According to a new study, running a marathon is very likely to do damage to your kidneys.
Even with proper hydration, researchers found that about 40% of runners suffer big time kidney injuries after marathons.
It seems running 26.2 miles messes with your kidneys just as much as going through heart surgery or spending time in the intensive care unit.
So if you needed a reason to avoid running a marathon – other than the pain and boredom – remember your kidneys. (The Atlantic)