A 2004 study also found medical residents with less than four hours of sleep a night made more than twice as many errors as residents who slept for more than seven hours a night, an especially alarming trend given that less than 11% of surveyed residents were sleeping more than seven hours a night.
Best Answer: A normal adult bladder can hold anywhere from 16 to 24 ounces (about 500 to 750 mL) before the urge to urinate becomes overwhelming. Everyone's bladder is different though, so some can hold more than that amount, some less.
Experts tell us, however, that taking care of our kidneys means knowing when they're entering the danger zone. An average bladder has the capacity to hold about 15 ounces of liquid (eight glasses of water, for example, is roughly 64 ounces), and holding in your urine for a long period of time can stretch your bladder. The automatic feedback mechanism in the bladder sends a signal to the brain when it's full, which then urges you to get to the nearest toilet.