KINE 1020 Lecture Notes - Lecture 35: Programmed Cell Death, Caspase, Sarcopenia
5 Sep 2016
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Early life: growth and development to maximize peak. Older life: rehabilitation and ensuring quality of life. Muscle mass growth patterns/curves girls/boys, puberty factors contributing to muscle size/growth. Muscle trainability the older you get > fat mass and skeletal muscle mass: girls have same general pattern and then puberty, males it takes longer before plateauing. Hypertrophy = increasing cell size main contributor to increasing muscle mass. Cell/fiber diameter: increase then plateau, increase then plateau, etc. Muscle cell types: at birth 40% type 1, 45% type 11 (35%iix-fg and 10%! !a-fog); 15% undifferentiated (type iic: 1 little difference in the proportions of children and adults, transition in early postnatal life with ~10% of type iic fibres mobbing to the. Type: only ~5% type iic remains in adult, slight increase in type i and ii increase during postnatal growth. No sex differences; some small inter-muscle difference i. e. diaphragm little less.
