nutrition in action how to fuel your body for sports and health trinity-pawling school
TRANSCRIPT
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Nutrition in Action
How to fuel your body
for sports and health
Trinity-Pawling School
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What are the best energy foods?
• .
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Carbohydrates !
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Sources of Energy
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Carbohydrates 4
Protein 4
Fat 9
Calories/gram
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Stored Energy for Exercise
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Carbohydrate is stored in—Muscle Muscle fuel 1,400 calories
Liver Blood sugar 320
Blood Brain fuel 80
Fat is stored in—
Adipose tissue Muscle fuel 70,000
Intramuscular Muscle fuel 1,500
Based on 150 lb man with 12% body fat
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Training increases muscle glycogen
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Untrained 13
Trained 32
Carbo-loaded 35-40
Grams glycogen/kg muscle
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0
4
8
12
16
20
24
RECOVERY TIME
GLYCOGEN CONTENT
5 15 25 35 45 hours 5 days
(GM/KG MUSCLE)
Rest/
hard exercise
Carbohydrate Diet
Protein & Fat Diet
Nancy Clark, MS, RN
Glycogen is made from carbohydrates
Carb
Pro + Fat
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Carbohydrates for rapid recovery
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After hard exercise, consume 0.5 to 0.75 g carb/lb*–
• As soon as tolerable 0 - 30 minutes post-exercise
• At next meal 1 - 2 hours post-exercise
• Snacks Every two hours for 6 hours
* a little protein can also be beneficial
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Recovery Foods
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Carb (g) Pro (g) Cals
Yogurt, flavored, 6 oz 26 8 160
Bean Burrito, 6 oz. 46 11 310
1 instant breakfast w/8 oz. skim milk 39 13 220
Cheerios w/ milk 32 11 200
Pasta + meat sauce 80 20 450
Be responsible and plan ahead!
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Liquid Recovery Options Goal: three times more carb than protein
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Gatorade 14 --
Coke 26 --
Cranberry Juice 43 --
Chocolate milk 29 8
Endurox R4 35 8.5
Fluid Gm Carb/8 oz. Gm Pro/8 oz
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0.5
2.5
2.0
1.5
1.0
10 miles 10 miles10 miles
DAY 1 DAY 2 DAY 3
MUSCLE GLYCOGEN(GM/100 GM TISSUE)
Low carb + repeated exercise = fatigue
Nancy Clark, MS, RN
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What kinds of carbs should I eat?
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Choose “Quality Carbs” - Fruit!
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EAT LESS: Refined Sugars EAT MORE: Natural sugars
Soda pop Fruit juices
Sports drinks Raisins
Candy All fruits
Natural sugars are preferable to refined sugars
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Quality Carbs – Grains and Beans
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Choose more whole or lightly processed grains
Bran flakes, oatmeal, Wheaties
Whole wheat bread, bagels, rolls or crackers
Corn tortillas, whole wheat pita
Chili, lentils, hummus, split pea soup
Potato, (brown) rice, (whole wheat) pasta
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Carbohydrate-loading for endurance exercise
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How to Carbohydrate-Load
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• Maintain familiar, high-carb training diet
-Enjoy carbs as the foundation of each meal
(~ 3 to 5 gm carb/lb)
• Reduce pre-event training-Muscles need time to get fully fueled
The carbohydrates saved by not exercising
get used to “carbo-load” the muscles.
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Guide to Good Eating
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Building your sports diet
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Carbs: The foundation of each meal
~3 - 5 gm Carbohydrate / lb body weight
Protein: Accompaniment to each meal
~0.5-0.75 gm Pro/ lb body weight
Fat: A little (healthy) fat at each meal~25% of total calories (~50-80 g/day)
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DON’T JUST EAT; EAT RIGHT–
Breads, cereals, whole grains
At each meal choose foods made from
Wheat
Rice
Corn
Oats
Whole grains should be at least half your choices
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Foundation of every meal–for carbohydrates, fiber, B-vitamins
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DON’T JUST EAT; EAT RIGHT–
Fruits & vegetables
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A generous amount with each meal (fiber, carbs, phytochemicals, C, A)
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DON’T JUST EAT; EAT RIGHT– Protein-rich foods
Chicken, turkey, fish
Lean beef, pork, lamb
Milk, yogurt, cheese*
Eggs
Nuts, peanut butter
Lentils, beans, tofu
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Small amount at each meal for protein, iron, zinc
*Poor sources of iron and zinc
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DON’T JUST EAT; EAT RIGHT–
Calcium-rich foods
1 cup Milk or Yogurt, low-fat1.5 oz. Cheese. low-fat 2 cups Cottage cheese, low-fat
Non-dairy sources
8 oz. Soy milk or Tofu1 cup Calcium-enriched orange juice1.5 cup Broccoli, kale, leafy green vegetable3-4 oz. Salmon or sardines with bones
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3 - 4 low-fat servings daily
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Food labels: Useful information!
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Carbs
Protein
Fat
Skim vs 2% Milk
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How to calculate calories
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Ice cream (Haagen Dazs) 1/2 cup = 250 calories
20 gm CARB x 4 cals/gm = 80 Carb-cals (32%)
17 gm FAT x 9 cals/gm = 150 Fat-cals (60%)
5 gm PRO x 4 cals/gm = 20 Pro-cals (8%)
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Breakfast Choices: High Fat vs High Carb
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Eggs, 2 fried
Bacon, 2 slices
Buttered toast, 2 slices
Total calories: 500
55% fat, 25% carb
Cereal, big bowl
Banana, medium
Milk (2% fat), 8 ounces
Total calories: 500 10% fat, 75% carb
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Meal choices: High fat vs high carb
Big Mac
Small fries
Total calories: 800
40% fat, 40% carb
Spaghetti, 2.5 cups
Tomato sauce, meat balls
Total calories: 800
20% fat, 60% carb
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A little bit...? A lot…?
How much protein do I need?
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To build muscles—
• Strength training (+ maturity)
• Adequate protein (pre- & post-exercise)
• Extra calories (from carbohydrates)
• Frequent eating throughout the day
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Protein needs vary
Protein needs increase with–
• Growth
• Start of an exercise program
• Calorie restriction (dieting, anorexia)
• Depleted glycogen stores
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Protein needs
Current RDA, sedentary adult 0.4
Recreational exerciser, adult 0.5 - .75
Competitive athlete 0.6 - 0.8
Growing teenage athlete 0.9 - 1.0
Adult building muscle mass 0.7 - 0.8
Athlete restricting calories 0.8 - 1.0
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Grams Protein/lb
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Protein from standard foods
HS Football player, 200 lbs 0.7 - 1.0 140 - 200 Marathoner, 150 lbs 0.6 - 0.8 90 - 120 Young gymnast, 80 lbs 0.9 - 1.0 72 - 80
Safe intake/lb Gm PRO/day
1 Egg 7 gm PRO
2 Tb Peanut butter 8
16 oz Milk 16
1 can Tuna (6 oz) 40
6 oz Chicken or Beef 45
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Would extra protein supplements help?
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Insert illustration
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Protein: Supplements vs food
Tuna, 6 oz can 40
Beef, deli, 4 oz 32
16 ounces milk, 16
Greek yogurt, 6 oz. 15
Met-Rx, 1 pkt. 38
Protein Bar, PowerBar 23
Gm Pro/serv
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Is red meat bad for your health?
Truth: Lean red meat is excellent for:
• Iron - to prevent anemia
• Zinc - to help with healing
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Truth: Fatty red meat is bad
Limit greasy burgers, pepperoni, bacon, sausage.
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Tips for Vegetarian Athletes
• Eat generous portions of beans, tofu, peanut butter - Plant proteins are not concentrated sources of protein.
1/2 cup beans only 6 g protein1/4 cake tofu only 6-8 g2 tbsp peanut butter only 7-8 g
• Milk, yogurt & cheese are protein boosters1 cup low-fat milk 8 g protein1 oz cheese stick 8 g 1 cup Greek yogurt 23 g
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Should I take vitamin supplements?
Does exercise increase vitamin needs?
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Do athletes need extra vitamins & minerals?
• Athletes & non-athletes had similar vitamin status
• Exception: Athletes had lower serum ferritin (iron)
• Stronger vitamin status ≠ better performance (apart from anemia) CONCLUSION: Athletes generally eat extra vitamins!
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A review of 90 studies examining vitamin and mineral status in athletes’ blood suggests–
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For vitamins: Eat healthful foods!
The more you exercise–
• the more food you can eat.
• the more vitamins you can get.
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Vitamins are re-used, not used up.
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What & when should I eat pre-exercise?
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Pre-exercise fuel improves performance
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7 subjects, carbo-loaded x 3 days; biked hard to exhaustion
Trial A: No breakfast
109 minutes to exhaustion
Trial B: With breakfast (400 cals)
136 minutes to exhaustion
Schabort, Noakes. MSSE 31 (3):464. 1999
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Pre-exercise meal timing
Large meal: 4 - 6 hours
Lighter meal: 2 - 3 hours
Snack: .5 - 1 hour
Timing varies with:
• Intensity of exercise
• Personal tolerance to food
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Pre-exercise food guidelines
• High carbohydrate
• Low fat
• Moderate protein
• Extra fluids
• Appropriate portions
• Tried and trueTrinity-Pawling School
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What’s good for quick energy before exercise...?
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Pre-exercise sugar
• Generally enhances performance (but not health)
• May cause hypoglycemia and needless fatigue if you are “sugar sensitive”
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Safest bet: Avoid sweets 15 - 45 minutes pre-exercise
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The best energy boosters
BREAKFAST and LUNCH!
• Prevent the need for quick energy
• Eat before you run out of fuel.
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Breakfast: Better than a quick fix
STUDY: Athletes with low glycogen stores biked hard for 45 minutes, then sprinted for 15 minutes
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Trial Improvements during final sprint
#1. Baseline: No fuel, only water --- ---Snack five minutes pre-exercise---
#2. Sugar (180 cals glucose) + water +10 %
#3. Energy bar (270 cals) + water +10 %
#4. Breakfast 4 hrs before + Energy bar + water +20 % (800 cals)
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What’s best for energy during exercise?
• Sports drinks
• Diluted juices (1/2 strength)
• Energy bars, gels, jelly beans + water
• Fruit, hard candies + water
Target 100 - 300 calories of carbs/hour, after the first hour
For exercise >1 hour, maintain blood glucose with––
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What’s best for fluids?
Tap
Water?Sports Drink?Vitamin- water?
Energy
drink?
Recovery drink?
Fitness water
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Fluid choices
• For exercise <60 minutes: water• For exercise >60 minutes: water + carbs
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Target 100-250 calories/hour from a beverage with 50-80 cal/8 oz
Gatorade 6 % Carb 50 Cals/8 oz.
PowerAde 7 % 70
Cola 11 % 100
Apple juice 12 % 120
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Fluid goals
• Prevent dehydration
• Drink before you are thirsty!
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Dehydration hurts performance
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Percent Lbs. lost Physical Effect Dehydration (for 150 lb person)
1% 1.5 Increased body temperature
3% 4.5 Impaired performance
5% 7.5 G.I. problems, heat exhaustion
7% 10.5 Hallucinations
10% 15.0 Circulatory collapse
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Symptoms of dehydration
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• Dark urine
• Small volume of urine
• Elevated heart rate
• Headache Urine Color Chart* 1-3 = adequately hydrated
*Source: L. Armstrong PhD
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Fluid guidelines
Event Fluid goals
• 2 hours pre-exercise 16 - 24 ounces
• 15 minutes pre-exercise 8 - 16 ounces
• Every 15 minutes during 6 - 12 ounces
• After exercise Until urine is pale
• Daily Enough to urinateevery 2 - 4 hours
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Do I need
sports drinks
to replace
electrolytes?
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Sodium losses during exerciseOne pound of sweat loss contains: 450 - 700 mg. sodium
Losses in 1 hour hard exercise in heat: 900 - 2,800 mg.
Sodium content of the body: 97,000 mg (42 tsp salt)
Replacements mg sodium
Coke, 8 oz. 1 Cheese stick, 1 oz 200
Endurolytes, 1 capsule 40 Pizza, 1 slice 500
Gatorade, 8 oz. 110 Salt, 1/4 teaspoon 600
Gatorade Endurance 200 Soup, 1 can 2,200
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Sodium replacement
• While training: not necessaryThe typical athlete’s diet provides enough sodium
• During moderate exercise: not necessary
• During ultra-distance events: wise choice
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Consuming additional salt–
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What about coffee …?
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...Does caffeine
enhance
performance?
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Caffeine and exercise
Pro: May make exercise seem easier and enhance performance.
Con: May cause nervousness, upset stomach, and “coffee jitters.”
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Each person responds differently.
Know your body!
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Caffeine: Individual responsesSTUDY: 10 subjects , 6 trials--3 with caffeine
Exercise test: 30 minutes progressively harder cycling
Caffeine dose: 3 mg caffeine/lb 1 hour pre-exercise
Measured: Total work performed (calories)
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+25
+12+14 +9 +8 +6+5
+1 +.5
-1.5
Improvements with caffeine (calories burned)
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Caffeine in foods & drugs
Coke, 12 oz can 35 mg
Clif Shot, mocha 50
Excedrin, 1 tablet 65
Red Bull, 8 oz. can 80
Vivarin, 1 tablet 200
Coffee, 12 oz mug 150
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Dose that aids performance: 1.5 to 4 mg caffeine/lb body wtAbout 225 to 600 mg caffeine for 150 lb person
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How can I gain weight healthfully?
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Weight gain tip
Consistently
eat three full meals every day
plus
afternoon and bedtime snacks.
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Weight gain tip
Eat larger portions.
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Drink calorie-boosting fluids
Fluid Amount Cost
Cranapple juice 12 oz. $ .55
Instant Breakfast 8 oz. $ .55
Ensure Plus 8 oz. $1.50
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For 230 calories:
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Choose calorie-dense foods
Calories/cup
Orange juice 110Cranberry juice 170
Cheerios 90Granola 500
Green beans 40Corn 140
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Weight gain tip
Do strengthening exercises
to build muscles.
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How can I lose weight
and have
energy to exercise?
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Weight loss tip-
Enjoy a satisfying breakfast and lunch,
then have a lighter dinner.
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Breakfast/Snack Lunch/Snack Dinner/Snack
Men 700-800 700-800 700-800
Minimum calories for most athletes–
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Weight loss tip-
Limit fatty foods
• Butter • Cheese
• Margarine • Chips
• Mayonnaise • Salad dressing
• Oil • French fries
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Weight loss tip-
Fuel muscles with wholesome carbohydrates.
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• Bran cereal • Whole wheat bagels • Potato
• Fruits • Multi-grain breads • Vegetables
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Weight loss tip-
Be realistic with weight goals!
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Women: 1/2 - 1 lb / week
Men: 1 - 2 lb / week
Weight loss targets–
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Weight loss warning-
Don’t get too thin!
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The thinnest athlete ≠ the best athlete
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Words of sports nutrition wisdom
When you eat well,
• You feel better and
• You exercise better
You will always win with good nutrition!
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