What are some of the physical abuse that Winston has experienced?

Winston is strapped onto a torture machine that is designed to stretch backbones until they break.

"He was lying on something that felt like a camp bed, except that it was higher off the ground and that he was fixed down in some way so that he could not move. Light that seemed stronger than usual was falling on his face. O'Brien was standing at his side, looking down at him intently. At the other side of him stood a man in a white coat, holding a hypodermic syringe." (1984)

"The confession was a formality, though the torture was real. How many times he had been beaten, how long the beatings had continued, he could not remember. Always there were five or six men in black uniforms at him simultaneously. Sometimes it was fists, sometimes it was truncheons, sometimes it was steel rods, sometimes it was boots. There were times when he rolled about the floor, as shameless as an animal, writhing his body this way and that in an endless, hopeless effort to dodge the kicks, and simply inviting more and yet more kicks, in his ribs, in his belly, on his elbows, on his shins, in his groin, in his testicles, on the bone at the base of his spine."

"They slapped his face, wrung his ears, pulled his hair, made him stand on one leg, refused him leave to urinate, shone glaring lights in his face until his eyes ran with water; but the aim of this was simply to humiliate him and destroy his power of arguing and reasoning. Their real weapon was the merciless questioning that went on and on, hour after hour, tripping him up, laying traps for him, twisting everything that he said, convicting him at every step of lies and self-contradiction until he began weeping as much from shame as from nervous fatigue."