Justin Taylor shares this article which goes into incredible detail, from a medical perspective, on what the body goes through during crucifixtion.
"The suffering of the utterly innocent and infinitely holy Son of God in the place of utterly undeserving sinners to bring us to everlasting joy is the greatest display of the glory of God’s grace that ever was, or ever could be.
In conceiving a universe in which to display the glory of his grace, God did not choose plan b. This was the moment—Good Friday—for which everything in the universe was planned. There could be no greater display of the glory of the grace of God than what happened at Calvary. Everything leading to it and everything flowing from it is explained by it, including all the suffering in the world." - John Piper
"Now, mark: when you see Christ going up the Mount of Doom, you see man going there: when you see Christ hurled upon his back, upon the wooden cross, you see the whole company of his elect there; and when you see the nails driven through his blessed hands and feet, it is the whole body of his Church who there, in their substitute, are nailed to the tree. And now the soldiers lift the cross, and dash it into the socket prepared for it. His bones are every one of them dislocated, and his body is thus torn with agonies which can not be described. 'Tis manhood suffering there; 'tis the Church suffering there, in the substitute. And when Christ dies, you are to look upon the death of Christ, not as his own dying merely, but as the dying of all those for whom he stood as the scape-goat and the substitute. It is true, Christ died really himself; it is equally true that he did not die for himself, but died as the substitute, in the room, place, and stead of all believers." - Charles Spurgeon