back mechanic

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what happens to force arms of muscle during trunk flexion ?

a lot of compression occurs during this flexion which causes alot of shearing. it just depends on how even the weight is.

describe what mechanical change happens to the disc during flexion?

alot of compression occurs during this flexion which causes ALOT of shearing. it just depends on how even the weight is.

why is the athletes sitting on the bench is bad for the back?

because their trunks are flexed for a long period of time and then when they go out to preform it tends to lead to injuries

why is the instruction to lift with the legs not enough information

because you need to tell them to keep your trunk neutral

what happens to rotary force in the back muscles during trunk flexion

everything needs to be neutral (even) to make the disc even to avoid injury

list 3 sources of back pain

facet pain lesion in annulus sacroiliac joint (SI)

slide 23 exercise is always good for the back ?

false

true or false hip flexion with trunk flexion is the best method of lifting

false

true or false the leg press is always a safe exercise for the back ?

false

bending over at hips without a change in knee or trunk motion is always bad lifting technique

false, your trunk can still remain neutral. only when you flex your trunk problems begin to occur

Is flexibility in the trunk high or low in those with back pain ?

high

how long does it take for the disc to return to normal shape after an hour of sitting

i don't think it does ( if anything i think i heard you say 10 min.), try to avoid sitting for long periods of time

what happens to the amount of trunks stabilization during trunk flexion ?

it adds unequal pressure and stress

what happens to back support during trunk flexion

it flexes and moves posterior

which cause more back pain ?low back strength or low muscular endurance

low muscular endurance

what type of job reduces the risk of back pain ?

moderate activity

which reduce back pain injury ?

neutral vertebra

what type of jobs cause disc herniation ?

sedentary and hard labor jobs

how much load and how many repetition typically are needed to cause back pain and injury ?

submax load (low load) with many reps over a long period of time

the bird dog is a safe exercise for the back

true

true or false back muscle improve their ability to produce rotary force during trunk flexion

true

true or false ligaments change position slowly during prolonged trunk flexion

true

true or false ligaments change shape during prolonged sitting

true

true or false muscles can cause back injury and pain

true

true or false muscles cause compression on the vertebra

true

true or false sit ups can cause herniation

true

true or false sitting cause disc herniation

true

can a sneeze or cough cause back injury

yes

can smoking increase the risk of back pain ?

yes

provide good lifting posture

you want a neutral spine with hip flexion. push leg and keep trunk/spine neutral to avoid anterior shift

sleeping tends to cause more back pain in young or elderly ?

young


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