Week 5: Tuesday, Oct 3rd

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Which of the following is true about the decline in muscle mass with aging?

Muscle mass remains constant throughout life.

Muscle mass peaks at 65 years old.

Muscle mass increases after 30 years old.

Muscle mass declines by 3-8% per decade. (correct)

Which term refers to the clinical loss of skeletal muscle mass and strength?

Physical Frailty

Sarcopenia (correct)

Myosteatosis

Dynapenia

What are ADLs?

Advanced Daily Lifestyles

Activities of Daily Living (correct)

Age-Related Decline in Living

Aging-related Decline in Muscle Function

Which of the following is a consequence of age-related skeletal muscle weakness?

Poor balance Signup and view all the answers

What are IADLs?

Instrumental Activities of Daily Living Signup and view all the answers

What are the main factors contributing to age-related decline in muscle function?

Changes in muscle mechanics and neuromuscular function Signup and view all the answers

Which of the following statements is true about the decline in muscle size with age?

Muscle size decreases at a constant rate of 1.5% per year after the age of 50. Signup and view all the answers

Which of the following is a factor contributing to age-related neuromuscular decline?

Atrophy and death of type II muscle fibers. Signup and view all the answers

What is a motor unit?

A group of muscle fibers innervated by a single motor neuron. Signup and view all the answers

What happens to motor units with age?

Motor units decrease in number. Signup and view all the answers

What is the estimated rate of motor neuron death per year from the ages of 30 to 70?

1% Signup and view all the answers

What are some intrinsic factors contributing to the decline in muscle strength and function with age?

Impaired ability to store and release calcium. Signup and view all the answers

Which of the following statements about age-related changes in muscle strength is most accurate?

Muscle strength decreases by approximately 10% per decade starting at 40-50 years old. Signup and view all the answers

Which of the following is true regarding the decrease in isotonic strength with age?

The decrease in isotonic strength is dependent on the velocity of contraction. Signup and view all the answers

What happens to maximum power with age?

Maximum power decreases with age. Signup and view all the answers

What is true regarding the rate of force development and relaxation with age?

The rate of force development and relaxation decreases with age. Signup and view all the answers

Which of the following statements about force steadiness during light-load tasks is most accurate?

Force steadiness decreases with age during light-load tasks. Signup and view all the answers

What happens to fatigability with age?

Fatigability decreases with age. Signup and view all the answers

What is true regarding fatigability for isometric tasks with age?

Fatigability for isometric tasks decreases with age. Signup and view all the answers

Which of the following statements about age-related changes in muscle performance is most accurate?

Age-related changes in muscle performance are highly variable between individuals. Signup and view all the answers

Week 5: Tuesday, Oct 3rd_MC

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Which of the following is true about the decline in muscle mass with aging?