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Ergogenic Aids
Anything used to enhance athletic performance:
          •increase exercise capacity
           •enhance physiological processes
           •depress psychological inhibition
            •provide mechanical advantage
Performance Enhancing Drugs
           Abuses and Consequences




                    1922 Most Perfectly
                      Developed Man
Florence Joyner



   Arnold


                John McEnroe




Jesse Ventura
                               Lyle Alzado
1988 Summer Olympic Games, Ben Johnson tested
positive for anabolic-androgenic steroid stanozolol
Ancient Greece
  –Early Olympians use mushrooms, herbs, liquor, plant seeds.


Roman Period

  –Chariot racers drug horses and gladiators doped for vigorous and bloody spectacle.


Vikings
  –Psychedelic mushrooms


19th Century
  –Alcohol, caffeine, opium, strychnine, trimethyl


World War II
  –Amphetamines, testosterone
First Recorded Death Due to
Performance Enhancing Drugs - 1886?

Arthur Linton
Dies of stimulant
trimethyl
overdose




Only two Brits have won Bordeaux-Paris, Arthur Linton won in 1886 and Tom Simpson in
1963. Linton overdosed on trimethyl and Simpson died of amphetamines in 1967.
Cycling – Most Doped Sport?
            • 1960 Danish cyclist
              Knut Jensen on
              amphetamine-
              powered bicycle dies

            • July 13, 1967 British
              cyclist Tom Simpson
              dies on Mt. Ventoux
              – Amphetamines
1998 Tour De France



                   French team Festina
                   


                       Amphetamines

                       EPO

                       AAS

                       hGH

                       Prescription     drugs
                       Narcotics

Richard Virenque
DOPING
                     • Dutch doop
                          – Viscous opium juice
                     • World Anti-Doping Agency (WADA)
                     • U.S. Anti-Doping Agency (USADA)

“The presence of a prohibited substance or its metabolites or markers in an athlete’s
bodily specimen; use or attempted used of a prohibited substance or method;
tampering, or attempting to tamper, with any part of doping control; possession of
prohibited substances and methods, trafficking in any prohibited substance or
prohibited method; administration or attempted administration of a prohibited
substance or prohibited method to any athlete, assisting, encouraging, aiding,
abetting, covering up or any other type of complicity involving an anti-doping rule
violation or any attempted violation”
DOPING
       • Withdrawing and saving red
         blood cells for later re-infusion


Dr. Bjorn Ekblom
invented “blood packing”
in 1972



       • Later the term was used to
         describe taking Erythropoietin

       • Generic term to describe any
         illegal performance- enhancing
         drug
History of Doping in Sport
1860’s – Amsterdam swimmers take
speedballs – mix of heroin and cocaine.
1904 - Marathoner Thomas Hicks dies
at Olympics – “stimulating strychnine
and courage-inspiring brandy”
1935 - Testosterone was first
synthesized, and German soldiers were
reportedly using it to perform better
and to become more aggressive.
1950’s – During the 1952 Olympics the
Russian weightlifting team won the
gold medal due to synthetic steroid
Historical Controversy
The controversy surrounding steroids began in the 1950’s during the Olympic
Games when the athletic community discovered that athletes from Russia and
some East European nations, which had dominated the games, had taken large
doses of steroids. It became evident that they had not been "healthy" due to
the fact that many of the male athletes developed such large prostate glands
that they needed a tube inserted in order to urinate. The females of these
nations had developed so many male characteristics that chromosome tests
were needed to prove that they were still female.
1950’s (cont) – A U.S. pharmaceutical firm develops the
first anabolic steroids.
1952 Amphetamine-related illnesses of speed skaters in
Olympics in Oslo, Norway
1968 Olympic drug testing begins in Mexico City
1975 – The International Olympic Committee officially
bans the use of steroids, just prior to 1976 Montreal
Games
1976 Olympics

     East German Swimmers won 11 out of 13
     Olympic events.

     In 1990 it emerges that they had been
     on an organized drug program
Newer agents

  –Erythropoietin (EPO)

  –Growth hormone (hGH)

  –Tetrahydrogestrinone (THG)
Avoiding Detection




            Weightlifters Machine
1992
• German sprinters Katrin Krabbe, Silke Muller
  and Grit Breuer submit identical urine samples




                Later suspended for + clenbuterol test
Scientific Milestones becoming
        Sports Millstone
Future Performance
             Enhancing Techniques?
Perfluorocarbon (PFC)

  –Synthetic blood

  –Enormous O2 carrying capacity

  –X-country skiers and skaters in Nagano?
Myostatin Inhibitors?



                            Belgian Blue Cow




Myostatin knock-out mouse


                             Flex Wheeler
Insulin-Like Growth Factor –
           1 (IGF-I)
Detection of Illegal “Nutrition”
   •Random drug tests during competition
              (forces athletes to become more sophisticated in use)
   •Unannounced drug tests year-round
   •Lie detectors
1. Steroids – Derivatives of Testosterone
     *Banned by the NCAA and IOC
     *Illegal to use outside of physician supervision and dosing recommendations

     A. Anabolic: “to build”
     -accelerated growth of bone, muscle, red cells, and enhanced neural conduction

     B. Androgenic: “produce male-like traits”

     C. Do they work?

     -How they work:
                     Promote Anabolism:
                              •Intracellular androgen receptors bind to nuclear chromatin to
activate                      ribonucleic acid-polymerase system

                                •Heavy resistance training is required for beneficial effects
                     Prevent Catabolism:
                               •cross binding with glucocorticoid receptors interferes with
glucocorticoid                            receptor-activated catabolism

                                •faster recovery time *May also decrease fat mass and increase use of
                                                      fat for energy
How Steroids Work
• Exert actions inside cells

• Binds to androgen receptors
  inside the cell

• Influences gene transcription and
  translation to enhance protein
  production
Psychological Effects
    •   Increased sense of well-being
    •   Irritability
    •   Mania
    •   Depression
    •   Euphoria
    •   Aggressiveness
    •   Enhanced pain tolerance
    •   Sexual arousal
    •   Suicidality
Side Effects
• There really aren’t any…          • Side effects are real and
                                      potentially very severe
   – Med Sci Sport Exerc 38(9);
     1578, 2006                        – J Phys Act Health 2; 460,
                                         2005
   – Future predictors of AAS use
       • Alcohol use
       • Power sports
Side Effects

Elevated LDH                          Prostatic hypertrophy
Elevated blood pressure               Prostate cancer
Edema                                 Risk of AIDS/Hep
Accelerated clotting                  ↓ immune function
↑ cholesterol, TG, and LDL            Irregular Heart Beats
Depressed HDL                         GI distress
Elevated blood glucose                Muscle cramps/spasms
Psychosis                             Increased nervous tension
Altered electrolyte balance           Nosebleeds
Decreased spermatogenesis             Clitoral enlargement
Lowered testosterone levels           Lowered voice
↓LH and FSH production                Acne
Increased urine production            Sore nipples
Altered Libido                        Increased aggressiveness
Premature closure of epiphyses        Decreased sperm count
AIDS/HIV or TB                        Cancer
Side Effects
• Cardiovascular
  – Elevates “bad” LDL cholesterol
  – Elevates blood pressure
  – Promotes blood clots
  – Left ventricular hypertrophy
  – Cardiac arrhythmia
  *Operative Risk
Side Effects
• Hepatic
   – Elevated liver enzymes
       • Alanine and aspartate aminotransferases
   – Formation of blood filled cysts
       • Peliosis hepatis
   – Liver cancer: hepatocellular carcinoma
   – Impaired bile flow: cholestasis

       *Orally administered steroids
Side Effects
• Dermatologic
  – Acne: propionibacteria acnes
  – Hair loss: alopecia
  – Excessive hair growth: hirsutism
  – Stretch marks: striae
Side Effects
• Endocrine/Reproductive
   – Men
      •   Libido changes
      •   Testicular atrophy
      •   Impotence
      •   Prostatic hypertrophy
   – Women
      •   Masculinization
      •   Menstrual irregularities
      •   Reduced breast size
      •   Clitoral enlargement
Side Effects
• Behavioral
   –   Depression
   –   Mania
   –   Psychosis
   –   Aggression
   –   Withdrawal syndrome
        •   Fatigue
        •   Depression
        •   Reduced libido
        •   Craving next cycle
Derrick Whitsett
 Died Jan 2004




Sonny Schmidt – Died at 50
9 years after being Master’s
Olympia Champion
Detecting Steroid Use
Detecting Steroid Use
       • Appearance
          – Muscular hypertrophy
          – Gynecomastia

       • Skin
          – Acne, stretch marks, needle marks,
          baldness

       • Behavioral changes

       *enlarged nipples
2. Human Chorionic Gonadotropin
Used to boost endogenous testosterone and prevent muscle loss after steroid use.

*anabolic adjunct – mimics leuteinizing hormone to stimulate testosterone

(Pregnancy test)

Some reports that HCG may aid in weight loss…
3. Human Growth Hormone hGH
      •increases lean body mass primarily by hyperplasia and facilitated AA transport into cells

            -hGH persistently stimulates IGF-1
            -reduces fat mass (perhaps by stimulating lipolysis)

     •side effects:
            -incorrect usage/dosage
            -Stimulates the growth of all tissues, not just muscle (including internal organs; resembles
acromegaly)
            -Left ventricular hypertrophy w/ ↓ SV
         -Swollen feet and ankles, joint pain, carpal tunnel syndrome,
         -Development of a diabetic or prediabetic condition
4. “Androgens”
Androstenedione and Dehydroepiandrosterone: weak adrenal androgens

          •1600 mg/day 30% decline in fat mass

          •300 mg/day increases serum testosterone
Eight Research Findings - Androgens
   Little or no elevation of plasma testosterone concentrations
   No favorable effect on muscle mass
   No favorable effect on muscular performance
   No favorable alterations in body composition
   Elevates a variety of estrogen subfractions
   No favorable effects on muscle protein synthesis or tissue anabolism
   Impairs the blood lipid profile in apparently healthy men
   Increases likelihood of testing positive for steroid use
5. Insulin
• Promotes anabolism and stimulates IGFs

*risks hypoglycemic shock
6. Clenbuterol
Beta- adrenoceptor 2 agonist, central stimulant, stimulates protein anabolism, and acts as a thermogen.

           •endurance athletes

           •serious side effects: MI, cardiomegally, anorexia, and insomnia.
7. HMB
beta-hydroxy-beta-methylbutyrate: amino acid
metabolite

•may boost muscle mass and strength
•may decrease protein loss during stress by inhibiting
protein catabolism
•increases fatty acid oxidation

•The mechanism for HMB’s action on muscle
metabolism, strength improvement, and body
composition remains unknown.
2g/day for up to 28 days
                        8. Creatine Monohydrate
      -Can be derived from protein in foods (but not in same quantity)
      -Doesn’t improve endurance, strength, or power, not an anabolic, and doesn’t improve lactate tolerance
      -Can improve short-term high-intensity repetitive exercise, best for improving

“burst-type, phasic activity”

-body building

-skating

-sprints

-basketball
      -Significant increases in body weight and muscle


cross-sectional area.

*potent placebo effect

•Risks? No long term studies yet


Muscle cramps
9. Amphetamines
psychotropic drugs that mask fatigue
            •do not have a pure physiological effect, mainly improve reaction time and stamina in
fatigued states (mostly animal studies).
           •Side effects: numerous deaths in sport are ascribed to
           amphetamines.
                                arrhythmias             hypertension         angina
                                hypothermia             hallucinations       aggressiveness


                                  http://www.youtube.com/watch?v=YtAyGvZqiwk


                                                     •   1960 Danish cyclist Knut Jensen on
                                                         amphetamine- powered bicycle dies

                                                     •   July 13, 1967 British cyclist Tom
                                                         Simpson dies on Mt. Ventoux
                                                          – Amphetamines
Stimulant that increases lipid mobilization and utilization

                                 10. Caffeine
•prolongs endurance by increasing fat utilization and reducing COH

•may increase speed of muscle contraction

•IOC limits caffeine (4-7 cups of coffee 30 min prior to ex)


600-800 mg

*Effectiveness is reduced as use of caffeine increases
Warnings about Caffeine
 Effects become less apparent when
  someone:
    -Consumes a high-carbohydrate diet
    -Uses caffeine habitually
 Can cause restlessness, headaches,
  insomnia, nervous irritability, muscle
  twitching, tremulousness, psychomotor
  agitation, and elevated heart rate and blood
  pressure and trigger premature left
  ventricular contractions
 Acts as a diuretic
11. Buffers
Prevent metabolic and lactate acidosis
           •sodium bicarbonate
           •sodium citrate
           *diuresis and gas (extreme gi distress in 50% of users)
12. Anti-Cortisol Compounds
reduce protein breakdown by inhibiting cortisol release.

           •Phosphatidylserine
           •Glutamine




                          13. COH Loading
             •Prolongs endurance performance
             •Improves training time
             •Prevents use of protein for energy
             •“Supercompensation” after COH depletion
                        -increased water retention
                        -gi problems
                        -compromised training during depletion phase
14. B Vitamin Loading
 •Folate, B-6 and B-12 for muscle building
•Niacin, Riboflavin and Thiamin for endurance performance



15. Amino Acid Supplements
 Protein Shakes
 •May help prevent catabolism after a hard workout…
 •Conflicting Reports?



                 16. L-Carnitine
  •Carnitine levels correlate well with use of lipids as energy source during exercise.
  •May improve endurance performance (~6%)
  •Beware of racemic mixtures (D,L-Carnitine) D-Carnitine
                         causes muscle cramps and weakness.
17. Chromium
  •May decrease body fat, increase lean mass and reduce LDL
 •Effect is marginal at best
             -some studies show placebo works better
             -some studies show increased muscle mass without increased strength
 •Competes for iron and zinc binding proteins in gi tract




18. Ephedra/Ephedrine/Ma Huang
 Sympathomimetic, alpha and beta receptor agonist

 -increases metabolic rate
 -may enhance mobilization of fats, and suppress appetite
 -not an ergogenic aid

 -Risks: Sudden death, Tachycardia, PVC, intracerebral hemorrhage, Increased BP
                                            other vascular events
19. Blood Doping: 2 ways
           Autologous RBC’s or Exogenous Erythropoietin

           •Improves O2 carrying capacity
           •Can improve VO2 max
           •increases viscosity of the blood (increased work of heart)

•Erythropoietin: hormone that stimulates RBC production
-side effects: hypertension, stroke, heart failure, seizures
Performance Enhancing Drugs: History, Types, Effects

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Performance Enhancing Drugs: History, Types, Effects

  • 1. Ergogenic Aids Anything used to enhance athletic performance: •increase exercise capacity •enhance physiological processes •depress psychological inhibition •provide mechanical advantage
  • 2. Performance Enhancing Drugs Abuses and Consequences 1922 Most Perfectly Developed Man
  • 3.
  • 4. Florence Joyner Arnold John McEnroe Jesse Ventura Lyle Alzado
  • 5. 1988 Summer Olympic Games, Ben Johnson tested positive for anabolic-androgenic steroid stanozolol
  • 6. Ancient Greece –Early Olympians use mushrooms, herbs, liquor, plant seeds. Roman Period –Chariot racers drug horses and gladiators doped for vigorous and bloody spectacle. Vikings –Psychedelic mushrooms 19th Century –Alcohol, caffeine, opium, strychnine, trimethyl World War II –Amphetamines, testosterone
  • 7. First Recorded Death Due to Performance Enhancing Drugs - 1886? Arthur Linton Dies of stimulant trimethyl overdose Only two Brits have won Bordeaux-Paris, Arthur Linton won in 1886 and Tom Simpson in 1963. Linton overdosed on trimethyl and Simpson died of amphetamines in 1967.
  • 8. Cycling – Most Doped Sport? • 1960 Danish cyclist Knut Jensen on amphetamine- powered bicycle dies • July 13, 1967 British cyclist Tom Simpson dies on Mt. Ventoux – Amphetamines
  • 9. 1998 Tour De France French team Festina  Amphetamines EPO AAS hGH Prescription drugs Narcotics Richard Virenque
  • 10. DOPING • Dutch doop – Viscous opium juice • World Anti-Doping Agency (WADA) • U.S. Anti-Doping Agency (USADA) “The presence of a prohibited substance or its metabolites or markers in an athlete’s bodily specimen; use or attempted used of a prohibited substance or method; tampering, or attempting to tamper, with any part of doping control; possession of prohibited substances and methods, trafficking in any prohibited substance or prohibited method; administration or attempted administration of a prohibited substance or prohibited method to any athlete, assisting, encouraging, aiding, abetting, covering up or any other type of complicity involving an anti-doping rule violation or any attempted violation”
  • 11. DOPING • Withdrawing and saving red blood cells for later re-infusion Dr. Bjorn Ekblom invented “blood packing” in 1972 • Later the term was used to describe taking Erythropoietin • Generic term to describe any illegal performance- enhancing drug
  • 12. History of Doping in Sport 1860’s – Amsterdam swimmers take speedballs – mix of heroin and cocaine. 1904 - Marathoner Thomas Hicks dies at Olympics – “stimulating strychnine and courage-inspiring brandy” 1935 - Testosterone was first synthesized, and German soldiers were reportedly using it to perform better and to become more aggressive. 1950’s – During the 1952 Olympics the Russian weightlifting team won the gold medal due to synthetic steroid
  • 13. Historical Controversy The controversy surrounding steroids began in the 1950’s during the Olympic Games when the athletic community discovered that athletes from Russia and some East European nations, which had dominated the games, had taken large doses of steroids. It became evident that they had not been "healthy" due to the fact that many of the male athletes developed such large prostate glands that they needed a tube inserted in order to urinate. The females of these nations had developed so many male characteristics that chromosome tests were needed to prove that they were still female.
  • 14.
  • 15. 1950’s (cont) – A U.S. pharmaceutical firm develops the first anabolic steroids. 1952 Amphetamine-related illnesses of speed skaters in Olympics in Oslo, Norway 1968 Olympic drug testing begins in Mexico City 1975 – The International Olympic Committee officially bans the use of steroids, just prior to 1976 Montreal Games
  • 16. 1976 Olympics East German Swimmers won 11 out of 13 Olympic events. In 1990 it emerges that they had been on an organized drug program
  • 17. Newer agents –Erythropoietin (EPO) –Growth hormone (hGH) –Tetrahydrogestrinone (THG)
  • 18. Avoiding Detection Weightlifters Machine
  • 19.
  • 20. 1992 • German sprinters Katrin Krabbe, Silke Muller and Grit Breuer submit identical urine samples Later suspended for + clenbuterol test
  • 21. Scientific Milestones becoming Sports Millstone
  • 22. Future Performance Enhancing Techniques? Perfluorocarbon (PFC) –Synthetic blood –Enormous O2 carrying capacity –X-country skiers and skaters in Nagano?
  • 23. Myostatin Inhibitors? Belgian Blue Cow Myostatin knock-out mouse Flex Wheeler
  • 24. Insulin-Like Growth Factor – 1 (IGF-I)
  • 25. Detection of Illegal “Nutrition” •Random drug tests during competition (forces athletes to become more sophisticated in use) •Unannounced drug tests year-round •Lie detectors
  • 26. 1. Steroids – Derivatives of Testosterone *Banned by the NCAA and IOC *Illegal to use outside of physician supervision and dosing recommendations A. Anabolic: “to build” -accelerated growth of bone, muscle, red cells, and enhanced neural conduction B. Androgenic: “produce male-like traits” C. Do they work? -How they work: Promote Anabolism: •Intracellular androgen receptors bind to nuclear chromatin to activate ribonucleic acid-polymerase system •Heavy resistance training is required for beneficial effects Prevent Catabolism: •cross binding with glucocorticoid receptors interferes with glucocorticoid receptor-activated catabolism •faster recovery time *May also decrease fat mass and increase use of fat for energy
  • 27. How Steroids Work • Exert actions inside cells • Binds to androgen receptors inside the cell • Influences gene transcription and translation to enhance protein production
  • 28. Psychological Effects • Increased sense of well-being • Irritability • Mania • Depression • Euphoria • Aggressiveness • Enhanced pain tolerance • Sexual arousal • Suicidality
  • 29. Side Effects • There really aren’t any… • Side effects are real and potentially very severe – Med Sci Sport Exerc 38(9); 1578, 2006 – J Phys Act Health 2; 460, 2005 – Future predictors of AAS use • Alcohol use • Power sports
  • 30. Side Effects Elevated LDH Prostatic hypertrophy Elevated blood pressure Prostate cancer Edema Risk of AIDS/Hep Accelerated clotting ↓ immune function ↑ cholesterol, TG, and LDL Irregular Heart Beats Depressed HDL GI distress Elevated blood glucose Muscle cramps/spasms Psychosis Increased nervous tension Altered electrolyte balance Nosebleeds Decreased spermatogenesis Clitoral enlargement Lowered testosterone levels Lowered voice ↓LH and FSH production Acne Increased urine production Sore nipples Altered Libido Increased aggressiveness Premature closure of epiphyses Decreased sperm count AIDS/HIV or TB Cancer
  • 31. Side Effects • Cardiovascular – Elevates “bad” LDL cholesterol – Elevates blood pressure – Promotes blood clots – Left ventricular hypertrophy – Cardiac arrhythmia *Operative Risk
  • 32. Side Effects • Hepatic – Elevated liver enzymes • Alanine and aspartate aminotransferases – Formation of blood filled cysts • Peliosis hepatis – Liver cancer: hepatocellular carcinoma – Impaired bile flow: cholestasis *Orally administered steroids
  • 33. Side Effects • Dermatologic – Acne: propionibacteria acnes – Hair loss: alopecia – Excessive hair growth: hirsutism – Stretch marks: striae
  • 34. Side Effects • Endocrine/Reproductive – Men • Libido changes • Testicular atrophy • Impotence • Prostatic hypertrophy – Women • Masculinization • Menstrual irregularities • Reduced breast size • Clitoral enlargement
  • 35. Side Effects • Behavioral – Depression – Mania – Psychosis – Aggression – Withdrawal syndrome • Fatigue • Depression • Reduced libido • Craving next cycle
  • 36. Derrick Whitsett Died Jan 2004 Sonny Schmidt – Died at 50 9 years after being Master’s Olympia Champion
  • 38. Detecting Steroid Use • Appearance – Muscular hypertrophy – Gynecomastia • Skin – Acne, stretch marks, needle marks, baldness • Behavioral changes *enlarged nipples
  • 39. 2. Human Chorionic Gonadotropin Used to boost endogenous testosterone and prevent muscle loss after steroid use. *anabolic adjunct – mimics leuteinizing hormone to stimulate testosterone (Pregnancy test) Some reports that HCG may aid in weight loss…
  • 40. 3. Human Growth Hormone hGH •increases lean body mass primarily by hyperplasia and facilitated AA transport into cells -hGH persistently stimulates IGF-1 -reduces fat mass (perhaps by stimulating lipolysis) •side effects: -incorrect usage/dosage -Stimulates the growth of all tissues, not just muscle (including internal organs; resembles acromegaly) -Left ventricular hypertrophy w/ ↓ SV -Swollen feet and ankles, joint pain, carpal tunnel syndrome, -Development of a diabetic or prediabetic condition
  • 41. 4. “Androgens” Androstenedione and Dehydroepiandrosterone: weak adrenal androgens •1600 mg/day 30% decline in fat mass •300 mg/day increases serum testosterone
  • 42. Eight Research Findings - Androgens  Little or no elevation of plasma testosterone concentrations  No favorable effect on muscle mass  No favorable effect on muscular performance  No favorable alterations in body composition  Elevates a variety of estrogen subfractions  No favorable effects on muscle protein synthesis or tissue anabolism  Impairs the blood lipid profile in apparently healthy men  Increases likelihood of testing positive for steroid use
  • 43. 5. Insulin • Promotes anabolism and stimulates IGFs *risks hypoglycemic shock
  • 44. 6. Clenbuterol Beta- adrenoceptor 2 agonist, central stimulant, stimulates protein anabolism, and acts as a thermogen. •endurance athletes •serious side effects: MI, cardiomegally, anorexia, and insomnia.
  • 45. 7. HMB beta-hydroxy-beta-methylbutyrate: amino acid metabolite •may boost muscle mass and strength •may decrease protein loss during stress by inhibiting protein catabolism •increases fatty acid oxidation •The mechanism for HMB’s action on muscle metabolism, strength improvement, and body composition remains unknown.
  • 46. 2g/day for up to 28 days 8. Creatine Monohydrate -Can be derived from protein in foods (but not in same quantity) -Doesn’t improve endurance, strength, or power, not an anabolic, and doesn’t improve lactate tolerance -Can improve short-term high-intensity repetitive exercise, best for improving “burst-type, phasic activity” -body building -skating -sprints -basketball -Significant increases in body weight and muscle cross-sectional area. *potent placebo effect •Risks? No long term studies yet Muscle cramps
  • 47. 9. Amphetamines psychotropic drugs that mask fatigue •do not have a pure physiological effect, mainly improve reaction time and stamina in fatigued states (mostly animal studies). •Side effects: numerous deaths in sport are ascribed to amphetamines. arrhythmias hypertension angina hypothermia hallucinations aggressiveness http://www.youtube.com/watch?v=YtAyGvZqiwk • 1960 Danish cyclist Knut Jensen on amphetamine- powered bicycle dies • July 13, 1967 British cyclist Tom Simpson dies on Mt. Ventoux – Amphetamines
  • 48. Stimulant that increases lipid mobilization and utilization 10. Caffeine •prolongs endurance by increasing fat utilization and reducing COH •may increase speed of muscle contraction •IOC limits caffeine (4-7 cups of coffee 30 min prior to ex) 600-800 mg *Effectiveness is reduced as use of caffeine increases
  • 49. Warnings about Caffeine  Effects become less apparent when someone: -Consumes a high-carbohydrate diet -Uses caffeine habitually  Can cause restlessness, headaches, insomnia, nervous irritability, muscle twitching, tremulousness, psychomotor agitation, and elevated heart rate and blood pressure and trigger premature left ventricular contractions  Acts as a diuretic
  • 50. 11. Buffers Prevent metabolic and lactate acidosis •sodium bicarbonate •sodium citrate *diuresis and gas (extreme gi distress in 50% of users)
  • 51. 12. Anti-Cortisol Compounds reduce protein breakdown by inhibiting cortisol release. •Phosphatidylserine •Glutamine 13. COH Loading •Prolongs endurance performance •Improves training time •Prevents use of protein for energy •“Supercompensation” after COH depletion -increased water retention -gi problems -compromised training during depletion phase
  • 52. 14. B Vitamin Loading •Folate, B-6 and B-12 for muscle building •Niacin, Riboflavin and Thiamin for endurance performance 15. Amino Acid Supplements Protein Shakes •May help prevent catabolism after a hard workout… •Conflicting Reports? 16. L-Carnitine •Carnitine levels correlate well with use of lipids as energy source during exercise. •May improve endurance performance (~6%) •Beware of racemic mixtures (D,L-Carnitine) D-Carnitine causes muscle cramps and weakness.
  • 53. 17. Chromium •May decrease body fat, increase lean mass and reduce LDL •Effect is marginal at best -some studies show placebo works better -some studies show increased muscle mass without increased strength •Competes for iron and zinc binding proteins in gi tract 18. Ephedra/Ephedrine/Ma Huang Sympathomimetic, alpha and beta receptor agonist -increases metabolic rate -may enhance mobilization of fats, and suppress appetite -not an ergogenic aid -Risks: Sudden death, Tachycardia, PVC, intracerebral hemorrhage, Increased BP other vascular events
  • 54. 19. Blood Doping: 2 ways Autologous RBC’s or Exogenous Erythropoietin •Improves O2 carrying capacity •Can improve VO2 max •increases viscosity of the blood (increased work of heart) •Erythropoietin: hormone that stimulates RBC production -side effects: hypertension, stroke, heart failure, seizures

Hinweis der Redaktion

  1. From the standpoint of temperature regulation, caffeine’s effect as a potent diuretic could cause unnecessary pre-exercise loss of fluid that negatively affects thermal balance and exercise performance in a hot environment.