These are the symptoms of sleep deprivation, and sleep experts expect them to accumulate over the next two weeks as sports fans and Olympics tragics risk red eye, and worse, to catch the action live from London.

 

The irony: that watching humans in peak condition perform at the pinnacle of physical achievement can harm your health. ''The Olympics is likely to establish a very unhealthy habit of life [among viewers] while it lasts,'' says Tim Olds, a professor of health science at the University of South Australia.