Ohio State's Michigan Week Tradition Includes Urine (VIDEO)

03/18/2010 05:12 am ET | Updated May 25, 2011

It's an Ohio State tradition for students to jump into the university's Mirror Lake in the week leading up to OSU's matchup against arch-rival Michigan. But it appears that there may be a downside to so many people gathering in one body of water. The Columbus Dispatch reports that a study conducted during last year's jump revealed a dramatic increase in the lake's ammonia -- in this case, urine -- content:

"It went from a background of 5.2 parts per million to a peak of about 42 parts per million," [research associate Steve] Goldsmith said. "So it was an eightfold increase."

Read the Dispatch article for more. Videos of the lake jump below.