This is around the time that the third and final spinal curve, the lumbar curve of the low back, is developing. (candokiddo.com)
If you ever feel disheartened and are unable to find your passion, lie flat on the yoga mat and gently lift your body upwards, resting in a relaxing spinal curve on both hands and feet. (rishikulyogshala.org)
But some people have different curves, side - to - side spinal curves that also twist the spine. (srs.org)