neural drive of aged vs young?
It does not differ statistically. -
What is specific muscle tension?
The amount of force generated is a function of a given unit of contracting muscle tissue. -
Is regular exercise able to stop the loss of muscle mass during aging?
No, it can only slow the process. -
2.3 Muscular Endurance
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How is a reduced fatiguability of old muscles explained?
Reduced neural drive -
3 Sarcopenia
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3.1 Whole muscle and Fiber size
This is a preview. There are 2 more flashcards available for chapter 3.1
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Why does the amount of muscle fibers drop way faster after 50 years of age?
nobody knows yet
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