Consider the two lifting positions. Position $1$ is a worker bending over to lift a box, while Position $2$ is the same worker lifting with bent knees and straight back.

a$)$ Compare the biomechanical stresses in these two positions:

Which position creates higher compressive forces on the lower back? Why?

How does the moment arm length differ between these positions?

b$)$ From an ergonomics perspective:

What makes Position $2$ more advantageous?

List two specific workplace recommendations you would make to encourage proper lifting technique.

How would fatigue affect a worker's ability to maintain proper form?