From The Columbus Dispatch:
Oct. 21 — Two days after a 34-24 win over Iowa:
“When I woke up yesterday, it was unbelievable how sore I was. That was the most sore I’ve been probably this season. Iowa had a good defensive line. They had big, strong, tough guys. We wanted to run the ball, and we did that. The consequences are, you wake up on Sunday morning feeling like you got in a bad car wreck. My hands are beat up. My shoulders and neck are sore from all the impact. My knees were just really sore. It was hard for me to get up and stand after I was sitting down. I couldn’t lift my arms above my head because my shoulders were so sore. I was sore all day yesterday.”
People forget, even on a routine three yard run up the middle with no "Oooooh!" hit on the end of it, the play still ends with at least a 300 lbs. man falling on the ball-carrier. Football is a violent game, this goes without saying, but the players who put their bodies through the grind-house for our entertainment should be commended.
If you're unfamiliar with the type of siege a football season can place on a human body, you'd do well by reading this Dispatch article.