Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Supplements and Ergogenics lecture


Published on

Published in: Health & Medicine, Business
  • Be the first to comment

Supplements and Ergogenics lecture

  1. 1. SUPPLEMENTS & ERGOGENICS Lona Sandon, M.Ed., R.D., L.D. Assistant Professor
  2. 2. OBJECTIVES List & state rational & purported benefits of supplements Explain regulations & labeling practices for supplements Analyze the available research on dietary supplements Provide practical advice to athletes Recognize supplements known to be harmful Describe how various supplements might work State resources available for dietitians and athletes to evaluate supplements and ergogenic aids
  3. 3. WHY ATHLETES USE SUPPLEMENTS Improve health Improve strength & power Gain or lose weight Burn fat Enhance energy Correct nutrient deficiencies Improve performance
  4. 4. WHAT IS AN ERGOGENIC AID? Ergo = “work” Genic = “to generate” Anything that helps to improve an athletes ability to perform better  Run faster  Lift heavier  Go longer
  5. 5. TYPES OF ERGOGENIC AIDS Physiological – improves functioning of body systems  Ex: enhances strength training, bicarbonate buffers blunt effects of lactic acid, blood doping increases oxygen carrying capacity Biomechanical – any equipment or devices that aids in performance  Ex: joint wraps/braces, body suits for swimming, lighter wheels in cycling
  6. 6. TYPES OF ERGOGENIC AIDS Psychological – mental strategies for overcoming performance anxieties  Ex:visualization training, lucky socks, preparation rituals Pharmacological – drugs used for the purpose of enhancing exercise performance  Ex:steroids, hormones, painkillers, amphetamines
  7. 7. TYPES OF ERGOGENIC AIDS Nutritional - includes foods, supplements, special dietary practices  Ex: caffeine, creatine, amino acids, sports gels, CHO loading
  8. 8. WHAT ARE DIETARY SUPPLEMENTS?Dietary Supplement Health & Education Act (DSHEA) of 1994 established definition: Not a food, or used as a food item Must include at least one of the following:  Vitamin  Mineral  Herb or other botanical  Amino acid  Dietary substance to supplement diet
  9. 9. REGULATION OF SUPPLEMENTS Can be marketed without proof of safety, efficacy, & quality Products containing new ingredients must notify the FDA, but do not require prior approval Manufacturer responsible for safety but not required to prove safety or efficacy
  10. 10. REGULATION OF SUPPLEMENTS “Facts” panel required All ingredients must be listed May include health, nutrient content, or structure/function claims on label Cannot claim to cure or treat disease
  11. 11. REGULATION OF SUPPLEMENTS(CONTINUED) FDA does not have the resources to monitor labeling claims closely Types of claims allowed:1. Nutrient content - “good source of calcium”2. Health – must be one of the FDA approved statements : “soluble fiber lowers cholesterol”3. Structure/function – unauthorized statements: “calcium builds strong bones”
  12. 12. SUPPLEMENT MARKETING Federal Trade Commission monitors marketing claims Common marketing techniques  Product endorsements by celebrities & athletes  Testimonials  Scientific breakthrough claims:  Unpublished “clinical” studies  Used in foreign country – “known in Europe for years”  False or untested structure/function claims
  13. 13. SAFETY OF SUPPLEMENTS Safety, potency, & identity of ingredients may be unknown Good Manufacturing Practices – GMPs  Voluntary quality control program & procedures within the industry
  14. 14. SAFETY OF SUPPLEMENTS Look for USP seal  2003 guidelines for quality, purity, ingredients, & manufacturing standards  Voluntary participation Buy from well- known companies
  15. 15. EVALUATING SUPPLEMENTS  Is there scientific research to back the claims?  Are the claims physiologically plausible?  Is it safe?  Is it effective?  What is the cost?  What are the ingredients?  Consider the risk-benefit ratio
  16. 16. MORE ABOUT SUPPLEMENTS Use is common among athletes ~ 60% Amount of active ingredient varies greatly & not always consistent with labeling Sometimes contain illegal substances or Rx drugs
  17. 17. COUNSELING ATHLETES ON SUPP. Do not simply dismiss use Understand athletes goals & reasons for supp. use Discuss safety & effectiveness of use Explain physiological mechanisms, potential side effects, & conditions for appropriate use Provide unbiased information Be an open-minded skeptic Stay up on supps by reading fitness magazines & visiting supp stores
  18. 18. WHAT IS DOPING? “Practice of enhancing performance using foreign substances or other artificial means” (Fink, Burgoon, Mikesky, p. 267) Growing problem in competitive & professional sports Oversight agencies  WADA – World Anti-doping Agency  USADA – US Anti-doping Agency
  19. 19. INADVERTENT DOPINGUnaware of ingesting the substance Causes:  Don’t know what is on the banned substance list  Unrecognizable name on ingredients list  Not included on the ingredient list, sometimes intentionally  Product contaminated during production
  20. 20. COMMON DOPING AGENTS Anabolics Prohormones and hormone releasers Fat reducers Anticatabolics Vitamins and minerals
  21. 21. ANABOLICS Increase ability to build muscle tissue Examples  Testosterone  Anabolic-androgenic hormones  Growth hormone – HGH  HMB (Beta-hydroxy-beta-methyl butyrate)  Leucine metabolite  Anticatabolic, minimize PRO breakdown  Appears safe & effective at dose of 3 g/d
  22. 22. PROHORMONES Claim to increase production of anabolic hormones Androstenedione; “Andro”  Testosterone precursor  May increase estrogen & risk for cancer  Decreases HDL cholesterol  Banned & illegal to market DHEA (dehydroepiandrosterone)  Testosterone & estrogen precursor  Poor efficacy if any
  23. 23. HORMONE-RELEASER Ornithine and arginine Clonidine
  24. 24. FAT REDUCERS Modes of action:  Decrease appetite  Increase fat breakdown for energy  Block absorption of ingested fats Caffeine – CNS stimulant, reduce sense of fatigue L-carnitine CLA (conjugate linoleic acid) Ephedrine – banned, risk of stroke/death, ↑ BP Commonly used by endurance athletes & those in aesthetic sports
  25. 25. ANTI-CATABOLICS Intended to help preserve lean body mass Examples  Glutamine  Branched chain amino acids  Leucine  Whey protein Commonly used by body builders
  26. 26. NUTRITIONAL ERGOGENICS USED BY ENDURANCE ATHLETES Branched chain  L-carnitine amino acids  Medium-chain Caffeine triglycerides (MCT) Coenzyme Q10  Pyruvate Energy bars  Sodium/electrolyte Energy gels tablets Ginseng  Sports beverages Glycerol
  27. 27. NUTRITIONAL ERGOGENICS USED BY STRENGTH/POWER ATHLETES Chromium  Protein powders Creatine  Protein bars Conjugated linoleic  Medium-chain acid triglycerides Growth hormone  Beta-hydroxy-beta- Anabolic steroids methyl butyrate
  28. 28. FIND THE RESEARCH MEDLINE/PubMed: Includes research/professional journals in the medical field CINAHL: Includes research/professional journals in nursing and allied health fields Sport Discus: Database that includes general media sources involving sport
  29. 29. WEB SITES Office of Dietary Supplements US Pharmacopeia Consumer Labs
  30. 30. SUMMARY Sports nutritionist must be aware of supplement use Most athletes use or have tried supplements Supplements are not tested for purity, safety, efficacy Supplements do not require FDA approval Supplements may contain banned substances Voluntary GMP and USP guidelines are used by some manufacturers FDA & FTC have limited resources to address abuse in the industry Buyer beware!
  31. 31. REFERENCESFink HH, Burgoon LA, Mikesky AE, eds. Practical Applications in Sports Nutrition. Sudbury, MA: Jones and Bartlett; 2012Dunford M, Smith M. Dietary supplements and ergogenic aids. In: Dunford M, ed. Sports Nutrition: A Practice Manual for Professionals, 4th ed. American Dietetic Association; 2006.