KIN 427 Lecture 6- January 24, 2013
Quantified activities from chapter 4:
sitting etc etc.
- look at charts and match exercises to people's tolerance
- extensor exercise→ best is to get belly off the floor so they have control over posture of spine and not
hyper extending (bird dog is 1/2 the load of superman exercise)
speed-mall strolling vs. fast walking
- hitch hike
- swing at shoulders→ fascia→ elasticity is stimulated→ stretch elastic and it springs back to opposite
glut (like german soldiers)
- walking slowly is more stressful on back→ therefore there are benefits of walkign faster
- walking→ role of swinging arms to reduce joint load
Lumar spine posture- should and can it be modified?--> scannell and mcgill→ can physical therapist
change someones' spine mechanics
-posture refers to the lumbar spine position in relaxed standing
- every position has elastic equilibrium→ completely unloaded→ therfore want to find that elastic
equilibrium positions for rehab
- spine neutral zone happens to be in slight standing extension
- hypolordosis= sit more in the greatest elastic stress
- hyper= stand in elastic stretch
-manual therapy approaches can change posture→ physical exercise can help!
- we close glottis → creates hydrolic jack to unload spine→ larger belly can help spine into extension
-but blood pressure sky rockets→ pop vessels etc.
- can't build up intra-abdominal pressure if you don't have muscles there!
- turns out that considered the muscles, it actually increase flexion!
- but it does help with spine stiffness
- intra-abdominal pressure didn't solve but it added to how we understand
- it doesn't help bear more load but it help it become more robust to bear load
there is no magical mechanisms- simply understand biomechanics , functional anatomy, motor control
and physiology (good kinesiology!) section summary:
- when do ligaments become loaded?
- think about how to avoid injury (avoid deviated postures)
- convex side is the tensile side, concave side is the compressed side
- older adults more weak in tensile side and young children are more weak in compressive side (buckling
- failure graph
ligament failure- load rate dependency
- if you load ligament slowly→ avulsion→ the actually bone breaks (liklihood of slow loading breaks
ligament is unl