Have you checked the meaning of "bend over" in a dictionary? It is a figure of speech.
I feel [STRIKE]good [/STRIKE] better now than before. Now I can pick things up by bending over.
Can I ask a doctor "Can I pick up something [STRIKE]weighty[/STRIKE] heavy by bending over"?
According the second sentence of post #1, you have already established that you are able to bend over and pick up heavy things. Isn't a bit late to ask your doctor if you can do it?
Yes, it can be a figure of speech. However this is not the context that would mean anything but bending at the waist to touch the floor or as in this case bending at the waist to pick up a heavy object.
When you want to give your reader the image of someone with their back straight but leaning over from the waist, you can use that phrase. The young woman was bent over at the waist, her arms clasped around her calves and her hair hanging down to the ground, looking at the camera."Bending at the waist" can also be used in place of "Bend over". Am I correct?