lifting mechanics

Question 1

factors influencing loads on spine

Answer 1

-position of object relative to COM of spine
-the size, shape, weight, and density of object
-degree of flexion or rotation of spine
-rate of loading

Question 2

influence of size of the object

Answer 2

-larger size
-increase in weight
-all equal larger flexion of spine
-hold close to body… otherwise you increase the lever arm

Question 3

influence of upper body position

Answer 3

-anterior tilted pelvis
-posterior tilted pelvis

Question 4

anterior tilted pelvis

Answer 4

-increases lordotic curve
-less compression force
-more shear

Question 5

posterior tilted pelvis

Answer 5

-reduced lordotic curve
-increases compression force
-decrease shear force

Question 6

influence of UB position and weight of object

Answer 6

-Lw= lever arm created by upper body
-anytime increase this distance increase flexor moment on lumbar spine

Question 7

stoop vs squatting

Answer 7

-squat is better if the weight is distributed between the feet

Question 8

reducing compressive and shear forces on spine

Answer 8

-intrabdominal pressure
~a structure that is stifff resists bending more than unpressurized

Question 9

core stabilization

Answer 9

-internal oblique
-transverse abdominus
-thoracodorsal fascia (TLF)
-teach neutral spine position`