Week 5: Tuesday, Oct 3rd_Short answer

Sarcopenia is the clinical loss of skeletal muscle mass and strength.

ADLs are activities of daily living, which are basic self-care tasks. IADLs are instrumental activities of daily living, which are the things you do daily to take care of yourself and your home.

The two main factors that contribute to age-related decline in muscle function are changes in muscle mechanics (the muscle-tendon unit) and changes in neuromuscular function (individual motor neurons and motor units).

<p>3-8%</p> Signup and view all the answers

<p>1%</p> Signup and view all the answers

<p>up to 35%</p> Signup and view all the answers

<p>decreased mitochondrial function, decreased ATPase activity of myosin, impaired ability to store and release Ca, decreased velocity of contraction, decreased rate of force development, decreased peak force and power, increased fatigability</p> Signup and view all the answers

<p>Decreased muscle strength, decreased max isometric strength (~10% per decade starting at 40-50YO down to ~40% of max by 80 YO), decreased maximum power, decreased rate of force development and relaxation, reduced force steadiness, variable changes in fatigability.</p> Signup and view all the answers

<p>Lower limb muscles compared to upper limb muscles.</p> Signup and view all the answers

<p>Intrinsic factors, such as decreased muscle mass and motor unit number, and extrinsic factors, such as sedentary lifestyle and chronic diseases.</p> Signup and view all the answers

<p>10%</p> Signup and view all the answers

<p>40%</p> Signup and view all the answers

<p>Lower limb muscles</p> Signup and view all the answers