KINE 1020 Lecture Notes - Lecture 1: Neutral Spine, Spinal Disc Herniation, Poor Posture
6 Mar 2016
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Document Summary
Physical fitness if composed of heredity, environment, lifestyle, anthropometry, musculoskeletal, and cardiovascular-respiratory. Balance: dependant upon signals that are present in ears, kinesthetic sensors, vision, and, inner ear (vestibule, cochlea, semicircular canals) helps with balance. co-ordination. Semicircular canals (at 90*) are lined with tiny hairs and fluid and they detect angular motion. Movement of fluid alerts brain direction of body: kinesthetic sensors allow for brain to be aware of where body is positioned and where objects around body are positioned. Golgi tendon organs (in tendon) sense when there is stretch applied to tendon, in response there is a relaxation. Muscle spindles (in muscle fibres) detect length, tension, and load. Joint kinesthetic receptors (joint) respond to mechanical deformation occurring in joint. Happen when reaching extreme of joint range: balance deteriorates with aging. Important to do resistance training to prevent loss of balance.
