Staying Healthy During Practice and Competition
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- Losing 2% of your bodyweight through sweating
- A 150-pound person losing 3 pounds of water from sweat = dehydration
- Dehydration also increases body temperature and heart strain
How Much Water Should I Drink Per Day?
- There is NO EVIDENCE to support “8 glasses of water per day”.
- ALSO, drink 25% of your total intake first thing in the morning.
How can I
- Before: 5–7 milliliters per kg of bodyweight 4 hours before exercise/competition
- If you weigh 150 pounds (68 kg), drink up to 476 milliliters (16 oz.)
- During: Drink 30–60 grams of carbohydrate per hour.
- After: Drink 1.5 Liters (6 cups) of water for each kg (2.2 lbs) of body weight lost.
More is not better
- Drinking more water than is recommended will not improve performance and “provides no clear physiologic or performance advantage”.
How much of the different sports beverages should I drink?
- Using the 30-60 grams carbohydrate per hour recommendation, here is how much to drink of the 4 most common sports drinks:
oVitamin Water: 1 small bottle (16-oz) per hour
oSmart Water: There are no carbohydrates in Smartwater, but it does contain electrolytes (sodium and potassium) and is best when exercising < 1 hour.
oCoconut Water: “Mother Nature’s Gatorade” = 1 container (8-oz) per hour
oGatorade: 1 small bottle (16-oz) per hour
1.Nybo, L. and B. Nielsen, Hyperthermia and central fatigue during prolonged exercise in humans. J Appl Physiol, 2001. 91(3): p. 1055-60.
2.Valtin, H., "Drink at least eight glasses of water a day." Really? Is there scientific evidence for "8 x 8"? Am J Physiol Regul Integr Comp Physiol, 2002. 283(5): p. R993-1004.
3.Sawka, M.N., et al., American College of Sports Medicine position stand. Exercise and fluid replacement. Med Sci Sports Exerc, 2007. 39(2): p. 377-90.
S.A., et al., Rehydration with glycerol:
endocrine, cardiovascular, and thermoregulatory responses during exercise in
the heat. J Appl Physiol, 2006. 100(2):
Have A Question About Hydration / Nutrition?
Call (631-352-7654) or email (PitchingDoc@msn.com) Dr. Arnold!