sports nutrition, recovery and hydration · • dehydration and hyponatremia are unacceptable and...
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Sports Nutrition, Recovery
and Hydration
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Endurance Events
• Carbohydrate-Loading
• Eat a high carbohydrate diet
• 3-5 days prior to events
• 60-70% of your diet
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Endurance Events
• Reduce training while carb-loading
• Allows muscles to repair
• Allows muscles to replenish
• Increase glycogen
• Maximize hydration
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Endurance Events
• Events where exercise may last more
than 75 minutes
• Military exercises and operations
• Pack marches
• Marathon, half-marathon
• Triathlon
• Bike race
• Long, hard workouts
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Carbohydrate & Exercise
Guide for Endurance Events
Number of days before race
Exercise duration Training diet (% Carbs)
6 90 min 60%
5 40 min 60%
4 40 min 60%
3 20 min 70%
2 20 min 70%
1 Rest 70%
Event Go for it! Small meal before event
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Endurance Events
• Use sports drinks or gels during
glycogen depleting events
• Events greater than 60-75 minutes
• Food is not available / allowed
• Salt tablets are not recommended
unless for medical reasons
• Physician prescribed
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Sports Drinks
• Improve endurance performance
• Carbohydrate (6-8%)
• Potassium
• Sodium
• Water
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Sports Drinks Cont.
• Help to
• Hydrate
• Maintain hydration
• Re-hydrate
• Maintain blood glucose
• Keep up with calorie needs
• Endurance athletes can need 2-5 times
the calories of sedentary people
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Sports Drinks Cont.
• All Sport (7%) 17 g / 8 fl.oz
• Gatorade (6%) 14 g / 8 fl.oz
• 10-K (6%) 14 g / 8 fl.oz
• Power Ade (4%) 19 g / 8 fl.oz
• Accelerade (+Pro) 16 g / 8 fl.oz
• Gatorade Endurance 14 g / 8 fl.oz
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Gels
• Gel packets can also be used for
endurance events
• Most gels contain about 25-30 grams
of carbohydrate per packet
• Drink 5+ ounces of fluid with each gel
pack consumed
• Some companies add caffeine and
protein to their packets
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Sports Drinks w/ Protein
• Some companies use small amounts
of amino acids to enhance sports
drinks
• Accelerade
• Endurox
• Amino Vital
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387 Marine Corps Recruits
• 3 post-exercise groups
• Placebo• 0 carbohydrate, 0 protein, 0 fat
• Carbohydrate• 8 carbohydrate, 0 protein, 3 fat
• Protein • 8 carbohydrate, 10 protein, 3 fat
Flakoll PJ, Judy T, Flinn K, Carr C, Flinn S. Post exercise protein supplementation improves health and muscle soreness during basic military training in marine recruits. J Appl Physiol.96:951-956,2004.
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Protein group had fewer
issues
33%28%
83%
37%
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Medical Issues
Medical visits
Viruses
Heat Illness
Muscle or Joint
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Non-Endurance Athletes
• No specific diet
• (5K, PRT, PFT, CFT, track & field,
recreational sports)
• Priority is to optimize skill and body
composition
• Carbohydrate should be 45-70%
• Fat should be 20-30%
• Protein should be 12-20%
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Non-Endurance Athletes
• Sport-specific diets are not always healthy!
• Weight sports:
• Bodybuilding
• Boxing
• Wrestling
• Rowing
• Aesthetic Sports
• Figure-skating
• Gymnastics
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Pre-Event Meal
• Carbohydrate and Protein
• 300-500 calories about 3-4 hours prior
to event
• 50-100 calorie snack about 1 hour
prior
• Granola bar
• Low-fat milk
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Pre-Event Meal
• Cold cut sandwich
• Pasta with meat or meat sauce
• Rice and beans
• Meat with mashed potatoes or rice
• Shake
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Sports Nutrition Recovery
• Recover immediately post-event
with a shake or beverage
• Flavored milk
• Skim milk
• Then a well balanced post-event
meal similar to pre-event meal
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Low-Fat Milk
• Perfect for non-endurance athletes
• Very good for endurance athletes
• Provides
• Carbohydrate
• Protein
• Electrolytes
• Vitamins
• Minerals
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Carb Recommendations
• 2.7-4.5 grams of carbohydrate per
pound of body weight per day
• Adjust based off activity level
• Choose Whole Grain Carbohydrates
• Whole wheat bread, pasta, rice, cereals,
wraps, oatmeal
• Fruit and Vegetables
Position of the American Dietetic Association, Dietitians of Canada, and the American College of Sports
Medicine: Nutrition and Athletic Performance. J Am Diet Assoc. March 2009.
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Protein Recommendations
• Very Active Individual
• 0.6-0.8 grams of protein/lbs.
• 0.9+ grams of protein/lbs is
unnecessary Position of the American Dietetic Association, Dietitians of Canada, and the American College of Sports Medicine:
Nutrition and Athletic Performance. J Am Diet Assoc. March 2009. Nancy Clark’s Sports Nutrition Guidebook.
1997. Clinical Sports Nutrition. Burke L, Deakin V. 2006.
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Fat Recommendations
• Not as precise as protein and carbohydrate
• 20-30% of intake should be from fat
• Maintain calorie balance with nutrient dense fat choices
• Nuts
• Seeds
• Nut butters
• Olive oil
• Canola oil
• Fish
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Electrolytes
• Electrolytes will replenish easily with a
balanced post-exercise meal or snack
• Sodium
• Low-fat milk, pretzels, bread, yogurt
• Potassium
• Fruit, vegetables, yogurt, low-fat milk,
potatoes
Nancy Clark’s Sports Nutrition Guidebook. 1997.
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Water
• Transport mechanism
• Main component of blood
• Eliminates waste products
• Temperature regulation
• Heat escapes in sweat
• Involved in biochemical reactions
• Digestion and energy production
• Lubricates joints and cushions organs Nancy Clark’s Sports Nutrition Handbook, 1997 Sports Nutrition, 1999, American Dietetic Association
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Dehydration Decreases
Performance • Loss of 1 Liter (1.4% body weight) of water causes
• 8 extra heart beats/min
• Cardiac output to decline by 1 Liter/minute
• Core body temp to increase by 0.3 degrees C
• 2 Liters (3% body weight) of water loss causes • 10% loss of contractile strength
• 8% loss of speed
• Lack of concentration
• Difficulty breathing
Mountain SJ, Coyle EF, et al. Influence of graded dehydration on hyperthermia and cardiovascular drift during exercise. J A;;l Physiol 73: 1340, 1992.
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Sweat Rate
• Average sweat rates
• 1 Liter per hour
• 3-4 Liters per hour depending on:
• Intensity and duration of activity
• Age
• Fitness level
• Air
• Temperature
• Humidity
• Cloud cover
• Clothing
• Individual sweat rate
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Hydration Guidelines
• Golden Rules of Endurance Exercise
• 8-10 cups of fluid a day
• Consume 2 cups-2 hours prior
• ½-1 cup 10 minutes prior
• 1 cup every 20 minutes during
• 1 pound of body weight lost= 2-3 cups of fluid
Winning Sports Nutrition. 1994
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Hydration Guidelines
• Drink before you’re thirsty!
• Thirst is a sign that you are already
dehydrated
• Slightly yellow = 1 canteen (32 ounces)
• Dark yellow = 1 canteen in 15 minutes
• Then drink a second
• Orange or almost orange
• 2-3 canteens as quickly as possible
• In addition to a meal, snack and/or sports
drink to ensure electrolyte replenishment
• 2-4 canteens a day
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Hydration Status
• Fluid intake should match fluid losses
• Monitor urine
• Pre-exercise urine should be ~3
• If urine color darker than 6-7 increase
liquid
• Dehydration and hyponatremia are
unacceptable and avoidable
• Dehydration is not an outcome of exercise,
combat or operations
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Risk Factors for Heat Illness
• 2 workouts a day
• 80+ degrees F
• 40%+ humidity
• Un-acclimated
• Low levels of fitness
• Overweight
• Supplements
• Dehydrated
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Preventing Dehydration
• Stay hydrated!
• Know your sweat rate and replace lost
sweat
• Weigh yourself before PT and again
after PT
• With every pound of weight lost
• Consume 20-24 fluid ounces
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Preventing Dehydration
• Avoid losing significant weight during
your workout by replacing your fluids
during your workouts
• If you lost 1 pound during your workout
and didn’t drink during your workout, add
16 ounces to your next workout
• 4 ounces every 15 minutes would suffice
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10 Rules for Results
1. Eat more calories to gain muscle!
• Multiply your bodyweight in pounds by 15-17 to get calories needed for the day
• A 150 lb x 15-17= 2,250-2550 calories each day
• Cardio increases, calorie needs increase
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10 Rules for Results
2. Think carbohydrates and protein!
• Weight lifters should consume:
• 4-6 grams of carbohydrate per pound to get
bigger
• 0.6-0.9 grams of protein for every pound per
day
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10 Rules for Results
3. Stay Hydrated!
• 2 Liters (3% body weight) of water loss causes
• 10% loss of contractile strength
• 8% loss of speed
• Lack of concentration
• Difficulty breathing
Mountain SJ, Coyle EF, et al. Influence of graded dehydration on hyperthermia and cardiovascular drift during exercise. J A;;l Physiol 73: 1340, 1992.
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10 Rules for Results
4. Eat breakfast!
• Individuals who eat breakfast on most days tend
to have a lower BMI
• Eat a small meal prior to physical training,
especially weightlifting to prevent muscle
breakdown
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10 Rules for Results
5. Eat within 20 minutes of PT!
• It’s the window of opportunity!• Optimize glycogen storage
• Reduce muscle breakdown
• Enhance protein rebuilding
• Replenish creatine phosphate and ATP
• Good food choices are:• 2 cups of chocolate milk or flavored soy milk
• 2 cups of Low-fat milk
• A sandwich with 2-3 ounces of meat
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10 Rules for Results
6. Graze like a cow!
• Small snacks instead of big meals
• Avoid more than 3-4 hours without
eating a small PFC snack or meal
(i.e., protein, fat, carbohydrate)
• Avoid eating a P, F, or C snack only
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10 Rules for Results
7. Eat fat to look phat!
• Eat mono and poly-unsaturated fats:
• Flaxseed, fish, olive oil, canola oil, nuts,
seeds, and nut butters
• Avoid Trans fat and saturated fat
• Even skinny athletes have to worry about
heart disease!
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10 Rules for Results
8. Legs, legs, legs!
• Working big muscles
• Increases the release of growth hormone and
testosterone
• Creates balance
• Reduces chance of injury
• Increases power and functional strength
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10 Rules for Results
9. Sleep!
• 7-9 hours per night
• No. 1 most powerful stimulator of natural
growth hormone release
• Sleep also effects appetite regulating
hormones and insulin sensitivity
• Leptin lowers appetite
• Grehlin increases appetite
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10 Rules for Results
10. Be patient!
• Muscle hypertrophy takes several weeks
depending on the resistance training
program
• Maximum testosterone levels are not
reached until late 20’s or early 30’s
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43
Questions?