Please ensure you have the
correct course syllabus
-this is Nutrition 2107please see correct course
syllabus on my website
(under Nutrition 2107)
Office hours
Tuesdays and Thursdays
11 am – 1:30 pm
Lecture 2
11 January 2016
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- 13 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 its
impact on us through:
ingestion
digestion
absorption
transport
metabolism
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
Carbohydrates
Lipids
Proteins
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
Alcohols
Phytochemicals
Additives- e.g. food colouring
Preservatives- 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
interpret data
question (s)
data
conclude
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- 13 January- IDATME, DRIs,
Canada’s food guide, food labels, physical
activity guidelines-please bring these last 3 on
13 January