22 Questions
What is the rate of age-related loss of skeletal muscle mass?
0.5 to 1% per year
In disuse and illness, what can be said about the loss of skeletal muscle mass and function?
It accelerates dramatically
What is the likely factor influencing muscle fiber atrophy during disuse according to the text?
Model of disuse and muscle group
What is a key aspect of neural sites for loading-induced increases in strength according to the text?
Type-specificity of training
What is a key factor contributing to the rapid increase in muscle strength?
Agonist activation
What is the most common observation related to increased EMG during isometric knee extensor training?
Increased agonist EMG
How does decreased antagonist activation affect force expression of the agonist muscle?
Limits force expression
Where do the adaptations related to muscle strength increase primarily occur?
Specific to task-specific training
What type of loading shows significant improvements in isotonic weight training?
Isotonic loading
Which factor is necessary for joint stabilization even though it limits force expression of the agonist muscle?
Increased antagonist activation
Which muscle fibers are most affected by disuse in terms of atrophy?
Both type I and II fibers
In disuse, what happens to twitch force in muscles?
It decreases
During disuse, which type of muscle fibers show atrophy?
Both type I and II fibers
What is the impact of disuse on voluntary force in muscles?
It decreases
In the context of muscle growth, what actually 'grows' in response to loading?
Myofibrils
What is the typical timeline for the late phase of adaptations to strength training?
Months to years
What is the primary factor that leads to muscle growth?
Muscle protein synthesis surpassing breakdown
In muscle growth, what leads to net accretion of contractile tissue?
High-load resistance training
What type of hypertrophy is suggested to occur with low-load resistance training?
Fiber-specific hypertrophy
What is a key factor in muscle growth in adults due to loading?
Increase in myofibril size
What is the impact of training specificity on strength improvement?
Short-term strength gains are task-specific
Which factor is crucial for muscle growth as outlined in the text?
'Heavy' resistance exercise combined with protein intake
Test your knowledge on the factors that influence muscle growth, including muscle protein synthesis, myofibril size and number, and the impact of exercise and protein consumption. Explore concepts like net accretion of contractile tissue and fibre-type specific hypertrophy.
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