Diet and Supplements. Use of supplements Multi-million dollars market 40 % of Americans Religion...
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Transcript of Diet and Supplements. Use of supplements Multi-million dollars market 40 % of Americans Religion...
Diet and SupplementsDiet and Supplements
Use of supplementsUse of supplements
Multi-million dollars market
40 % of Americans
Religion more than science
Quebec Athletes
26,45 % vitamins supplements
11,45 % creatine
TYPES OF PRODUCTSTYPES OF PRODUCTS
Supplements (powder, tablets or pills)
Herbal base products
Homeopathic products
Desired EffectsDesired Effects
Anticipated ergonegic effects tolerance to effort muscle strenght muscle volume
Stimulant (Booster)
Compensation for lack of due to : Bad nutritional habit High level energy expenditure
What is the issue?What is the issue?
Dietary Supplement Health Education Act (DSHEA, USA, 1994)
« allows nutritional supplements manufacturers to formulate valid or non-valid allegations about the effects of their products … »
NUTRITIONNUTRITION
Basis Needs and Requirements (CFG)
Athletes : reajust quantities
Diet rich in carbohydrate
Proper rehydration (before-during-after)
Maintain optimal body weight
Canada Food GuideCanada Food Guide
Grain Products
Fruits and vegetables
Milk Products
Meat and alternatives
Grain Products
Fruits and vegetables
Milk Products
Meat and alternatives
Guide for the AthleteGuide for the Athlete
Grain Products
Fruits and vegetables
Grain Products
Fruits and vegetables
Milk products
Meat and alternatives
Milk products
Meat and alternatives
PROTEINS AND AMINO ACIDSPROTEINS AND AMINO ACIDS
Role
Slightly increased needs in athletes
Don’t take too much
VITAMINS AND MINERALSVITAMINS AND MINERALS
Supplements are not necessary if diet is adequate
Special conditions
Risks if too much
VITAMINS AND MINERALSVITAMINS AND MINERALS
HELP FOR : Hemoglobin synthesis (iron) Maintain bone healthy (calcium) Immune system Many metabolic functions…
(ROLE of MICRO-NUTRIENTS)(ROLE of MICRO-NUTRIENTS)
VITAMINS AND MINERALSVITAMINS AND MINERALS
Restricted energy intake (restrictive weight loss diet)
Elimination of one or more food groups
Risk of deficiencyRisk of deficiency
CALCIUM AND VITAMIN DCALCIUM AND VITAMIN D
Mainly during growth (bone mass or density)
3 to 4 portions milk products
IRONIRON
1. Increased needs in adolescence Gain in muscle mass Gain in blood volume Menstruation (girls)
2. Regular Training Increase iron losses
3. Red Meat Best source
1. Increased needs in adolescence Gain in muscle mass Gain in blood volume Menstruation (girls)
2. Regular Training Increase iron losses
3. Red Meat Best source
IRON (PROLONGED DEFICIT)IRON (PROLONGED DEFICIT)
Limits maximal growth anticipated
Fatigue
Decreased attention
Alters mental performance
Headaches, dizziness
Alters immune system (infections)
Anemia
HYDRATIONHYDRATION
Simple and advantageous
Facilitates performance
Activity < 1 hour : water
Activity > 1 hour : sport’s drinks
Sport’s DrinksSport’s Drinks
Water source
Electrolytes
Carbohydrates
Vitamins and minerals
Good food value formulas
CREATINECREATINE
Food supplements :
proteins – amino acids
Exogenous source :
meat, fish
Endegenous source :
Mainly from liver synthesis
WHY DO ATHLETES USE THEM?WHY DO ATHLETES USE THEM?
PerformancePerformance
AppearenceAppearence
BothBoth
Creatine(n=487)Creatine(n=487)
50,1 %50,1 %
16,6 %16,6 %
33,3 %33,3 %
MECHANSISM OF ACTION(creatine)MECHANSISM OF ACTION(creatine)
Creatine : inportant role in energy production thru ATP in the skeletal muscle
Phosphocreatine facilatates ATP transport for the production of anaerobic energy
MECHANISM OF ACTION(creatine supplementation)MECHANISM OF ACTION(creatine supplementation)
Muscle creatine concentration
ATP prodcution during anaerobic exercises
creatine resynthesis
RESULTS(creatine supplementation)RESULTS(creatine supplementation)
Muscle creatine contents ( 20 %)
body mass due to water retention
Excess urine excretion of creatine
creatine in the muscle due to carbohydrate intake
BENEFITS(creatine supplementation)BENEFITS(creatine supplementation)
Possible benefits for very short and very intense activity
No benefits reported for aerobic activity
Long term benefits unknown
CREATINE / BENEFITS WHEN ASSOCIATED WITH MUSCLE TRAININGCREATINE / BENEFITS WHEN ASSOCIATED WITH MUSCLE TRAINING
Accelerates physiological adaptations
Body mass
Maximal power and strenght
Work load
Muscle mass
HEALTH RISKS(creatine)HEALTH RISKS(creatine)
Long term risks unknown
Reported and known effects Joint and muscle pain Abdominal cramps Metabolic disorders – thermoregulation Kidney problems Tendon injuries
BE CAREFUL (creatine)BE CAREFUL (creatine)
Not suggested if less than 18 years old
Products purity???
CONCLUSION/SUPPLEMENTSCONCLUSION/SUPPLEMENTS
Real benefits vs Risks
Too much or excess of = problems
Allegations : valid or non-valid
Presence of prohibited subtances
CONCLUSION/NUTRITIONCONCLUSION/NUTRITION
Proper diet is essential (www.coach.ca)
Expensive products vs healthy diet
Adequate hydration : easy and essential
5 BASIC QUESTIONS5 BASIC QUESTIONS
Do you know all the ingredients in the product? Are you sure that the product is safe??? You have verified with a qualified professional? Does the product contains banned substances
or of restricted use? Is you training plan optimal in regards to mental
and physical preparation, proper diet and adequate recovery periods?