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.
How Long Is It Okay to Hold It? Your body's physical capacity to keep in urine is based on a few things: Most of the time women can hold urine for three to six hours, but this will vary, says Brucker. It really depends on the amount of urine that someone makes, which is determined by hydration status and fluid intake, and also functional bladder capacity, which is a combination of the actual size of the bladder and bladder sensitivity.