Did you know that the average person has 2.6 million sweat glands? If you’ve been out on the road running or biking, you’ve probably been using ALL of them. The old school of thought used to be “drink, drink, drink,” meaning you can’t put enough water in your system during exercise! The new school of thought is, “drink with electrolytes” because too much water without them can cause a condition called Hyponatremia. Hyponatremia, also known as low sodium concentration or water intoxication, occurs due to prolonged sweating coupled with the dilution of extracellular sodium caused by consuming large amounts of fluid with low or no sodium. Drinking fluids with electrolytes like HEED help keep your body’s balance during exercise sessions.
So during those long endurance sessions how much are you really sweating? An average person sweats between 0.8 to 1.4 liters (roughly 27.4 to 47.3 oz.) per hour during exercise, the size of the larger bike water bottles. Compare to Alberto Salazar’s recorded highest ever sweat rate (125 oz per HOUR) during his training for the Olympics in 1984!
To determine how much YOU sweat, weigh yourself prior to one hour of exercise, and then weigh yourself afterwards. If you didn’t drink anything or use the bathroom then the difference is your sweat rate-for each pound lost you lost 15.4 ounces of fluid. If you did consume fluids-ADD in the fluids consumed, then SUBTRACT out an estimate of a trip to the bathroom. Don’t forget to record the temperature and humidity AND record for swimming, biking and running because sweat rates for each sport vary.
Do you know your sweat rate? Coming up we’ll tell you why it’s a good thing to know!
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