KIN427 Lecture Notes - Lecture 4: Potential Energy, Interspinous Ligament, Deadlift
4 Apr 2016
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Ambulance driver carrying woman has a heavy load on his low back because the moment arm is far from his back and the moment on the extensor muscles are not as big (cid:1) (cid:1) The load deformation relationship (stress-strain) (cid:1) (cid:1) (cid:1) (cid:1) Load a ligament slowly, it pulls away from the bone and causes and evulsion. The faster the load there it has a higher breaking strain. Age also changes the mode of failure. Injury is influenced by: load rate, numbers of load, inactivity, age, previous tissue damage (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Tissues are visco-eleastic so with time creep plays a role in injury. Applied load > tissue tolerance: or demand > capacity. Posture can lower the capacity of what someone is going to lift. Therapeutic exercise: this has enormous impact on success (cid:1) A: you cant do both at the same time.
