The Cambridge men's team pass under Hammersmith Bridge during a training session on the River Thames in London, Tuesday March 26, 2024. Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the annual Boat Race between storied English universities Oxford and Cambridge. Now researchers say it comes with a health warning.(John Walton/PA via AP)
The Cambridge Men's team during a training session on the River Thames in Putney, London, Wednesday March 27, 2024. Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the annual Boat Race between storied English universities Oxford and Cambridge. Now researchers say it comes with a health warning. (Zac Goodwin/PA via AP)
FILE - Members of the Oxford University rowing team throw their cox Nicholas Brodie, centre, into the river after beating Cambridge University, at the 154th annual Boat Race on the River Thames, London, Saturday, March 29, 2008. Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the annual Boat Race between storied English universities Oxford and Cambridge. Now researchers say it comes with a health warning. (AP Photo/Lefteris Pitarakis, File)
FILE - The Oxford crew, right, throw their cox Colin Groshong into the Thames at the 155th Boat Race, in London, Sunday March 29, 2009. Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the annual Boat Race between storied English universities Oxford and Cambridge. Now researchers say it comes with a health warning. (AP Photo/Tom Hevezi, File)