by bubudi » Wed Oct 15, 2008 10:39 am
up to 80% of athletes get cola coloured urine, caused by intense exertion. running and jumping is an extremely common cause as is boxing, cycling and drumming. some of my drumming teachers have talked affectionately about it. it's known as stress haematuria and is so common in drummers that medicos have given it the nickname "bongo drum hematuria" (seriously, look it up in google). decreased blood flow to the kidneys as well as trauma to the pelvic area (including bladder and kidneys) from the movement of exertion are considered to be the cause. temporary pain to the back, abdomen or thighs is a common response.
some foods and medications (e.g. beetroot, berries, food colouring, chloroquine, laxatives, dilantin) can cause cola-coloured urine, as can intensely concentrated urine (from dehydration).
another similar condition is ketonuria. during intense exercise or fasting the body uses up the glycogen reserves. without any glucose, it resorts to breaking down fats and proteins to get energy and the broken down products, called ketones, pass through the kidneys. in a person who frequently gets ketonuria, especially when exercise is not the cause, it is indicative of diabetes. make sure you eat well 2 hours before and soon after a heavy drumming session. there is also haemoglobinuria (presence of the oxygen carrying, pigment-containing protein from red blood cells in the urine, which also can be due to intense exercise) and myoglobinuria (presence of a type of pigment-containing protein the urine, usually from trauma) which also cause this kind of discoloured urine.
stress hematuria disippates quite a bit within 12 hours, totally disappearing within about 72 hours. so if you get it once in a while i wouldn't worry too much about it. just consider what likely caused it (food, fasting, medication, stress, exercise, etc) and how long the urine has been discoloured. if it doesn't dissipate or persists, you should get it checked immediately. i agree with what was said about adequate hydration. diluted fruit juice is best (nothing too heavy or pulpy) and supplies some much needed glucose and fructose to the body during high exertion. water is always good. dairy or any food is never a good idea at the time of exercise. don't drink 2-3 litres all at once or drink 10 litres in one day as this will also overload your vital organs and cause an electrolyte imbalance. don't worry too much about the effect of acidic drinks like orange juice. although they are bad for the teeth, if anything, they have been shown to reduce the incidence of kidney stones.