the ketogenic diet & optimal athletic performance · •daily carb intake below 30g to induce...
TRANSCRIPT
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The Ketogenic Diet & Optimal Athletic
PerformanceAre fats the new fuel to boost sports performance?
Looking at trends in sports nutrition for improved fitness
Dr Andréa Proulx ND
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A bit about me
•Dr Andréa Proulx ND
•Naturopathic doctor - ND
•Private practice•Active Health Institute
•IHN Instructor•Biochemistry & Body Metabolism•Sports Nutrition and Fitness
www.DrProulx.com@DrAndreaProulx
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About Naturopathic Medicine
•4 year post-graduate
•Holistic, evidence-based medical approach
•Use natural therapies •Nutrition, herbal medicine, acupuncture, etc.
•Prevention & Health education
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About Holistic Nutrition
•Institute of Holistic Nutrition
•19 courses
•713.5 in-class hours•Including Fitness & Sports Nutrition
•Mandatory 100 hour placement program
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About me – the Sports Edition
•Former varsity pole vault
•Marathoner – 4 minutes shy of Boston!
•Ultimate frisbee•Frequent medalist at Canadian Nationals•Team Canada 2017
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The Carb Myth?
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What is a Ketogenic Diet
•Low carb diet to shift metabolism into a state of ketosis
•Ketosis: A physiological insulin deficient state which triggers the lipolytic process in adipose tissue with the result that free fatty acids pass into the plasma for uptake by the liver and other tissues.
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Insulin Low
&
Glucagon Rise
• Low blood sugar state
Fat breakdown• Free fatty acids released into
bloodstream
Ketogenesis • Ketone bodies as fuel
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Ketogenic Diet Goal
•Ultra low sugar (carb) intake to force body into ketosis – a state where the body burns fat to makes ketones for energy
•It’s all about blood sugar levels!•Any food is allowed, as long as it keeps your sugars low
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Nutritional vs Diabetic Ketoacidosis
Nutritional ketosis •Evolutionary adaptation to counter long periods of undernutrition due to unreliable food supplies•No pH change
Pathological diabetic ketoacidosis•Higher levels of ketone bodies causing lowering of blood pH
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Pathologic / Metabolic Acidosis
•Can be seen in ncontrolled diabetes, prolonged fasting, starvation
•Breathe fast, fast heartbeat
•Headache
•Confusion
•Tired, weak, nauseous
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Ketogenic versus Low-Carb?
•Terms frequently used interchangeably
•Very Low Carbohydrate Ketogenic Diet - VLCKD•Daily carb intake below 30g to induce “nutritional ketosis”
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How To – Grocery List
•Fruit – berries in moderation
•Lemons•Avocadoes•Veggies – lots!
• Except veggies that grow underground, peas, corn
•Mushrooms•Fermented foods•Meat – high quality
•Dairy – in moderation
•Butter – grass-fed
•Nuts, seeds•Spices, herbs, vinegars, oils
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Leave Behind
•Fruit – except berries
•Root veggies – potato, yams, beets
•Grains
•Legumes – mostly
•Processed foods, oils
•Alcohol
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Medical Uses of Keto-Diet•1920s - therapy for epilepsy
•1960s - most common methods for obesity treatment (medically supervised)
•2000s - evidence for therapeutic use in many pathological conditions•Diabetes, PCOS, acne, neurological diseases, cancers, respiratory and cardiovascular disease
European Journal of Clinical Nutrition (2013) 67, 789–796. Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. A Paoli et al
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Keto and Weight Loss
On a ketogenic diet•During training phases of high volume and low intensity …
• Increased fat metabolism•Reduced body mass and fat content•Decreased post exercise muscle damage
•However…. Keto diets decrease the ability to perform high intensity work, due to decreased glycogen muscle stores and the lower activity of glycolytic enzymes
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Weight Loss
•Lower body mass = less to move•You can jump higher, run faster!
•During the first days of keto, most of the weight loss is from glycogen use and water loss•Fat loss gradually increases after day 5
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Keto for Sport?
•Can the keto diet help me lose weight?
•Can keto help improve sport performance?•Endurance athletes?•Power athletes?
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Fats for Energy?
•Easy and unlimited “storage” in body
•Carbs have limited storage as glycogen in muscles
•9kcal of energy per gram of fat•Compared to 4kcal/g for carbs
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Welcome Fats!
•Fats are shuttled into cells via a unique transportation system - carnitine shuttle
•Endurance exercise turns off the carnitine shuttle ‘’off switch’’ which then increases fat burning even more!
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Endurance Training…•Increases muscle tissue that uses fats
•Increases the number and activity of transport proteins
•Increases the number of fat digesting enzymes
•Improves ability to spare carbs
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Endurance Athletes•20 elite ultra-marathoners & Ironman triathletes on keto diet for 20 months
Testing:•Maximal graded exercise test•180 min submaximal run @ 64% VO
2max
Metabolic characteristics of keto-adapted ultra-endurance athletes. Volek et al. Metabolism. Oct 2015
Control % Test Group %
Carbs 59 10
Fat 14 19
Protein 25 70
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Endurance Athletes
Conclusions: •Low-carb group had a peak fat oxidation 2.3-fold higher (and at higher VO
2max)
• VO2max is the maximum amount of oxygen that an individual can use during intense or
maximal exercise
• Muscle glycogen utilization and repletion patterns during and after 3hr run were similar
Metabolic characteristics of keto-adapted ultra-endurance athletes. Volek et al. Metabolism. Oct 2015
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Keto for Sport?
•Can the keto diet help me lose weight
•Can keto help improve sport performance?•Endurance athletes
•Power athletes?
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Off-Road Cyclists
•Participants: 8 Off-road male cyclists•Average age 28 years old•5+ years of training experience
•In keto diet group• Increased use of fats used as fuel•Heart rate significantly lower during exercise at maximal
intensity•Significant increase in VO
2max and O
2 uptake at lactate
threshold
The effects of a ketogenic diet on exercise metabolism and physical performance in off-road cyclists. Nutrients. 2014 Jun 27;6(7):2493-508. Zajac A
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Keto for Strength Athletes?
•Ketogenic diet does not affect strength performance in elite artistic gymnasts• 20 year old male gymnasts lost 4lbs fat with no loss or gain in lean muscle
Journal of the International Society of Sports Nutrition 2012, 9:34. Paoli et al.
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Beware Not to Burn Protein!
•Protein need increases in keto diet
•To preserve lean body mass, daily requirement for protein 1.2 - 1.7 g kg/body weight
➢However, more high quality studies are to confirm the effects of the keto diet on strength/power athletes
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What about Gaining Muscle Mass?
•Ketogenic diets, similar to fasting, blunts a chemical pathway which causes a reduced possibility of gaining muscle mass despite energy sufficiency
•Ketosis slows muscle protein breakdown, but does not stop it•Lean body mass generally is conserved
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Gaining Muscle Mass in the lab
•Short-term and long-term skeletal muscle hypertrophic responses to resistance exercise were measured
➢Mild nutritional ketosis does not impair the hypertrophic muscle responses to resistance exercise in rodents
J Appl Physiol. 2015 Dec 30
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Keto for Sport?
•Can the keto diet help me lose weight
•Can keto help improve sport performance?•Endurance athletes
•Power athletes
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Keto is Unsafe For You If:
•Uncontrolled diabetes•Pregnancy – need medical supervision•Pyruvate carboxylase deficiency – genetic disorder•Porphyria – rare hereditary disease•Fat metabolism disorders – genetic disorders•Kidney function concerns
•due to increase animal meat consumption
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Side Effects of Going Keto
•Nutrient status•Vitamin and mineral imbalances
•Constipation
•Possible Fatigue
•Possible Mental Fog
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Vitamin and Mineral Imbalance
•Sodium: Required for action potentials of neurological system•Be careful when adding sodium to diet- consult with a professional if needed
•Sodium can be found in: table salt, Himalayan salt, processed foods
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Vitamin and Mineral Imbalance
•Potassium: primary electrolyte needed for nerves and muscles•Potassium can be found in:
•Coconut•Dandelion and nettle teas•Almonds, pistacchios•Meat•Beet greens, spinach, Swiss chard, Bok choy•Avocados
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Vitamin and Mineral Imbalance
•Magnesium: Required for muscle relaxation
•Magnesium can be found in: Swiss chard, beet greens, spinach, basil
•Works in concern with potassium and calcium
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Fatigue, Mental Fog and Feces
•Lack of electrolytes in keto diet can cause fatigue and brain fog
•Increased meats and possible reduced fiber slows down gut motility…leading to constipation
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Keto – A How To
•Be Prepared
•Read Labels
•Track Your Macros
•Ensure your Micronutrients & Electrolytes
•Choose Quality Foods
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Be Prepared
➢Meat - Beef, veal, poultry, fish➢ Beware cold cuts
➢Eggs➢Dairy➢Nuts & Seeds➢Coconut cream, coconut milk, soy milk➢Oils: coconut, ghee, almond, fish, flaxseed, olive➢Flour: almond, flaxseed, psyllium husk, coconut➢Raw and cooked greens – no restrictions➢ Infused tea, coffee, herbal teas, cocoa powder
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Read Labels
•Look at grams (g) of macronutrients: carbohydrates, fats, proteins•Choose foods with low carb totals and HIGH fiber•Don’t look at the %
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Track Your Macros
•My Fitness Pal – app, website
•Nutrition Data.com
•KetoDietapp
•Ketogenic Diet app
•NutritionData.com
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Ensure your Micronutrients & Electrolytes•Micronutrients: all vitamins an minerals
•Electrolytes: ionic compounds, often referred to as salts•Sodium•Potassium•Magnesium
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Electrolyte Formula – Mix & Match
•Fresh lemon – 3g carb per 2 Tbs• Potassium
•Lime juice – 2g carbs per 2 Tbs•Sea salt•Coconut water – 4g carb (2g fiber) in ½ cup
• Potassium
•Pickle juice – 1g carb per 1 cup• Sodium
•As a general rule you want ¼ tsp of salt per 1L of fluid
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Be Informed
•Fiber Content•Keep the poops moving!
•Quality of Food•Free-range, grass-fed•Beware of ‘low-fat’ products – often filled with sugars (carbs)
•Omega-3 vs Omega-6
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Omega-3 & Performance
•Improves lung function in endurance athletes
•Helps to reduced bodyweight
•Improves the ability of muscle cells to take up glucose
•Reduces inflammation
•Supports hormone secretion
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Keto Resources
•KetoDietEBooks.com•Free e-books with recipes, meal plans
•Ruled.me/ketogenic-diet-food-list/•Lists of foods to eat, to avoid
•Reddit – subreddit Keto•Ideas, forums, recipes
•KetoDiet app
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Keto During Sport
•Ensure lots of electrolytes•Pack you own?
•Plan for ‘worse case scenario’•How long could this game/match last?•How little time could you have between bouts?•Rain delays? Injuries on ice delaying play?
•Plan for grazing and small snacks•Plan your time – don’t forget warm-up, travel•Beware flavour-fatigue
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Sport Supplementation
•Reduce inflammation
•Improve muscle repair
•Improve fat burning•L-carnitine•Vitamin C
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Sport SupplementationBuyer Beware!
•Read labels carefully•Colours•Flavours•Part of plant used•Form of micronutrient•Carbs?
•WADA, NSF certified
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Thank You & Happy Training
In private practice @ Active Health Institute
Let’s get in touch! DrProulx.com @AndreaProulxND
Thank you to Institute of Holistic Nutrition for sponsoring this talk ☺