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NUTR 4210 Study Guide - Final Guide: Intramuscular Fat, Sarcopenia, Skeletal Muscle

3 pages54 viewsFall 2016

Course Code
NUTR 4210
Lindsay Robinson
Study Guide

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Loss of muscle mass & strength
Leads to neuromuscular impairment, loss of mobility, balance problems,
ireased falls & fratures, ioilizatio…
Viscous cycle!
Occurs naturally with aging
Disease is only evident once a threshold is reached
Nutrition & exercise can slow this!
Use imaging techniques to diagnose (could have normal BMI but low muscle
Sarcopenia: skeletal muscle mass 2 or more standard deviations below sex-specific
mean for young healthy adult
Not just loss of muscle mass, but loss of strength too
Muscle mass does not equal muscle function
Decline in strength exceeds what is expected based on decline in mass
Cat deterie futioal apaity ased o hat’s ee lost
Decline in muscle quality (force per unit of cross sectional area)
Decreased fiber size/number
Decreased contractile activity
Fat infiltration
Impaired neurological control on contraction
Decreased quality of muscle with aging
High quality: high oxidative capacity, high glucose transport capacity, high lipid
transport capacity
Sarcopenic obesity
Becoming more prevalent: population is aging and there is an obesity epidemic!
Agai, a’t tell y lookig at a oese perso if they hae SO
Normal age related body changes
Fat mass increases from birth, peaks around 60-75
Differences in where adipose tissue is stored
Visceral fat and intramuscular fat increase throughout lifetime, subcutaneous
does not
Fat in muscle lower muscle strength
Fat & muscle mass
More fat you have, more muscle mass you need (larger mechanical load)
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