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Please ensure you have the correct course syllabus -this is Nutrition 2107-please see correct course syllabus on my website (under Nutrition 2107)
Office hours
Tuesdays and Thursdays
11 am – 1:30 pm
Lecture 2 7 January 2015
Overview of Nutrition
Overview of lecture
1)Introduction -sports nutrition in a nutshell
2) Nutrition and Nutrients defined
3) Nutrients classified
4) Science of nutrition
5) Next lecture- 12 January- IDATME, DRIs, Canada’s food guide, food labels, physical activity guidelines
SPORTS NUTRITION IN A NUTSHELL
Choices of quantity and quality of nutrition have significant impact on athletic performance
“A Proper Diet Can’t Make An Average Athlete Elite, But A Poor Diet Can Make An Elite Athlete Average”
Nutrition-defined-narrow
science of what we eat and itsimpact on us through:
ingestiondigestion absorptiontransportmetabolism
excretion
IDATME
Nutrition-defined-broad
previous narrow definition
plus
psychology, economics, sociology, and culture of food and eating
Nutrients defined
chemical substances obtained from food and used in the body to provide:
-energy, structural materials and regulating agents to support growth, maintenance, repair of the body and athletic performance
-possible disease prevention and reduction
Nutrients classified
Energy yielding
Non-energy yielding
Non-nutrients
Energy yielding nutrients-all organic-carbon containing
CarbohydratesLipidsProteins
4/9/4 kcal/gm – remember calories are really kcal
17/37/17 kjoules/gm
-energy for warmth, body maintenance (build new compounds/turnover), movement
Non-energy yielding nutrients
-but can assist in deriving energy
Vitamins-organic
Minerals-inorganic-non-carbon containing
Water-inorganic
In food, nutrients are also classified as:
Essential or indispensable vs. non essential nutrients vs. conditionally essential
Also have non-nutrients-helpful, neutral, or harmful
AlcoholsPhytochemicalsAdditives- e.g. food colouringPreservatives- e.g. nitrogen containing
molecules that are anti-bacterial
Science of nutrition
Separating fact from rumour via studies:
Epidemiological (no intervention) -case-control, cross sectional, cohort
Experimental (intervention) - animal, in vitro (eg cell culture), human
Fig. 1-4, p. 14
Science of nutrition
-all investigations follow good scientific method:
question hypothesis data
interpret data conclude
question (s)
Fig. 1-3, p. 12
Summary of lecture
1)Introduction -sports nutrition in a nutshell
2) Nutrition and Nutrients defined
3) Nutrients classified
4) Science of nutrition
5) Next lecture- 12 January- IDATME, DRIs, Canada’s food guide, food labels, physical activity guidelines-please bring these last 3 on 12 January