Why Use Sports Drinks


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Why would a person use sports drinks over water? This presentation compares water and Gatorade to examine the benefits of sports drinks.

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  • Why Use Sports Drinks

    1. 2. Water vs. Sports Drinks M. Schwartz WSSD 618
    2. 3. DID YOU KNOW… Although the marketing push has increased significantly in the past 5-10 years, the concept of the “sports drink” has been around for a long time. <ul><li>Athletes have been formulating their own sports drinks for decades. </li></ul><ul><li>Gatorade was developed in 1965 at The University of Florida. </li></ul>
    3. 4. Objectives <ul><li>Why do we get thirsty? </li></ul><ul><li>What is the difference between water and a sports drink? </li></ul><ul><li>What are the fluid guidelines for athletes? </li></ul><ul><li>What drinks should athletes avoid? </li></ul>
    4. 5. What causes thirst? <ul><li>Exercise causes an increase in body temperature </li></ul><ul><li>Sweating is an attempt to cool the body </li></ul><ul><li>A loss of body fluid causes a degree of dehydration </li></ul><ul><li>The brain triggers the thirst response… </li></ul><ul><li>… WE DRINK to replace the lost fluids </li></ul>
    5. 6. SO WHAT?! <ul><li>Continued fluid loss will eventually cause dehydration </li></ul>
    6. 7. Effects of Dehydration <ul><li>Sweating causes a loss of water AND electrolytes </li></ul><ul><li>An athlete will begin to notice decreased performance levels with a sweat loss of just 2% of body weight. </li></ul><ul><ul><li>Ex: 150 pound athlete = 3 pounds </li></ul></ul>
    7. 8. Water <ul><li>Advantage </li></ul><ul><ul><li>It will quench your thirst </li></ul></ul><ul><li>Disadvantage </li></ul><ul><ul><li>It will not rehydrate the body </li></ul></ul>HUH?!?!
    8. 9. Water (continued) <ul><li>“ Turns off” the thirst mechanism prematurely </li></ul><ul><ul><li>Person drinks less water than the body needs </li></ul></ul><ul><li>“ Turns on” the kidneys </li></ul><ul><ul><li>More urine is produced </li></ul></ul>
    9. 10. The Million-Dollar Question Why should athletes use sports drinks?
    10. 11. They contain WATER <ul><li>The body is between 50% and 70% water. </li></ul><ul><li>WE NEED IT TO SURVIVE! </li></ul>
    11. 12. They have FLAVOR <ul><li>Studies have shown that “children and young adults will consume more fluid if they are offered a flavored drink.” </li></ul>Dr. Michael E. Speer, MD; Chairman, Council on Scientific Affairs
    12. 13. They contain ELECTROLYTES <ul><li>Restores sodium, potassium and chloride to the body </li></ul><ul><ul><li>needed to maintain water balance outside the cell </li></ul></ul><ul><ul><li>lost through sweat </li></ul></ul>www.ggsiweb.com
    13. 14. They contain SODIUM <ul><li>The small amount of sodium contained in many sports drink helps activate thirst, ensuring you drink until fully rehydrated. </li></ul>www.ggsiweb.com
    14. 15. They contain CARBOHYDRATES <ul><li>Provides additional energy to working muscles during exercise </li></ul><ul><ul><li>A 6% carbohydrate content is best  absorbed as fast as water </li></ul></ul>www.ggsiweb.com
    15. 16. Water vs. Sports Drinks Flavored = more drinking No flavor = less drinking Absorbed quickly = less urine Stimulates urine production Sodium added = greater thirst = more drinking Quenches thirst = less drinking Added electrolytes No electrolytes 6-8% carbohydrates = provides added energy No carbohydrates
    16. 17. “ There are many occasions when Gatorade is more effective than water, but no occasion when water is more effective than Gatorade.” Dean Kleinschmidt Head ATC, New Orleans Saints THE VERDICT?
    17. 18. This is particularly true for… <ul><li>Long periods of exercise </li></ul><ul><ul><li>Ex. running a marathon, 2-a-day practices </li></ul></ul><ul><li>Shorter bouts (30+ minutes) of vigorous activity </li></ul><ul><ul><li>Ex. tennis, soccer, basketball </li></ul></ul>
    18. 19. Fluid Guidelines for Athletes <ul><li>Before exercising… </li></ul><ul><li>Drink 17-20 ounces of water or sports drink 2-3 hours before exercising </li></ul><ul><li>Drink 7-10 ounces 20 minutes before exercising </li></ul>Prentice & Arnheim (based on recommendations from ACSM and NATA)
    19. 20. Fluid Guidelines for Athletes <ul><li>During exercise… </li></ul><ul><li>Fluid replacement beverages should be readily accessible </li></ul><ul><li>Consume at least 7-10 ounces every 10-20 minutes </li></ul>Prentice & Arnheim (based on recommendations from ACSM and NATA)
    20. 21. Fluid Guidelines for Athletes <ul><li>During exercise… </li></ul><ul><li>Consume the maximum amount of fluid you can tolerate </li></ul><ul><li>A cool (50-59°), flavored beverage is recommended </li></ul>Prentice & Arnheim (based on recommendations from ACSM and NATA)
    21. 22. Fluid Guidelines for Athletes <ul><li>After exercise… </li></ul><ul><li>For each pound lost during exercise, consume 20 ounces of fluid </li></ul><ul><ul><li>Compensates for additional sweating and urination </li></ul></ul><ul><ul><li>Replaces carbohydrate stores </li></ul></ul>
    22. 23. Fluid Guidelines for Athletes <ul><li>What to avoid: </li></ul><ul><li>Fruit juices </li></ul><ul><ul><li>Fructose slows absorption </li></ul></ul><ul><li>Carbonated Drinks/Soda </li></ul><ul><ul><li>Carbonation causes bloating </li></ul></ul><ul><ul><li>High sugar concentration slows absorption </li></ul></ul>
    23. 24. Fluid Guidelines for Athletes <ul><li>What to avoid: </li></ul><ul><li>Caffeine (cola, tea, coffee, etc) </li></ul><ul><ul><li>A diuretic, promoting dehydration </li></ul></ul><ul><li>Energy drinks </li></ul><ul><ul><li>More than 8% carb content </li></ul></ul><ul><ul><li>May contain Ephedra (Ma Huang) </li></ul></ul>
    24. 25. The “Not-So-Pop” Quiz <ul><li>Why is water a poor rehydrator? </li></ul><ul><li>Identify two of the four things that sports drinks have that make them better than water. </li></ul><ul><li>The ideal carbohydrate content for a sports drink is: </li></ul><ul><ul><ul><li>A 3% B 6% C 9% D 12% </li></ul></ul></ul><ul><li>T or F – Sports drinks provide no benefit to an athlete involved in activity for less than 1 hour. </li></ul>
    25. 26. Bibliography <ul><li>&quot;Hydration.&quot; Sports Science Library . 2002. Gatorade Sports Science Institute. 11 May. 2005 <http://www.gssiweb.com/sportssciencecenter/topic.cfm </li></ul><ul><li>Prentice, William E., and Daniel D Arnheim. Essentials of Athletic Injury Management . 6th ed. New York: McGraw Hill, 2005. </li></ul><ul><li>“ Gatorade Research.&quot; Sports Science Library . 2002. Gatorade Sports Science Institute. 11 May. 2005 <http://www.gssiweb.com/reflib/refs/548/water_gatorade.cfm </li></ul>
    26. 27. “ The End”