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Lecture 3

KIN 427 lecture 3.docx

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KIN 427
Stuart Mc Gill

KIN 427- Lecture 3- January 15, 2013 Regions of the spine -neutral spine vs. flexed spine - bent over--> not trunk flexion --> it is a function of spine flexion (trunk flexion and hip flexion) - paramedic trying to pick up patient--> great force on spine (same as mothers picking up baby), it depends on how the person is moving (not the load) Summary notes: The way the person moves determines risk, resilience, and performance Dealing with tolerance: Tolerance is the load that causes the muscle/ ligament to damage - our job is to design a training load (if you expose to training load that exceeds tolerance--> reinjure, if not high enough--> not enough stimulus Dealing with capacity: Integral/ total we all have a daily capacity ie. patients can say their pain starts around 2pm--> capacity is used up around 2pm therefore we want to think of ways to prolong their capacity Summary Notes: Don't exceed tolerance, optimize capacity ( ie. old man pain in walking tell them to go to bench and do back extension for 1 min and then they may have alleviated the back pain and can continue walking--> optimizing pain free capacity during exercise) Readings--> Chapter 1 and 3 Anatomy Lecture Chapter 4 The vertebrae- 5 lumbar - psis--> go to spine= L5 - hip crest goes through l4 and l5 right in the middle - fatter people (type--> visceral fat, subcutaneous fat (skinny fat more typical for women)) - vertebral body--> force loading structure - pars inticualris--> facet joint--> common site of fracture - who get stress fracture on spine/ pars? gymnasts, baseball players on occasion/ heavy linemen (picking up too much weight in poor posture) - labrum is also a common site--> MVA, when people are thrown to the ground, bass jumping/ parkour - spinous process--> she has so much neural drive to quadratus lumborum that it broke off spinous process - dominant architecture= vertical structure (similar to a beer can when you balance directly on it, it will not crush but the slightest dent/ bend it will crush) this is to counteract compression load - the spine is actually like a spring - will not find a young guy lifting the heaviest weights because it takes time for bone to increase loading capacity (approx. 40 years old) Spine- development: neuralation: occurs on a specific day vertebral end plate - porous end plate - neural arch fracture (would not put stuff like
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