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.
1 For most people, the bladder can hold as much as 16 ounces of urine at a time and it gets bigger and smaller depending on how much fluid is in it. 2  When it is time to urinate, the brain sends messages telling the bladder to contract and push the urine through the urethra and out of the body.