When lifting something heavy, you should test the [blank_start]weight[blank_end] to see if you can carry it yourself. Ask for [blank_start]help[blank_end] if you are unable to lift on your own.
Then hinge at your [blank_start]hips[blank_end] and bend at your [blank_start]knees[blank_end], doing most of the work with your legs, keeping your feet wide apart and your [blank_start]stomach[blank_end] muscles tense.