English to Spanish Bus/Financial Safety Employee safety instructions

Hello everyone!

I know this is a very common expression, and I have the exact equivalent in Spanish (I believe): "trasero".

However, I'm doubting about using it in an employee safety guide.

Regarding general context, it is just a list of instructions about how to lift loads from the ground:

DON’T USE YOUR BACK
Don’t lift the load with your ***rear end*** high and your head low.
Use your leg muscles, not your weaker low back muscles.
DO TURN WITH LEGS
Do move your legs and feet when turning or lowering the load.


Any suggestions/advice would be more than welcome.

Thank you in advance!