Your waist is not a joint.
Bending is a whole body process that generally involves three sets of joints: the ankles, knees and hips. The waist isn’t one of those joints. The hip joints are also much lower than most people think, about four five inches below the waist. Here is the original Tip 5 with graphics.
A little more on your hip joints.
Finding Your Hip Joints, a perennial favorite.
Article and Video: Three Tips for Bending
link Bending Forward While Sitting
And something for Pointing Your Spine
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