MEDI110 Lecture Notes - Lecture 13: Bone Density, Synovial Fluid, Osteopenia
30 Oct 2018
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Document Summary
65 years is the fastest age group in australia. During early months and years, they are foundational through synapse formation. Young who use a lot of weight bearing activities before the ge of ~10 have less chance of having problems such as osteoporosis is less likely to occur. 40"s who are trained with a higher peak, once coming to ~80 years have a higher muscle mass. Ageing is systemic, and affects all systems of the body, biological ageing ~25%, 75% other factors. Senescence: aging related deteriorations that affect physical and mental form and function. Decrease in muscle mass 10-15% loss per decade, from peak of 30 years. Reduction in size number of muscle fibres. Sarcopenia, loss of muscle with disuse and disease. Eccentric, isometric and concentric all drop off with age, and eccentric is the least lost. Factors affecting loss of strength with age. Lifetime loading ( physical activity especially in first 15 years, and menopause).
