1 / 17

Chapter 12 Stimulants

Chapter 12 Stimulants. Stimulants. Any agent temporarily increasing functional activity Provoke a stimulating action on the central nervous system Sympathomimetics Stimulates the sympathetic nervous system OTC & Prescription drugs. Why Use Stimulants ?.

marly
Download Presentation

Chapter 12 Stimulants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 12Stimulants

  2. Stimulants • Any agent temporarily increasing functional activity • Provoke a stimulating action on the central nervous system • Sympathomimetics • Stimulates the sympathetic nervous system • OTC & Prescription drugs

  3. Why Use Stimulants ? • Long seasons in professional sports • Baseball – 162 games • Use of other depressant drugs • Alcohol, marijuana, etc. • Need for an “energy boost” • Poor nutrition • Ergogenic • Performance enhancement

  4. Ephedra • Sympathomimetic • Banned in the USA (OTC,2004) • Ma Huang herb • Ephedra • Pseudoephedrine

  5. How Does It Work ? • Dilates the bronchiole muscles • Constricts nasal mucosa • Increases blood pressure

  6. Ephedra in OTC medications • Weight loss agents (older brands) • Decongestants • Asthma • Cold medications

  7. Package labeling can be misleading • Caffeine-ephedra mixture • Pseudoephedrine

  8. Pharmacokinetics • Available via internet in natural and synthetic forms • Peak plasma levels • Natural – 4 hours • Synthetic – 1 hour • Manufacturers of herbal supplements are not regulated like pharmaceutical companies • Labels may be misleading and actual composition may be vary greatly

  9. Energy booster • Decrease fatigue • Improve endurance, reaction time, and strength • Combination with caffeine • Synergistic • Additive and can potentiate • Table 12-1, pg 168

  10. Effect on Performance • Effect on athletic performance has not been proven in well-controlled scientific studies • Has not effected the sale, marketing, or use of the products • What to Tell the Athlete, pg 168

  11. Table 12-2: 2002 Winter Olympics IOC Testing of Nutritional Supplements

  12. Caffeine • In many foods, beverages and OTC supplements • Chocolate • Coffee • Soda • Vivarin

  13. Has been documented to have a ergogenic benefit for endurance athletes • Research is mixed; exact mechanism for effect on athlete performance unknown

  14. What is Caffeine ? • Xanthine group of drugs • Theophylline • CNS stimulant • Peak levels in 15 to 45 minutes • Half-life from 3 to 7 hours (non-exercise)

  15. How Does Caffeine Work? • Not completely positive • 3 theories • Metabolic • Neurologic • Muscle

  16. Habitual Caffeine User Vs. Nonuser • Early research indicated habitual user did not get an ergogenic effect • Tarnopolsky (2000) – now believes that all caffeine users can get an ergogenic benefit • Capsules appear to be more helpful

  17. What to Tell an Athlete • Pg 175

More Related