Calcaneal spurs are only detected by a dancing technique.
Calcaneal spur . Calcaneal spurs are typically detected by a radiographic examination ( commonly referred to as an `` x-ray '' ) . Yubu , translated as Pace ( s ) of Yu or Step ( s ) of Yu , is the basic mystic dance step of religious Daoism . This ancient walking or dancing technique typically involves dragging one foot after another , and is explained in reference to the legendary Yu the Great , who became lame on one side of his body from exerting himself while establishing order in the world after the Great Flood .