“It appears likely that the mechanism of death in crucifixion was suffocation. The chain of events which ultimately led to suffocation is as follows: With the weight of the body being supported by the sedulum [wooden block], the arms were pulled upward. This caused the intercostals and pectoral muscles to be stretched. Furthermore, movement of these muscles was opposed by the weight of the body. With the muscles of respiration thus stretched, the respiratory bellows became relatively fixed. As dyspnea developed and pain in the wrists and arms increased, the victim was forced to raise the body off the sedulum, thereby transferring the weight of the body to the feet. Respirations became easier, but with the weight of the body being exerted on the feet, pain in the feet and legs mounted. When the pain became unbearable, the victim again slumped down on the sedulum with the weight of the body pulling on the wrists and again stretching the intercostal muscles. Thus, the victim alternated between lifting his body off the sedulum in order to breathe and slumping down on the sedulum to relieve pain in the feet. Eventually, he became exhausted or lapsed into unconsciousness so that he could no longer lift his body off the sedulum. In this position, with the respiratory muscles essentially paralyzed, the victim suffocated and died – (DePasquale and Burch).”
