Just a standard recommendation. I suffer from chronic back pain due to using improper lifting techniques early on in life.
It’s very simple to get get into a routine to prevent future issues. Just bend your knees. Lift with your legs and not your back.
That’s all. Take care.
Edit: See also this snippet from OKstate.edu regarding the pressure applied to your back when using improper lifting techniques:
The amount of force placed on your back under certain conditions can be surprising. Anytime you bend or lean over to pick something up without bending your knees, you put tremendous pressure on your lower back.
Think of your back as a lever. With the fulcrum in the center of the lever, it only takes ten pounds of pressure to lift a ten pound object.
However, if you shift the fulcrum to one side, it takes much more force to lift the same object. Your waist actually acts like the fulcrum in a lever system, and it is not centered. In fact, it operates on a 10:1 ratio. Lifting a ten pound object actually puts 100 pounds of pressure on your lower back.
When you add in the 105 pounds of the average human upper torso, you see that lifting a ten pound object actually puts 1,150 pounds of pressure on the lower back.
Given these figures, it is easy to see how repetitive lifting and bending can quickly cause back problems. Even leaning forward while sitting at a desk or table can eventually lead to back-related problems