Pushing and Lifting

Question 1

Repetitive pushing, pulling, and lifting is a risk factor for ________.

Answer 1

Low back pain

Question 2

Pulling leads to FLEXION/EXTENSION external torque

Answer 2

Flexion

Question 3

Pushing leads to FLEXION/EXTENSION external torque

Answer 3

Extension

Question 4

Internal moment arm of the rectus abdominis is SHORT/LONG, leading to LOWER/HIGHER compression forces on the spine.

Answer 4

Long; lower

Question 5

Internal moment arm of the erector spinae is SHORT/LONG, leading to LOWER/HIGHER compression forces on the spine.

Answer 5

Short; higher

Question 6

Identify 4 forces acting on the spine during lifting:

Answer 6

Body weight
External load
Erector spinae muscle force
Compression reaction force

Question 7

Identify 4 ways to decrease the erector spinae muscle force during lifting

Answer 7

Decrease velocity of lift
Decrease weight of external load
Decrease length of external moment arm
Increase length of internal moment arm (inc. lumbar lordosis)

Question 8

_______________ contributes to the force used in lifting passive tension.

Answer 8

Posterior ligamentous system

Question 9

Which is more energy efficient? The squat lift or the stoop lift?

Answer 9

The stoop lift

Question 10

Which has a longer external moment arm? The squat lift or the stoop lift?

Answer 10

The stoop lift

Question 11

Valsalva maneuver mechanism

Answer 11

Contraction of the abdominal muscles against a closed glottis.