foot

Recommendations

Info

C h a p t e r 8 Performance Enhancing Drugs contributing to heat illness. Several prominent athletes have died while exercising due to the effects of stimulants. In addition, many of these substances are addictive with the need for increasing doses and then requiring a depressant, such as marijuana or alcohol in order to slow down afterwards. Stimulants are readily available in our culture and while small amounts of drugs like caffeine are usually not harmful, the concern is when large doses or multiple drugs are used. For example, an athlete may have 2 cups of coffee in the morning, several caffeinated soft drinks throughout the day, caffeine-containing energy drink (e.g. Red Bull®) before practice, over-the-counter pseudoephedrine and dietary supplements containing guarana or Citrus Aurantium. All of these contain varying amounts of stimulants and the combination can cause serious problems. It is imperative to be aware of the total amount of stimulants that an athlete may be consuming. NUTRITIONAL SUPPLEMENTS The 1994 Dietary Supplement Health and Education Act (DSHEA) unleashed a whole host of dietary supplements on the American consumer. These include vitamins, minerals, amino acids, plant derivatives and other natural and synthetic substances that come in a variety of forms, including powders, tablets and liquids. While this creates a great deal of confusion, one thing is very clear: dietary supplements are aggressively marketed to athletes. Despite all of the conflicting information on supplements, there are a few facts that are worth noting: 1) Dietary supplements are not regulated by the same laws as over-the-counter and prescription drugs. There is very little regulation of dietary supplements and many studies have found that many supplements do not contain what is on the labels. As a result, it is difficult to know with 100% certainty if what is on the label is really what you are taking. 2) Supplements can be contaminated with impurities that will result in a positive drug test. Whether unintentionally or intentionally, some athletes have tested positive from taking contaminated supplements. 3) Most supplements have not been subjected to rigorous studies that prove their positive effects. Due to labeling laws, the only restrictions on dietary supplements are that they cannot claim to treat a disease. Other than that, they can legally make a 230
C h a p t e r 8 Performance Enhancing Drugs wide variety of claims without medical proof. 4) Most of the substances that are available as dietary supplements can be easily and more cheaply obtained from the diet through good nutrition. There are a tremendous number of dietary supplements on the market with more appearing every day. Athletes are often approached to try a new product. The best advice is to check with a certified athletic trainer, physician or registered dietician before taking any dietary supplement. As a rule of thumb, if a product claims to “build muscle” it may contain a form of AAS. If it claims to “increase energy” it may contain a stimulant. Although it is impossible to provide details on every supplement, here are a few popular types. DHEA Dihydroepiandrosterone (DHEA) is the only relative of AAS that was left off the 2004 Anabolic Steroid Control Act and continues to be sold as a dietary supplement. DHEA is metabolized in the body to androstenedione, which is metabolized to testosterone. It is worth noting that while very little DHEA is converted to testosterone in men, DHEA does get converted to estradiol (a female hormone) as well. There are no studies demonstrating either performance enhancement with DHEA or strength gains in normal males. Because only a small amount of testosterone results from taking DHEA, it is likely that its greatest effects would occur in females and developing adolescent males. CREATINE Creatine is one of the most widely used nutritional supplements by athletes and has been touted for its ability to increase strength and power. Creatine comes from three sources: it is a natural substance found in foods, the body is able to make it, and it can also be prepared synthetically as a dietary supplement. The average diet contains 1-2 grams/day of creatine from protein-rich foods such as meat and fish. It is also naturally produced by the liver, pancreas and kidneys from the amino acids methionine, glycine and arginine at a rate of 1-2 grams/day. Although 90% of creatine is stored in skeletal muscle as free creatine and phosphocreatine, it is also found in the brain and testes. 231
Page 1 and 2:
1
Page 3 and 4:
LA84 FOUNDATION SOCCER COACHING MAN
Page 5 and 6:
T a b l e o f Co n t e n t s Soccer
Page 7 and 8:
C h a p t e r 1 A Philosophy for Co
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
C h a p t e r 2 Managing a Soccer P
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
C h a p t e r 3 Methods of Soccer T
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
C h a p t e r 4 Teaching Soccer Tec
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
C h a p t e r 5 Teaching Soccer Str
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180: C h a p t e r 5 Teaching Soccer Str
Page 191 and 192: C h a p t e r 6 Sportsmanship and t
Page 201 and 202: C h a p t e r 7 Managing Soccer Inj
Page 223 and 224: C h a p t e r 8 Performance-Enhanci
Page 225 and 226: C h a p t e r 8 Performance Enhanci
Page 229: C h a p t e r 8 Performance Enhanci
Page 237 and 238: C h a p t e r 9 Eating for Health a
Page 255 and 256: Flooding Zones: An offensive tactic
show all

foot

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?