Body Mechanics Flashcards
common ergonomic causes x5
poor body mechanics
poor flexibility
weakness
repetitive microtrauma
stressful living or work habits
proper body mechanics x4
conserves energy
reduces stress on body
promote body control
reduce risk of personal injury
sandwhich effect: what 2 mm creates spinal stability
transverse abdominis
lumbar multifidus
Gx = prevent hyperextension or hyperflexion
BOS
base of support AD-like canes and walkers help increase BOS
COG
the heaviest area of mass of an object
ant S2 is human COG
- before lifting an object, the object COG should be brought closer to the lifter COG, so squat or kneel down
VGL
vertical gravity line divides the body into the sagittal plane beginning at the head and traveling through COG
- for optimal stability & balance, VGL must be in the middle about BOS
what happened when you Valsalva? x4
increased intrathoracic pressure
venous circulation to R heart decreases
CO decreases
blood pressure increases
valsalva maneuvers (lungs)
elevated BP leads to vessel rupture in brain (CVA)
- hemorrhagic stroke d/t brain bleed of ruptured vessel
why is lordosis important?
it directs the intervertebral discs anteriorly (reduces risk of posterolateral disc rupture)
LS stability is increased as vertebral facets are approximated
hip/thigh mm are positioned optimally to do the work (legs)
hips below knees to pick up low/awkward shaped object; straddle objects w elbows extended
deep squat
heavy/awkward object that don’t require to bend as deep; half squat
power lift
knees slightly flexed, straddle object
straight leg lift
light object; shift onto 1 leg while other leg lifts into air (NWB)
one-leg Golfers lift
kneeling on 1 knee; opposite leg @ 90 deg hip & knee flexion
half-kneeling
low squat q wide BOS
traditional
