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.
A healthy adult bladder can hold between 350 milliliters (ml) and 550 ml of urine, which is about one and half to two cups. Most people feel the need A healthy adult bladder can hold between 350 milliliters (ml) and 550 ml of urine, which is about one and half to two cups.