Bad for the tummy

TOO MUCH exercise can cause severe stomach problems, a study shows. Australian researchers found that those who exercise vigorously for more than two hours put themselves at risk of gut damage. The authors, from Monash University, reviewed several studies looking at the effects of excessive exercise, including cycling and running.

They found that after a ‘threshold’ of two hours the intestine gets injured and the gut becomes leaky, allowing harmful bacteria to pass into the bloodstream.