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Transcript of SPORTS NUTRITION By: Eric Williamson, BSc BA. EXERCISE NUTRITION Helping you meet your fitness and...
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SPORTS NUTRITION
By: Eric Williamson, BSc BA
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EXERCISE NUTRITIONHelping you meet your fitness and health goals using the other half of the equation
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Agenda Where do we get Nutrition Advice? What to Eat Before and After Exercise Protein Metabolic Damage Supplements The Best Diet Resources
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Three Nutrients that contain Energy?
Carbohydrates
Protein
Fat
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Where Do Athletes get their Nutrition Advice?
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What to Eat Before and After Exercise
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What High Power Athletes Do
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Time Food Nutrient Totals7:45am 175g Low Fat Greek Yogurt
1 Cup Blueberries1 Cup Oats1 Slice Toast w/ 1 tbsp of Peanut Butter
Carbohydrate: 93gProtein: 31gFat: 17g
10:00 am 1 Bagel w/ 1 Tablespoon Strawberry Jam1 Cup Low Fat Milk
Carbohydrate: 72gProtein: 14gFat: 8g
11:30am 20 Pretzel Sticks Carbohydrate: 25gProtein: 6gFat: 2g
11:40 am 355 ml Sports Drink Carbohydrate: 23g Protein: 0gFat: 0g
12:00pm-3:00pm (During activity)
1 L Sports Drink Carbohydrate: 65gProtein: 0gFat: 0g
Totals Carbohydrate: 278g Protein: 51gFat: 27gCalories: 1559
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Time Food Nutrient Totals3:15pm 1 Energy Bar
1 Banana1 Protein Shake
Carbohydrate: 63gProtein: 24gFat: 3g
5:30pm 1 Cup Cooked Pasta½ cup Tomato Sauce2 oz. Extra Lean Ground Beef
Carbohydrate: 44gProtein: 26gFat: 10g
8:30pm 1.5 Cup Garden Salad w/ 1 tbsp Salad Dressing and 2 Tbsp Sunflower Seeds1.5 Cups Rice3 oz. Chicken
Carbohydrate: 72gProtein: 23gFat: 19g
10:00pm ½ Cup Cottage Cheese½ Cup Berries¼ Cup Almonds
Carbohydrate: 24g Protein: 23gFat: 22g
Totals Carbohydrate: 203gProtein: 96gFat: 54gCalories: 1682
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Grand Totals: Carbohydrate: 481gProtein: 147gFat: 81g
Calories: 3241
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Average People
3 to 5 meals/snacks per day
1700-2800 calories per day
1 hour workouts
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When Should the Biggest Meal of Your Day Be?
The majority of your carbohydrates should be consumed closest to your workout Last meal prior
or First meal after
Stomach cramps during exercise? Lower protein, fiber and/or fat at your last
meal or snack before exercise
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Post-Workout Nutrition
Plan to have one of your regular snacks or meals soon (within 2 hours) after your workout.
Aim for at least 10-20g of protein
Protein and carbohydrate post workout supplementation not needed for most moderate exercisers.
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Protein
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Protein
Most satiating nutrient which can help to regulate intake.
Slight increase in metabolic rate after consumption.
Required for muscle repair.
Recommendation per meal: 20-35g
Phillips SM (2012). Dietary protein requirements and adaptive advantages in athletes. The British journal of nutrition.
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Layman DK (2009). Dietary Guidelines should reflect new understandings about adult protein needs. Nutrition and Metabolism.
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Does Protein + weight lifting =
+ Testosterone
DoesProtein + weight lifting =
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Metabolic Damage
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Metabolic Damage
Other names: Starvation mode, weight loss resistance, adrenal fatigue, neuroendocrineimmune dysfunction or adaptive thermogenesis
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Adaptive Thermogenesis
“This metabolic adaptation is a biologically meaningful survival mechanism that conserves energy in the face of starvation and dangerously low energy supplies”
Camps SG, Verhoef SP and Klaas WR. Weight loss, weight maintenance and adaptive thermogenesis (2013). The American Journal of Clinical Nutrition
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Adaptive Thermogenesis
Rule #1: DO NOT eat as little as possible!
Signs and symptoms: Uncontrollable cravings for sweet, salty and high fat foods, no fat loss, weight gain, gas, bloated feeling, development of intolerances, amenorrhea, insomnia and lack of motivation to complete workouts
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Fat loss needs to be taken slowly in order for success.
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Supplements
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Dietary Supplements
A nutrient or ingredient that is consumed in an isolated form because it cannot be obtain in optimal amounts through diet.
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Protein
Bars and Powders Unable to obtain enough protein from
whole foods Need something easily transportable or no
access to a refrigerator Between competitive events Trying to gain weight Use in baking healthy snacks
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Sports Drinks
Carbohydrate based The exercise is intense and lasts longer than
an hour (eg. soccer, hockey, basketball or interval training)
You sweat a lot and notice cakey white salt lines on your clothes.
You wear a lot of protective equipment like in hockey or football.
The weather is hot and humid. Your fluid needs to be quickly replaced (e.g.
during soccer tournaments or two-a-day training sessions).
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Iron
As indicated by Ferritin levels in blood test Low iron is common because of a hormone
known as Hepcidin which is increased by activity and lowers iron absorption.
What to look for: <30 (women) or <50 (men) = performance
decrement, tiredness, fatigue <12 = anemia (most labs)
*Make sure you take your results to your dietitian or physician to determine an appropriate dosage as overdosing on iron is possible and is very dangerous.
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Vitamin D
<20 = risk of rickets 20-50 = satisfactory, no risk of disease 75-100 = good, improved strength,
power and all around performance found in active individuals
100+ = found in populations who work out doors in tropical regions of the world
Recommendation: 1000IU daily
Todd JJ, Pourshahidi LK, MscSorley EM, Madigan SM and Magee PJ (2015). Vitamin D: recent advances and implications for athletes. Sports medicine.
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Other Supplements
Creatine - Increases strength, power and recovery between high intensity bouts. Side effects include water weight gain and a more bloated look.
Beta-Alanine – Increases lactic acid buffering. Reduces the burning sensation felt during certain exercises.
Caffeine – Stimulates the central nervous system.
Sodium Bicarbonate – Increases lactic acid buffering by making your blood more basic/alkaline. Can cause severe vomiting if overdosed.
Beet Root Powder (or whole beets) – Nitric oxide booster. Natural source of nitrates which convert to nitric oxide in the body. Nitric oxide dilates blood vessels supplying muscles with more blood, oxygen and nutrients.
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The Best Diet
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“Adherence is the only consistent factor associated with weight loss and disease related outcomes.”
Pagoto SL, Appelhans BM (2013). A Call for an End to the Diet Debates. JAMA
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1. Whole foods2. Control appetite3. Improve food quality4. Promote exercise5. Raise nutritional awareness
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The Best Diet
Everyone is individual Whole foods, whole foods, whole foods The key is persistence, determination
and adherence “Many cultures eat better and are
healthier than North Americans, yet with significantly less nutrition knowledge” Jen Sygo
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Takeaways Information from valid and reliable sources. Largest carbohydrate meal closest to
exercise and a meal or snack within 2 hours of activity.
Protein at every meal, including breakfast. First balanced nutrition, then sports
nutrition, then supplements. Successful fat loss occurs slowly. Be aware, be persistent.
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Resources
Nutrition Classes/Professors here at Carleton Jane Skapinker here at Carleton -
http://dining.carleton.ca/nutrition/
Yoni Freedhoff - http://www.weightymatters.ca/
Jennifer Sygo - http://news.nationalpost.com/author/jsygonp/
Precision Nutrition - http://www.precisionnutrition.com/
Examine.com - http://examine.com/