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 often you pass urine depends on how much urine is produced as well as how much urine the bladder will hold. If you drink 1.5 litres a day and your bladder normally holds 400 millilitres (ml), then you will empty your bladder approximately four times that day. A bladder that holds only 100 ml results in passing urine 15 times. If you drink twice as much, you will need to empty your bladder twice as frequently. Normal frequency of voiding is up to seven times a day or not more than every two hours. In young women, the bladder normally holds 400 to 600 ml and is usually emptied when holding 250 to 400 ml. As people age, their bladder capacity tends to decrease, leading to increased frequency of micturition (voiding), especially at night.