Couple of things from these experts worth reconsidering. First, the cross itself would weigh over 300 pounds. An ordinary human would have difficulty dragging it through the steep cobblestone streets, let alone someone who was floogged and who was in shock and pain and a state of exhaustion, and dehydration.
Second, His body was pierced from his right as this reconstruction illustrates 
. The spear would not even come close to His heart, which is under the sternum (breastbone and slightly to the right from our perspective).
The contention that he would not bleed after death is true, because there is no pulse to propell the blood, but the blood will seep out by gravity. His death was most likely from high output failure of His heart, and seepage of body fluids into the lungs. Thus a spear would open a gashing would, from which water and blood would pour out of His body by gravity even if he were dead, and would certainly push Him into terminal shock if he were not dead yet.
First, the cross itself would weigh over 300 pounds. An ordinary human would have difficulty dragging it through the steep cobblestone streets, let alone someone who was floogged and who was in shock and pain and a state of exhaustion, and dehydration. You have to believe that Jesus, being God in the flesh, was in perfect health. Since he was a manual laboror for all his life he probably would have been in pretty good shape. And if he were crucified on a cross (and the article states the greek doesn't exclude that it was a pole or a stake) he might have only been bearing the cross piece.